redonkable/alistair23-linux
redonkable/alistair23-linux
1
0
Fork 0
Code Releases Activity
alistair23-linux/drivers/usb/host
History
Alan Stern 569b394f53 USB: EHCI: always scan each interrupt QH 
This patch (as1585) fixes a bug in ehci-hcd's scheme for scanning
interrupt QHs.

Currently a single routine takes care of scanning everything on the
periodic schedule.  Whenever an interrupt occurs, it scans all
isochronous and interrupt URBs scheduled for frames that have elapsed
since the last scan.

This has two disadvantages.  The first is relatively minor: An
interrupt QH is likely to end up getting scanned multiple times,
particularly if the last scan was not fairly recent.  (The current
code avoids this by maintaining a periodic_stamp in each interrupt
QH.)

The second is more serious.  The periodic schedule wraps around.  If
the last scan occurred during frame N, and the next scan occurs when
the schedule has gone through an entire cycle and is back at frame N,
the scanning code won't look at any frames other than N.  Consequently
it won't see any QHs that completed during frame N-1 or earlier.

The patch replaces the entire frame-based approach for scanning
interrupt QHs with a new routine using a list-based approach, the same
as for async QHs.  This has a slight disadvantage, because it means
that all interrupt QHs have to be scanned every time.  But it is more
robust than the current approach.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-07-16 16:56:47 -07:00
..
whci Merge branch 'for-next/dwc3' of git://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb into usb-next 2011-12-12 15:19:53 -08:00
alchemy-common.c MIPS: Alchemy: Au1300 SoC support 2011-12-07 22:02:05 +00:00
bcma-hcd.c usb/bcma: Add missing #include <linux/slab.h> 2012-04-23 13:22:00 -07:00
ehci-atmel.c EHCI: centralize controller initialization 2012-07-09 13:35:05 -07:00
ehci-au1xxx.c EHCI: centralize controller initialization 2012-07-09 13:35:05 -07:00
ehci-cns3xxx.c EHCI: centralize controller initialization 2012-07-09 13:35:05 -07:00
ehci-dbg.c USB: EHCI: add new root-hub state: STOPPING 2012-07-16 16:50:14 -07:00
ehci-fsl.c EHCI: centralize controller initialization 2012-07-09 13:35:05 -07:00
ehci-fsl.h fsl/usb: Add controller version based ULPI and UTMI phy support 2012-04-18 13:46:42 -07:00
ehci-grlib.c EHCI: centralize controller initialization 2012-07-09 13:35:05 -07:00
ehci-hcd.c USB: EHCI: always scan each interrupt QH 2012-07-16 16:56:47 -07:00
ehci-hub.c USB: EHCI: use hrtimer for unlinking empty async QHs 2012-07-16 16:56:47 -07:00
ehci-ixp4xx.c EHCI: centralize controller initialization 2012-07-09 13:35:05 -07:00
ehci-lpm.c
ehci-ls1x.c USB: Add EHCI bus glue for Loongson1x SoCs (UPDATED) 2012-01-24 15:28:02 -08:00
ehci-mem.c USB: EHCI: use hrtimer for (s)iTD deallocation 2012-07-16 16:54:25 -07:00
ehci-msm.c EHCI: centralize controller suspend/resume 2012-07-09 08:54:18 -07:00
ehci-mv.c EHCI: centralize controller initialization 2012-07-09 13:35:05 -07:00
ehci-mxc.c EHCI: centralize controller initialization 2012-07-09 13:35:05 -07:00
ehci-octeon.c EHCI: centralize controller initialization 2012-07-09 13:35:05 -07:00
ehci-omap.c EHCI: centralize controller initialization 2012-07-09 13:35:05 -07:00
ehci-orion.c EHCI: centralize controller initialization 2012-07-09 13:35:05 -07:00
ehci-pci.c USB: EHCI: use hrtimer for the periodic schedule 2012-07-16 16:53:16 -07:00
ehci-platform.c EHCI: centralize controller suspend/resume 2012-07-09 08:54:18 -07:00
ehci-pmcmsp.c EHCI: centralize controller initialization 2012-07-09 13:35:05 -07:00
ehci-ppc-of.c EHCI: centralize controller initialization 2012-07-09 13:35:05 -07:00
ehci-ps3.c EHCI: centralize controller initialization 2012-07-09 13:35:05 -07:00
ehci-q.c USB: EHCI: always scan each interrupt QH 2012-07-16 16:56:47 -07:00
ehci-s5p.c EHCI: centralize controller initialization 2012-07-09 13:35:05 -07:00
ehci-sched.c USB: EHCI: always scan each interrupt QH 2012-07-16 16:56:47 -07:00
ehci-sead3.c EHCI: centralize controller suspend/resume 2012-07-09 08:54:18 -07:00
ehci-sh.c EHCI: centralize controller initialization 2012-07-09 13:35:05 -07:00
ehci-spear.c EHCI: centralize controller initialization 2012-07-09 13:35:05 -07:00
ehci-sysfs.c
ehci-tegra.c EHCI: centralize controller initialization 2012-07-09 13:35:05 -07:00
ehci-timer.c USB: EHCI: always scan each interrupt QH 2012-07-16 16:56:47 -07:00
ehci-vt8500.c EHCI: centralize controller initialization 2012-07-09 13:35:05 -07:00
ehci-w90x900.c EHCI: centralize controller initialization 2012-07-09 13:35:05 -07:00
ehci-xilinx-of.c EHCI: centralize controller initialization 2012-07-09 13:35:05 -07:00
ehci-xls.c EHCI: centralize controller initialization 2012-07-09 13:35:05 -07:00
ehci.h USB: EHCI: always scan each interrupt QH 2012-07-16 16:56:47 -07:00
fhci-dbg.c USB: FHCI: Reusing QUICC Engine USB Controller registers from immap_qe.h 2012-06-26 19:42:11 -07:00
fhci-hcd.c USB: FHCI: Reusing QUICC Engine USB Controller registers from immap_qe.h 2012-06-26 19:42:11 -07:00
fhci-hub.c USB: FHCI: Reusing QUICC Engine USB Controller registers from immap_qe.h 2012-06-26 19:42:11 -07:00
fhci-mem.c
fhci-q.c
fhci-sched.c USB: FHCI: Reusing QUICC Engine USB Controller registers from immap_qe.h 2012-06-26 19:42:11 -07:00
fhci-tds.c USB: FHCI: Reusing QUICC Engine USB Controller registers from immap_qe.h 2012-06-26 19:42:11 -07:00
fhci.h USB: FHCI: Reusing QUICC Engine USB Controller registers from immap_qe.h 2012-06-26 19:42:11 -07:00
fsl-mph-dr-of.c fsl/usb: Add controller version based ULPI and UTMI phy support 2012-04-18 13:46:42 -07:00
hwa-hc.c Merge branch 'usb-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb 2012-01-09 12:09:47 -08:00
imx21-dbg.c usb: Fix typo in imx21-dbg.c 2012-02-13 14:32:34 -08:00
imx21-hcd.c usb: imx21-hcd.c: Use clk_prepare_enable/clk_disable_unprepare 2012-06-12 13:31:03 +03:00
imx21-hcd.h
isp116x-hcd.c Remove all #inclusions of asm/system.h 2012-03-28 18:30:03 +01:00
isp116x.h
isp1362-hcd.c Remove all #inclusions of asm/system.h 2012-03-28 18:30:03 +01:00
isp1362.h
isp1760-hcd.c isp1760-hcd: fix possible memory leak if urb could not be enqueued 2012-04-18 13:51:19 -07:00
isp1760-hcd.h usb/isp1760: Allow to optionally trigger low-level chip reset via GPIOLIB. 2011-10-19 13:29:06 -07:00
isp1760-if.c isp1760-if: make module unloads correctly 2012-04-18 13:50:44 -07:00
Kconfig usb: correct trivial typo in drivers/usb/host/Kconfig 2012-06-15 15:05:34 -07:00
Makefile USB: Add driver for the ssb bus 2012-04-18 13:43:30 -07:00
octeon2-common.c
ohci-at91.c USB: ohci-at91: add a reset function to fix race condition 2012-05-09 15:22:27 -07:00
ohci-au1xxx.c usb: [MIPS] fix unresolved err() reference in host/ohci-au1xxx.c 2012-05-01 18:36:09 -04:00
ohci-cns3xxx.c USB: ohci-cns3xxx.c: remove err() usage 2012-04-27 11:24:40 -07:00
ohci-da8xx.c ohci-da8xx: set MODULE_ALIAS to allow autoloading 2012-05-08 09:26:10 -07:00
ohci-dbg.c USB: ohci-dbg.c: remove dbg() usage 2012-05-01 21:33:37 -07:00
ohci-ep93xx.c USB: ohci-ep93xx.c: remove dbg() usage 2012-05-01 21:33:38 -07:00
ohci-exynos.c USB: ohci-exynos: use devm_ functions 2012-07-06 10:42:21 -07:00
ohci-hcd.c USB: OHCI: remove old SSB OHCI driver 2012-04-18 13:43:30 -07:00
ohci-hub.c USB: ohci-hub: Mark ohci_finish_controller_resume() as __maybe_unused 2012-06-13 17:26:11 -07:00
ohci-jz4740.c
ohci-mem.c
ohci-nxp.c USB: ohci-nxp: add usbd and otg clock initialization 2012-06-20 16:20:24 -07:00
ohci-octeon.c
ohci-omap.c usb: phy: patches for v3.6 merge window 2012-07-05 15:35:41 -07:00
ohci-omap3.c ARM: OMAP: USBHOST: Replace usbhs core driver APIs by Runtime pm APIs 2011-12-16 04:29:57 -07:00
ohci-pci.c usb: add support for STA2X11 host driver 2012-01-24 14:15:37 -08:00
ohci-platform.c usb: Fix various typo within usb 2012-04-18 13:57:26 -07:00
ohci-pnx8550.c usb: [MIPS] fix unresolved err() reference in host/ohci-pnx8550.c 2012-05-01 18:36:09 -04:00
ohci-ppc-of.c USB: ohci-ppc-of.c: remove err() usage 2012-04-27 11:24:42 -07:00
ohci-ppc-soc.c USB: ohci-ppc-soc.c: remove err() usage 2012-04-27 11:24:42 -07:00
ohci-ps3.c USB: ohci-ps3.c: remove err() usage 2012-04-27 11:24:43 -07:00
ohci-pxa27x.c usb: [ARM] fix unresolved err() reference in host/ohci-pxa27x.c 2012-05-01 18:36:09 -04:00
ohci-q.c OHCI: remove uses of hcd->state 2011-11-18 10:51:00 -08:00
ohci-s3c2410.c USB: ohci-s3c2410.c: remove err() usage 2012-04-27 11:24:43 -07:00
ohci-sa1111.c USB: ohci-sa1111.c: remove dbg() usage 2012-05-01 21:33:39 -07:00
ohci-sh.c USB: ohci-sh.c: remove err() usage 2012-04-27 11:24:44 -07:00
ohci-sm501.c OHCI: remove uses of hcd->state 2011-11-18 10:51:00 -08:00
ohci-spear.c USB: ehci: ohci: Add clk_{un}prepare() support 2012-04-18 14:33:43 -07:00
ohci-tmio.c USB: ohci-tmio.c: remove err() usage 2012-04-27 11:24:44 -07:00
ohci-xls.c USB: ohci-xls.c: remove err() usage 2012-04-27 11:24:45 -07:00
ohci.h USB: move transceiver from ehci_hcd and ohci_hcd to hcd and rename it as phy 2012-06-13 12:38:36 -07:00
oxu210hp-hcd.c USB: oxu210hp-hcd.c: remove dbg() usage 2012-05-01 21:33:43 -07:00
oxu210hp.h
pci-quirks.c xhci: Add Lynx Point to list of Intel switchable hosts. 2012-05-03 13:18:40 -07:00
pci-quirks.h
r8a66597-hcd.c Revert "usb: move struct usb_device->children to struct usb_hub_port->child" 2012-05-14 09:20:37 -07:00
r8a66597.h
sl811-hcd.c Remove all #inclusions of asm/system.h 2012-03-28 18:30:03 +01:00
sl811.h
sl811_cs.c
ssb-hcd.c usb/ssb: Add missing #include <linux/slab.h> 2012-04-23 13:22:00 -07:00
u132-hcd.c Remove all #inclusions of asm/system.h 2012-03-28 18:30:03 +01:00
uhci-debug.c
uhci-grlib.c
uhci-hcd.c Remove all #inclusions of asm/system.h 2012-03-28 18:30:03 +01:00
uhci-hcd.h
uhci-hub.c UHCI: hub_status_data should indicate if ports are resuming 2012-04-09 15:43:21 -07:00
uhci-pci.c
uhci-q.c usb: fix number of mapped SG DMA entries 2011-12-09 16:18:19 -08:00
xhci-dbg.c xHCI: correct to print the true HSEE of USBCMD 2012-04-10 15:21:52 -07:00
xhci-ext-caps.h xHCI: Correct the #define XHCI_LEGACY_DISABLE_SMI 2012-04-11 08:31:06 -07:00
xhci-hub.c usb: Add support for root hub port status CAS 2012-07-02 12:51:24 -07:00
xhci-mem.c xhci: Don't free endpoints in xhci_mem_cleanup() 2012-06-13 16:37:30 -07:00
xhci-pci.c xhci: Add Intel U1/U2 timeout policy. 2012-05-18 15:42:04 -07:00
xhci-plat.c usb: host: xhci: add platform driver support 2012-03-13 10:30:59 -07:00
xhci-ring.c xhci: Fix hang on back-to-back Set TR Deq Ptr commands. 2012-07-02 12:51:25 -07:00
xhci.c usbdevfs: Add a USBDEVFS_GET_CAPABILITIES ioctl 2012-07-06 10:53:19 -07:00
xhci.h usb: Add support for root hub port status CAS 2012-07-02 12:51:24 -07:00