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Selvin Xavier 3c4b1419c3 RDMA/bnxt_re: Fix system hang when registration with L2 driver fails 
Driver doesn't release rtnl lock if registration with
L2 driver (bnxt_re_register_netdev) fais and this causes
hang while requesting for the next lock.

[  371.635416] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[  371.635417] kworker/u48:1   D    0   634      2 0x80000000
[  371.635423] Workqueue: bnxt_re bnxt_re_task [bnxt_re]
[  371.635424] Call Trace:
[  371.635426]  ? __schedule+0x36b/0xbd0
[  371.635429]  schedule+0x39/0x90
[  371.635430]  schedule_preempt_disabled+0x11/0x20
[  371.635431]  __mutex_lock+0x45b/0x9c0
[  371.635433]  ? __mutex_lock+0x16d/0x9c0
[  371.635435]  ? bnxt_re_ib_reg+0x2b/0xb30 [bnxt_re]
[  371.635438]  ? wake_up_klogd+0x37/0x40
[  371.635442]  bnxt_re_ib_reg+0x2b/0xb30 [bnxt_re]
[  371.635447]  bnxt_re_task+0xfd/0x180 [bnxt_re]
[  371.635449]  process_one_work+0x216/0x5b0
[  371.635450]  ? process_one_work+0x189/0x5b0
[  371.635453]  worker_thread+0x4e/0x3d0
[  371.635455]  kthread+0x10e/0x140
[  371.635456]  ? process_one_work+0x5b0/0x5b0
[  371.635458]  ? kthread_stop+0x220/0x220
[  371.635460]  ret_from_fork+0x3a/0x50
[  371.635477] INFO: task NetworkManager:1228 blocked for more than 120 seconds.
[  371.635478]       Tainted: G    B      OE     4.20.0-rc1+ #42
[  371.635479] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.

Release the rtnl_lock correctly in the failure path.

Fixes: de5c95d0f5 ("RDMA/bnxt_re: Fix system crash during RDMA resource initialization")
Signed-off-by: Selvin Xavier <selvin.xavier@broadcom.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
 		2018-11-21 14:11:04 -07:00
Documentation This pull request contains updates for UBIFS: 2018-11-04 14:46:04 -08:00
LICENSES This is a fairly typical cycle for documentation. There's some welcome 2018-10-24 18:01:11 +01:00
arch Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2018-11-03 18:25:17 -07:00
block for-linus-20181102 2018-11-02 11:25:48 -07:00
certs export.h: remove VMLINUX_SYMBOL() and VMLINUX_SYMBOL_STR() 2018-08-22 23:21:44 +09:00
crypto KEYS: asym_tpm: Add support for the sign operation [ver #2] 2018-10-26 09:30:47 +01:00
drivers RDMA/bnxt_re: Fix system hang when registration with L2 driver fails 2018-11-21 14:11:04 -07:00
firmware kbuild: remove all dummy assignments to obj- 2017-11-18 11:46:06 +09:00
fs This pull request contains updates for UBIFS: 2018-11-04 14:46:04 -08:00
include net/mlx5: Fix XRC SRQ umem valid bits 2018-11-07 09:31:12 +02:00
init memblock: stop using implicit alignment to SMP_CACHE_BYTES 2018-10-31 08:54:16 -07:00
ipc ipc: IPCMNI limit check for semmni 2018-10-31 08:54:14 -07:00
kernel Merge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2018-11-03 18:37:09 -07:00
lib Merge branch 'work.afs' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2018-11-01 19:58:52 -07:00
mm memory_hotplug: cond_resched in __remove_pages 2018-11-03 10:09:38 -07:00
net NFS client bugfixes for Linux 4.20 2018-11-04 08:20:09 -08:00
samples VFIO updates for v4.20 2018-10-31 11:01:38 -07:00
scripts Kbuild updates for v4.20 (2nd) 2018-11-03 10:47:33 -07:00
security + Features/Improvements 2018-11-02 10:04:26 -07:00
sound sound fixes for 4.20-rc1 2018-11-02 11:02:52 -07:00
tools Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2018-11-03 18:25:17 -07:00
usr initramfs: move gen_initramfs_list.sh from scripts/ to usr/ 2018-08-22 23:21:44 +09:00
virt Revert "mm, mmu_notifier: annotate mmu notifiers with blockable invalidate callbacks" 2018-10-26 16:25:19 -07:00
.clang-format page cache: Convert find_get_pages_contig to XArray 2018-10-21 10:46:34 -04:00
.cocciconfig scripts: add Linux .cocciconfig for coccinelle 2016-07-22 12:13:39 +02:00
.get_maintainer.ignore
…
.gitattributes .gitattributes: set git diff driver for C source code files 2016-10-07 18:46:30 -07:00
.gitignore Kbuild updates for v4.17 (2nd) 2018-04-15 17:21:30 -07:00
.mailmap .mailmap: add Oleksij Rempel 2018-10-31 08:54:12 -07:00
COPYING COPYING: use the new text with points to the license files 2018-03-23 12:41:45 -06:00
CREDITS 9p: remove Ron Minnich from MAINTAINERS 2018-08-17 16:20:26 -07:00
Kbuild Kbuild updates for v4.15 2017-11-17 17:45:29 -08:00
Kconfig kconfig: move the "Executable file formats" menu to fs/Kconfig.binfmt 2018-08-02 08:06:55 +09:00
MAINTAINERS The Compiler Attributes series 2018-11-01 18:34:46 -07:00
Makefile Linux 4.20-rc1 2018-11-04 15:37:52 -08:00
README Drop all 00-INDEX files from Documentation/ 2018-09-09 15:08:58 -06:00

README 

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.