Mark switch cases where we are expecting to fall through.
Fix the following warning (Building: rpc_defconfig arm):
drivers/video/fbdev/acornfb.c: In function ‘acornfb_parse_dram’:
drivers/video/fbdev/acornfb.c:860:9: warning: this statement may fall through [-Wimplicit-fallthrough=]
size *= 1024;
~~~~~^~~~~~~
drivers/video/fbdev/acornfb.c:861:3: note: here
case 'K':
^~~~
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Mark switch cases where we are expecting to fall through.
Fix the following warning (Building: mtx1_defconfig mips):
drivers/scsi/libsas/sas_discover.c: In function ‘sas_discover_domain’:
./include/linux/printk.h:309:2: warning: this statement may fall through [-Wimplicit-fallthrough=]
printk(KERN_NOTICE pr_fmt(fmt), ##__VA_ARGS__)
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/scsi/libsas/sas_discover.c:459:3: note: in expansion of macro ‘pr_notice’
pr_notice("ATA device seen but CONFIG_SCSI_SAS_ATA=N so cannot attach\n");
^~~~~~~~~
drivers/scsi/libsas/sas_discover.c:462:2: note: here
default:
^~~~~~~
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Mark switch cases where we are expecting to fall through.
Fix the following warning (Building: cavium_octeon_defconfig mips):
arch/mips/include/asm/octeon/cvmx-sli-defs.h:47:6: warning: this statement
may fall through [-Wimplicit-fallthrough=]
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Mark switch cases where we are expecting to fall through.
Fix the following warning (Building: allmodconfig arm):
drivers/power/supply/ab8500_charger.c: In function ‘ab8500_charger_max_usb_curr’:
drivers/power/supply/ab8500_charger.c:738:6: warning: this statement may fall through [-Wimplicit-fallthrough=]
if (di->vbus_detected) {
^
drivers/power/supply/ab8500_charger.c:745:2: note: here
case USB_STAT_HM_IDGND:
^~~~
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Mark switch cases where we are expecting to fall through.
Fix the following warning (Building: footbridge_defconfig arm):
drivers/watchdog/wdt285.c: In function ‘watchdog_ioctl’:
drivers/watchdog/wdt285.c:170:3: warning: this statement may fall through [-Wimplicit-fallthrough=]
watchdog_ping();
^~~~~~~~~~~~~~~
drivers/watchdog/wdt285.c:172:2: note: here
case WDIOC_GETTIMEOUT:
^~~~
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Mark switch cases where we are expecting to fall through.
Fix the following warning (Building: assabet_defconfig arm):
drivers/mtd/maps/sa1100-flash.c: In function ‘sa1100_probe_subdev’:
drivers/mtd/maps/sa1100-flash.c:82:3: warning: this statement may fall through [-Wimplicit-fallthrough=]
printk(KERN_WARNING "SA1100 flash: unknown base address "
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
"0x%08lx, assuming CS0\n", phys);
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/mtd/maps/sa1100-flash.c:85:2: note: here
case SA1100_CS0_PHYS:
^~~~
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Mark switch cases where we are expecting to fall through.
Fix the following warning (Building: sunxi_defconfig arm):
drivers/gpu/drm/sun4i/sun4i_tcon.c: In function ‘sun4i_tcon0_mode_set_dithering’:
drivers/gpu/drm/sun4i/sun4i_tcon.c:318:7: warning: this statement may fall through [-Wimplicit-fallthrough=]
val |= SUN4I_TCON0_FRM_CTL_MODE_B;
drivers/gpu/drm/sun4i/sun4i_tcon.c:319:2: note: here
case MEDIA_BUS_FMT_RGB666_1X18:
^~~~
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Mark switch cases where we are expecting to fall through.
Fix the following warning (Building: multi_v7_defconfig arm):
drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c: In function ‘sun6i_dsi_transfer’:
drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c:993:6: warning: this statement may fall through [-Wimplicit-fallthrough=]
if (msg->rx_len == 1) {
^
drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c:998:2: note: here
default:
^~~~~~~
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Mark switch cases where we are expecting to fall through.
Fix the following warning (Building: rpc_defconfig arm):
arch/arm/mach-rpc/riscpc.c: In function ‘parse_tag_acorn’:
arch/arm/mach-rpc/riscpc.c:48:13: warning: this statement may fall through [-Wimplicit-fallthrough=]
vram_size += PAGE_SIZE * 256;
~~~~~~~~~~^~~~~~~~~~~~~~~~~~
arch/arm/mach-rpc/riscpc.c:49:2: note: here
case 256:
^~~~
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Mark switch cases where we are expecting to fall through.
Fix the following warnings (Building: powerpc-ppa8548_defconfig powerpc):
drivers/dma/fsldma.c: In function ‘fsl_dma_chan_probe’:
drivers/dma/fsldma.c:1165:26: warning: this statement may fall through [-Wimplicit-fallthrough=]
chan->toggle_ext_pause = fsl_chan_toggle_ext_pause;
~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/dma/fsldma.c:1166:2: note: here
case FSL_DMA_IP_83XX:
^~~~
Reported-by: kbuild test robot <lkp@intel.com>
Acked-by: Li Yang <leoyang.li@nxp.com>
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
The new dma_alloc_contiguous hides if we allocate CMA or regular
pages, and thus fails to retry a ZONE_NORMAL allocation if the CMA
allocation succeeds but isn't addressable. That means we either fail
outright or dip into a small zone that might not succeed either.
Thanks to Hillf Danton for debugging this issue.
Fixes: b1d2dc009d ("dma-contiguous: add dma_{alloc,free}_contiguous() helpers")
Reported-by: Tobias Klausmann <tobias.johannes.klausmann@mni.thm.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Tested-by: Tobias Klausmann <tobias.johannes.klausmann@mni.thm.de>
Pull HID fixes from Jiri Kosina:
- a few regression fixes for wacom driver (including fix for my earlier
mismerge) from Aaron Armstrong Skomra and Jason Gerecke
- revert of a few Logitech device ID additions which turn out to not
work perfectly with the hidpp driver at the moment; proper support is
now scheduled for 5.4. Fixes from Benjamin Tissoires
- scheduling-in-atomic fix for cp2112 driver, from Benjamin Tissoires
- new device ID to intel-ish, from Even Xu
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/hid/hid:
HID: wacom: correct misreported EKR ring values
HID: cp2112: prevent sleeping function called from invalid context
HID: intel-ish-hid: ipc: add EHL device id
HID: wacom: Correct distance scale for 2nd-gen Intuos devices
HID: logitech-hidpp: remove support for the G700 over USB
Revert "HID: logitech-hidpp: add USB PID for a few more supported mice"
HID: wacom: add back changes dropped in merge commit
In fault_opcodes_write(), 'data' is allocated through kcalloc(). However,
it is not deallocated in the following execution if an error occurs,
leading to memory leaks. To fix this issue, introduce the 'free_data' label
to free 'data' before returning the error.
Signed-off-by: Wenwen Wang <wenwen@cs.uga.edu>
Reviewed-by: Leon Romanovsky <leonro@mellanox.com>
Acked-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Link: https://lore.kernel.org/r/1566154486-3713-1-git-send-email-wenwen@cs.uga.edu
Signed-off-by: Doug Ledford <dledford@redhat.com>
In fault_opcodes_read(), 'data' is not deallocated if debugfs_file_get()
fails, leading to a memory leak. To fix this bug, introduce the 'free_data'
label to free 'data' before returning the error.
Signed-off-by: Wenwen Wang <wenwen@cs.uga.edu>
Reviewed-by: Leon Romanovsky <leonro@mellanox.com>
Acked-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Link: https://lore.kernel.org/r/1566156571-4335-1-git-send-email-wenwen@cs.uga.edu
Signed-off-by: Doug Ledford <dledford@redhat.com>
In mlx4_ib_alloc_pv_bufs(), 'tun_qp->tx_ring' is allocated through
kcalloc(). However, it is not always deallocated in the following execution
if an error occurs, leading to memory leaks. To fix this issue, free
'tun_qp->tx_ring' whenever an error occurs.
Signed-off-by: Wenwen Wang <wenwen@cs.uga.edu>
Acked-by: Leon Romanovsky <leonro@mellanox.com>
Link: https://lore.kernel.org/r/1566159781-4642-1-git-send-email-wenwen@cs.uga.edu
Signed-off-by: Doug Ledford <dledford@redhat.com>
In cma_init, if cma_configfs_init fails, need to free the
previously memory and return fail, otherwise will trigger
null-ptr-deref Read in cma_cleanup.
cma_cleanup
cma_configfs_exit
configfs_unregister_subsystem
Fixes: 045959db65 ("IB/cma: Add configfs for rdma_cm")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: zhengbin <zhengbin13@huawei.com>
Reviewed-by: Parav Pandit <parav@mellanox.com>
Link: https://lore.kernel.org/r/1566188859-103051-1-git-send-email-zhengbin13@huawei.com
Signed-off-by: Doug Ledford <dledford@redhat.com>
Check conditions that are mandatory to post_send UMR WQEs.
1. Modifying page size.
2. Modifying remote atomic permissions if atomic access is required.
If either condition is not fulfilled then fail to post_send() flow.
Fixes: c8d75a980f ("IB/mlx5: Respect new UMR capabilities")
Signed-off-by: Moni Shoua <monis@mellanox.com>
Reviewed-by: Guy Levi <guyle@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Link: https://lore.kernel.org/r/20190815083834.9245-9-leon@kernel.org
Signed-off-by: Doug Ledford <dledford@redhat.com>
The UMR WQE in the MR re-registration flow requires that
modify_atomic and modify_entity_size capabilities are enabled.
Therefore, check that the these capabilities are present before going to
umr flow and go through slow path if not.
Fixes: c8d75a980f ("IB/mlx5: Respect new UMR capabilities")
Signed-off-by: Moni Shoua <monis@mellanox.com>
Reviewed-by: Guy Levi <guyle@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Link: https://lore.kernel.org/r/20190815083834.9245-8-leon@kernel.org
Signed-off-by: Doug Ledford <dledford@redhat.com>
ODP depends on the several device capabilities, among them is the ability
to send UMR WQEs with that modify atomic and entity size of the MR.
Therefore, only if all conditions to send such a UMR WQE are met then
driver can report that ODP is supported. Use this check of conditions
in all places where driver needs to know about ODP support.
Also, implicit ODP support depends on ability of driver to send UMR WQEs
for an indirect mkey. Therefore, verify that all conditions to do so are
met when reporting support.
Fixes: c8d75a980f ("IB/mlx5: Respect new UMR capabilities")
Signed-off-by: Moni Shoua <monis@mellanox.com>
Reviewed-by: Guy Levi <guyle@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Link: https://lore.kernel.org/r/20190815083834.9245-7-leon@kernel.org
Signed-off-by: Doug Ledford <dledford@redhat.com>
Introduce helper function to unify various use_umr checks.
Signed-off-by: Moni Shoua <monis@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Link: https://lore.kernel.org/r/20190815083834.9245-6-leon@kernel.org
Signed-off-by: Doug Ledford <dledford@redhat.com>
task_active_pid_ns() is wrong API to check PID namespace because it
posses some restrictions and return PID namespace where the process
was allocated. It created mismatches with current namespace, which
can be different.
Rewrite whole rdma_is_visible_in_pid_ns() logic to provide reliable
results without any relation to allocated PID namespace.
Fixes: 8be565e65f ("RDMA/nldev: Factor out the PID namespace check")
Fixes: 6a6c306a09 ("RDMA/restrack: Make is_visible_in_pid_ns() as an API")
Reviewed-by: Mark Zhang <markz@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Link: https://lore.kernel.org/r/20190815083834.9245-4-leon@kernel.org
Signed-off-by: Doug Ledford <dledford@redhat.com>
"Auto" configuration mode is called for visible in that PID
namespace and it ensures that all counters and QPs are coexist
in the same namespace and belong to same PID.
Fixes: 99fa331dc8 ("RDMA/counter: Add "auto" configuration mode support")
Reviewed-by: Mark Zhang <markz@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Link: https://lore.kernel.org/r/20190815083834.9245-3-leon@kernel.org
Signed-off-by: Doug Ledford <dledford@redhat.com>
In a congested fabric with adaptive routing enabled, traces show that
packets could be delivered out of order. A stale TID RDMA data packet
could lead to TidErr if the TID entries have been released by duplicate
data packets generated from retries, and subsequently erroneously force
the qp into error state in the current implementation.
Since the payload has already been dropped by hardware, the packet can
be simply dropped and it is no longer necessary to put the qp into
error state.
Fixes: 9905bf06e8 ("IB/hfi1: Add functions to receive TID RDMA READ response")
Cc: <stable@vger.kernel.org>
Reviewed-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Kaike Wan <kaike.wan@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Link: https://lore.kernel.org/r/20190815192058.105923.72324.stgit@awfm-01.aw.intel.com
Signed-off-by: Doug Ledford <dledford@redhat.com>
In a congested fabric with adaptive routing enabled, traces show that
packets could be delivered out of order, which could cause incorrect
processing of stale packets. For stale TID RDMA WRITE DATA packets that
cause KDETH EFLAGS errors, this patch adds additional checks before
processing the packets.
Fixes: d72fe7d500 ("IB/hfi1: Add a function to receive TID RDMA WRITE DATA packet")
Cc: <stable@vger.kernel.org>
Reviewed-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Kaike Wan <kaike.wan@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Link: https://lore.kernel.org/r/20190815192051.105923.69979.stgit@awfm-01.aw.intel.com
Signed-off-by: Doug Ledford <dledford@redhat.com>
In a congested fabric with adaptive routing enabled, traces show that
packets could be delivered out of order, which could cause incorrect
processing of stale packets. For stale TID RDMA READ RESP packets that
cause KDETH EFLAGS errors, this patch adds additional checks before
processing the packets.
Fixes: 9905bf06e8 ("IB/hfi1: Add functions to receive TID RDMA READ response")
Cc: <stable@vger.kernel.org>
Reviewed-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Kaike Wan <kaike.wan@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Link: https://lore.kernel.org/r/20190815192045.105923.59813.stgit@awfm-01.aw.intel.com
Signed-off-by: Doug Ledford <dledford@redhat.com>
When processing a TID RDMA READ RESP packet that causes KDETH EFLAGS
errors, the packet's IB PSN is checked against qp->s_last_psn and
qp->s_psn without the protection of qp->s_lock, which is not safe.
This patch fixes the issue by acquiring qp->s_lock first.
Fixes: 9905bf06e8 ("IB/hfi1: Add functions to receive TID RDMA READ response")
Cc: <stable@vger.kernel.org>
Reviewed-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Kaike Wan <kaike.wan@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Link: https://lore.kernel.org/r/20190815192039.105923.7852.stgit@awfm-01.aw.intel.com
Signed-off-by: Doug Ledford <dledford@redhat.com>
In a congested fabric with adaptive routing enabled, traces show that
the sender could receive stale TID RDMA NAK packets that contain newer
KDETH PSNs and older Verbs PSNs. If not dropped, these packets could
cause the incorrect rewinding of the software flows and the incorrect
completion of TID RDMA WRITE requests, and eventually leading to memory
corruption and kernel crash.
The current code drops stale TID RDMA ACK/NAK packets solely based
on KDETH PSNs, which may lead to erroneous processing. This patch
fixes the issue by also checking the Verbs PSN. Addition checks are
added before rewinding the TID RDMA WRITE DATA packets.
Fixes: 9e93e967f7 ("IB/hfi1: Add a function to receive TID RDMA ACK packet")
Cc: <stable@vger.kernel.org>
Reviewed-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Kaike Wan <kaike.wan@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Link: https://lore.kernel.org/r/20190815192033.105923.44192.stgit@awfm-01.aw.intel.com
Signed-off-by: Doug Ledford <dledford@redhat.com>
In siw_connect() we have an error flow where there is no valid qp
pointer. Make sure we don't try to de-ref in that situation.
Fixes: 6c52fdc244 ("rdma/siw: connection management")
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Bernard Metzler <bmt@zurich.ibm.com>
Link: https://lore.kernel.org/r/20190819140257.19319-1-bmt@zurich.ibm.com
Signed-off-by: Doug Ledford <dledford@redhat.com>
When ODP is enabled with IB_ACCESS_HUGETLB then the required pages
should be calculated based on the extent of the MR, which is rounded
to the nearest huge page alignment.
Fixes: d2183c6f19 ("RDMA/umem: Move page_shift from ib_umem to ib_odp_umem")
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Link: https://lore.kernel.org/r/20190815083834.9245-5-leon@kernel.org
Signed-off-by: Doug Ledford <dledford@redhat.com>
We need to check if we have CQEs pending before starting a poll loop,
as those could be the events we will be spinning for (and hence we'll
find none). This can happen if a CQE triggers an error, or if it is
found by eg an IRQ before we get a chance to find it through polling.
Signed-off-by: Jens Axboe <axboe@kernel.dk>
One of the components in LiteON CL1 device has limitations that
can be encountered based upon boundary race conditions using the
nvme bus specific suspend to idle flow.
When this situation occurs the drive doesn't resume properly from
suspend-to-idle.
LiteON has confirmed this problem and fixed in the next firmware
version. As this firmware is already in the field, avoid running
nvme specific suspend to idle flow.
Fixes: d916b1be94 ("nvme-pci: use host managed power state for suspend")
Link: http://lists.infradead.org/pipermail/linux-nvme/2019-July/thread.html
Signed-off-by: Mario Limonciello <mario.limonciello@dell.com>
Signed-off-by: Charles Hyde <charles.hyde@dellteam.com>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Commit 1b1031ca63 ("nvme: validate cntlid during controller initialisation")
introduced a validation for controllers with duplicate cntlid that runs
on nvme_init_subsystem(). The problem is that the validation relies on
ctrl->cntlid, and this value is assigned (from id_ctrl value) after the
call for nvme_init_subsystem() in nvme_init_identify() for non-fabrics
scenario. That leads to ctrl->cntlid always being 0 in case we have a
physical set of controllers in the same subsystem.
This patch fixes that by loading the discovered cntlid id_ctrl value into
ctrl->cntlid before the subsystem initialization, only for the non-fabrics
case. The patch was tested with emulated nvme devices (qemu) having two
controllers in a single subsystem. Without the patch, we couldn't make
it work failing in the duplicate check; when running with the patch, we
could see the subsystem holding both controllers.
For the fabrics case we see ctrl->cntlid has a more intricate relation
with the admin connect, so we didn't change that.
Fixes: 1b1031ca63 ("nvme: validate cntlid during controller initialisation")
Signed-off-by: Guilherme G. Piccoli <gpiccoli@canonical.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
nvme_state_set_live() making a path available triggers requeue_work
in order to resubmit requests that ended up on requeue_list when no
paths were available.
This requeue_work may race with concurrent nvme_ns_head_make_request()
that do not observe the live path yet.
Such concurrent requests may by made by either:
- New IO submission.
- Requeue_work triggered by nvme_failover_req() or another ana_work.
A race may cause requeue_work capture the state of requeue_list before
more requests get onto the list. These requests will stay on the list
forever unless requeue_work is triggered again.
In order to prevent such race, nvme_state_set_live() should
synchronize_srcu(&head->srcu) before triggering the requeue_work and
prevent nvme_ns_head_make_request referencing an old snapshot of the
path list.
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Anton Eidelman <anton@lightbitslabs.com>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
If a request issue ends up being punted to async context to avoid
blocking, we can get into a situation where the original application
enters the poll loop for that very request before it has been issued.
This should not be an issue, except that the polling will hold the
io_uring uring_ctx mutex for the duration of the poll. When the async
worker has actually issued the request, it needs to acquire this mutex
to add the request to the poll issued list. Since the application
polling is already holding this mutex, the workqueue sleeps on the
mutex forever, and the application thus never gets a chance to poll for
the very request it was interested in.
Fix this by ensuring that the polling drops the uring_ctx occasionally
if it's not making any progress.
Reported-by: Jeffrey M. Birnbaum <jmbnyc@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
In the case of X86_PAE, unsigned long is u32, but the physical address type
should be u64. Due to the bug here, the netvsc driver can not load
successfully, and sometimes the VM can panic due to memory corruption (the
hypervisor writes data to the wrong location).
Fixes: 6ba34171bc ("Drivers: hv: vmbus: Remove use of slow_virt_to_phys()")
Cc: stable@vger.kernel.org
Cc: Michael Kelley <mikelley@microsoft.com>
Reported-and-tested-by: Juliana Rodrigueiro <juliana.rodrigueiro@intra2net.com>
Signed-off-by: Dexuan Cui <decui@microsoft.com>
Reviewed-by: Michael Kelley <mikelley@microsoft.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
When building hv_kvp_daemon GCC-8.3 complains:
hv_kvp_daemon.c: In function ‘kvp_get_ip_info.constprop’:
hv_kvp_daemon.c:812:30: warning: ‘ip_buffer’ may be used uninitialized in this function [-Wmaybe-uninitialized]
struct hv_kvp_ipaddr_value *ip_buffer;
this seems to be a false positive: we only use ip_buffer when
op == KVP_OP_GET_IP_INFO and it is only unset when op == KVP_OP_ENUMERATE.
Silence the warning by initializing ip_buffer to NULL.
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Simplify the ring buffer handling with the in-place API.
Also avoid the dynamic allocation and the memory leak in the channel
callback function.
Signed-off-by: Dexuan Cui <decui@microsoft.com>
Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This field is no longer used after the commit
63ed4e0c67 ("Drivers: hv: vmbus: Consolidate all Hyper-V specific clocksource code")
, because it's replaced by the global variable
"struct ms_hyperv_tsc_page *tsc_pg;" (now, the variable is in
drivers/clocksource/hyperv_timer.c).
Fixes: 63ed4e0c67 ("Drivers: hv: vmbus: Consolidate all Hyper-V specific clocksource code")
Signed-off-by: Dexuan Cui <decui@microsoft.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
The static structures ht16k33_fb_fix and ht16k33_fb_var, of types
fb_fix_screeninfo and fb_var_screeninfo respectively, are not used
except to be copied into other variables. Hence make both of them
constant to prevent unintended modification.
Issue found with
Coccinelle.
Acked-by: Robin van der Gracht <robin@protonic.nl>
Signed-off-by: Nishka Dasgupta <nishkadg.linux@gmail.com>
Signed-off-by: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>
The EKR ring claims a range of 0 to 71 but actually reports
values 1 to 72. The ring is used in relative mode so this
change should not affect users.
Signed-off-by: Aaron Armstrong Skomra <aaron.skomra@wacom.com>
Fixes: 72b236d602 ("HID: wacom: Add support for Express Key Remote.")
Cc: <stable@vger.kernel.org> # v4.3+
Reviewed-by: Ping Cheng <ping.cheng@wacom.com>
Reviewed-by: Jason Gerecke <jason.gerecke@wacom.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
We need to provide the arch hooks for non-coherent dma-direct
and swiotlb for all swiotlb builds, not just when LPAS is enabled.
Without that the Xen build that selects SWIOTLB indirectly through
SWIOTLB_XEN fails to build.
Fixes: ad3c7b18c5 ("arm: use swiotlb for bounce buffering on LPAE configs")
Reported-by: Stefan Wahren <wahrenst@gmx.net>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Tested-by: Stefan Wahren <wahrenst@gmx.net>
When SCSI-MQ is enabled, the SCSI-MQ layers will do pre-allocation of MQ
resources based on shost values set by the driver. In newer cases of the
driver, which attempts to set nr_hw_queues to the cpu count, the
multipliers become excessive, with a single shost having SCSI-MQ
pre-allocation reaching into the multiple GBytes range. NPIV, which
creates additional shosts, only multiply this overhead. On lower-memory
systems, this can exhaust system memory very quickly, resulting in a system
crash or failures in the driver or elsewhere due to low memory conditions.
After testing several scenarios, the situation can be mitigated by limiting
the value set in shost->nr_hw_queues to 4. Although the shost values were
changed, the driver still had per-cpu hardware queues of its own that
allowed parallelization per-cpu. Testing revealed that even with the
smallish number for nr_hw_queues for SCSI-MQ, performance levels remained
near maximum with the within-driver affiinitization.
A module parameter was created to allow the value set for the nr_hw_queues
to be tunable.
Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>
Reviewed-by: Ming Lei <ming.lei@redhat.com>
Reviewed-by: Ewan D. Milne <emilne@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
The parens used in the while loop would result in error being assigned
the value 1 rather than the intended errno value.
This is required to return -ETXTBSY from follow on break_layout()
changes.
Signed-off-by: Ira Weiny <ira.weiny@intel.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
handful of samsung clk driver fixes for audio and display clks, and a
small fix for the Stratix10 SoC driver that was checking the wrong
register for validity.
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Merge tag 'clk-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux
Pull clk fixes from Stephen Boyd:
"A couple fixes to the core framework logic that finds clk parents, a
handful of samsung clk driver fixes for audio and display clks, and a
small fix for the Stratix10 SoC driver that was checking the wrong
register for validity"
* tag 'clk-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux:
clk: Fix potential NULL dereference in clk_fetch_parent_index()
clk: Fix falling back to legacy parent string matching
clk: socfpga: stratix10: fix rate caclulationg for cnt_clks
clk: samsung: exynos542x: Move MSCL subsystem clocks to its sub-CMU
clk: samsung: exynos5800: Move MAU subsystem clocks to MAU sub-CMU
clk: samsung: Change signature of exynos5_subcmus_init() function
Pull kernel thread signal handling fix from Eric Biederman:
"I overlooked the fact that kernel threads are created with all signals
set to SIG_IGN, and accidentally caused a regression in cifs and drbd
when replacing force_sig with send_sig.
This is my fix for that regression. I add a new function
allow_kernel_signal which allows kernel threads to receive signals
sent from the kernel, but continues to ignore all signals sent from
userspace. This ensures the user space interface for cifs and drbd
remain the same.
These kernel threads depend on blocking networking calls which block
until something is received or a signal is pending. Making receiving
of signals somewhat necessary for these kernel threads.
Perhaps someday we can cleanup those interfaces and remove
allow_kernel_signal. If not allow_kernel_signal is pretty trivial and
clearly documents what is going on so I don't think we will mind
carrying it"
* 'siginfo-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace:
signal: Allow cifs and drbd to receive their terminating signals
If alloc_descs() fails before irq_sysfs_init() has run, free_desc() in the
cleanup path will call kobject_del() even though the kobject has not been
added with kobject_add().
Fix this by making the call to kobject_del() conditional on whether
irq_sysfs_init() has run.
This problem surfaced because commit aa30f47cf6 ("kobject: Add support
for default attribute groups to kobj_type") makes kobject_del() stricter
about pairing with kobject_add(). If the pairing is incorrrect, a WARNING
and backtrace occur in sysfs_remove_group() because there is no parent.
[ tglx: Add a comment to the code and make it work with CONFIG_SYSFS=n ]
Fixes: ecb3f394c5 ("genirq: Expose interrupt information through sysfs")
Signed-off-by: Michael Kelley <mikelley@microsoft.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: stable@vger.kernel.org
Link: https://lkml.kernel.org/r/1564703564-4116-1-git-send-email-mikelley@microsoft.com
There have been reports of RDRAND issues after resuming from suspend on
some AMD family 15h and family 16h systems. This issue stems from a BIOS
not performing the proper steps during resume to ensure RDRAND continues
to function properly.
RDRAND support is indicated by CPUID Fn00000001_ECX[30]. This bit can be
reset by clearing MSR C001_1004[62]. Any software that checks for RDRAND
support using CPUID, including the kernel, will believe that RDRAND is
not supported.
Update the CPU initialization to clear the RDRAND CPUID bit for any family
15h and 16h processor that supports RDRAND. If it is known that the family
15h or family 16h system does not have an RDRAND resume issue or that the
system will not be placed in suspend, the "rdrand=force" kernel parameter
can be used to stop the clearing of the RDRAND CPUID bit.
Additionally, update the suspend and resume path to save and restore the
MSR C001_1004 value to ensure that the RDRAND CPUID setting remains in
place after resuming from suspend.
Note, that clearing the RDRAND CPUID bit does not prevent a processor
that normally supports the RDRAND instruction from executing it. So any
code that determined the support based on family and model won't #UD.
Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: Andrew Cooper <andrew.cooper3@citrix.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Chen Yu <yu.c.chen@intel.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Juergen Gross <jgross@suse.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: "linux-doc@vger.kernel.org" <linux-doc@vger.kernel.org>
Cc: "linux-pm@vger.kernel.org" <linux-pm@vger.kernel.org>
Cc: Nathan Chancellor <natechancellor@gmail.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>
Cc: <stable@vger.kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: "x86@kernel.org" <x86@kernel.org>
Link: https://lkml.kernel.org/r/7543af91666f491547bd86cebb1e17c66824ab9f.1566229943.git.thomas.lendacky@amd.com
Pull networking fixes from David Miller:
1) Fix jmp to 1st instruction in x64 JIT, from Alexei Starovoitov.
2) Severl kTLS fixes in mlx5 driver, from Tariq Toukan.
3) Fix severe performance regression due to lack of SKB coalescing of
fragments during local delivery, from Guillaume Nault.
4) Error path memory leak in sch_taprio, from Ivan Khoronzhuk.
5) Fix batched events in skbedit packet action, from Roman Mashak.
6) Propagate VLAN TX offload to hw_enc_features in bond and team
drivers, from Yue Haibing.
7) RXRPC local endpoint refcounting fix and read after free in
rxrpc_queue_local(), from David Howells.
8) Fix endian bug in ibmveth multicast list handling, from Thomas
Falcon.
9) Oops, make nlmsg_parse() wrap around the correct function,
__nlmsg_parse not __nla_parse(). Fix from David Ahern.
10) Memleak in sctp_scend_reset_streams(), fro Zheng Bin.
11) Fix memory leak in cxgb4, from Wenwen Wang.
12) Yet another race in AF_PACKET, from Eric Dumazet.
13) Fix false detection of retransmit failures in tipc, from Tuong
Lien.
14) Use after free in ravb_tstamp_skb, from Tho Vu.
* git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (101 commits)
ravb: Fix use-after-free ravb_tstamp_skb
netfilter: nf_tables: map basechain priority to hardware priority
net: sched: use major priority number as hardware priority
wimax/i2400m: fix a memory leak bug
net: cavium: fix driver name
ibmvnic: Unmap DMA address of TX descriptor buffers after use
bnxt_en: Fix to include flow direction in L2 key
bnxt_en: Use correct src_fid to determine direction of the flow
bnxt_en: Suppress HWRM errors for HWRM_NVM_GET_VARIABLE command
bnxt_en: Fix handling FRAG_ERR when NVM_INSTALL_UPDATE cmd fails
bnxt_en: Improve RX doorbell sequence.
bnxt_en: Fix VNIC clearing logic for 57500 chips.
net: kalmia: fix memory leaks
cx82310_eth: fix a memory leak bug
bnx2x: Fix VF's VLAN reconfiguration in reload.
Bluetooth: Add debug setting for changing minimum encryption key size
tipc: fix false detection of retransmit failures
lan78xx: Fix memory leaks
MAINTAINERS: r8169: Update path to the driver
MAINTAINERS: PHY LIBRARY: Update files in the record
...
The maximum key description size is 4095. Commit f771fde820 ("keys:
Simplify key description management") inadvertantly reduced that to 255
and made sizes between 256 and 4095 work weirdly, and any size whereby
size & 255 == 0 would cause an assertion in __key_link_begin() at the
following line:
BUG_ON(index_key->desc_len == 0);
This can be fixed by simply increasing the size of desc_len in struct
keyring_index_key to a u16.
Note the argument length test in keyutils only checked empty
descriptions and descriptions with a size around the limit (ie. 4095)
and not for all the values in between, so it missed this. This has been
addressed and
https://git.kernel.org/pub/scm/linux/kernel/git/dhowells/keyutils.git/commit/?id=066bf56807c26cd3045a25f355b34c1d8a20a5aa
now exhaustively tests all possible lengths of type, description and
payload and then some.
The assertion failure looks something like:
kernel BUG at security/keys/keyring.c:1245!
...
RIP: 0010:__key_link_begin+0x88/0xa0
...
Call Trace:
key_create_or_update+0x211/0x4b0
__x64_sys_add_key+0x101/0x200
do_syscall_64+0x5b/0x1e0
entry_SYSCALL_64_after_hwframe+0x44/0xa9
It can be triggered by:
keyctl add user "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" a @s
Fixes: f771fde820 ("keys: Simplify key description management")
Reported-by: kernel test robot <rong.a.chen@intel.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Gustavo A. R. Silva