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linux/drivers/usb/host
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Alan Stern fc0855f274 USB: EHCI: warn on unexpectedly active QH 
This patch adds a new warning message to ehci-hcd.  The warning is
triggered whenever the driver finds that the hardware has set the
Active bit in a QH at a time when the driver expects the QH to be
completely idle.  Such bugs have been observed by users in the past,
and since they can lead to serious problems (such as inability to
unlink an URB that never completes), it would be good to know about
them when they occur.

This won't fix these bugs; that's a bigger job for a later patch.  But
success isn't guaranteed, since this depends on aspects of the
hardware which are not documented in the EHCI spec or for which the
spec's recommendations are clearly unworkable.  It therefore seems
worthwhile to check for these bugs proactively.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Reported-by: Michael Reutman <mreutman@epiqsolutions.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-12-01 10:44:19 -08:00
..
whci whci: drop null test before destroy functions 2015-10-04 10:38:33 +01:00
bcma-hcd.c USB: bcma: add support for controlling bus power through GPIO 2015-07-22 15:43:34 -07:00
ehci-atmel.c USB: ehci-atmel: rework clk handling 2015-03-18 13:28:35 +01:00
ehci-dbg.c USB: EHCI: enhance "async" debugfs output 2015-12-01 10:44:19 -08:00
ehci-exynos.c Driver core patches for 3.19-rc1 2014-12-14 16:10:09 -08:00
ehci-fsl.c drivers: usb: fsl: Workaround for USB erratum-A005275 2015-08-14 16:50:36 -07:00
ehci-fsl.h drivers: usb: fsl: Define usb control register mask for w1c bits 2015-07-22 16:44:35 -07:00
ehci-grlib.c usb: host: drop owner assignment from platform_drivers 2015-01-09 12:31:53 -08:00
ehci-hcd.c dma: remove external references to dma_supported 2015-11-09 15:11:24 -08:00
ehci-hub.c drivers: usb: fsl: Workaround for USB erratum-A005275 2015-08-14 16:50:36 -07:00
ehci-mem.c
ehci-msm.c usb: host: ehci-msm: fix handling platform_get_irq result 2015-10-04 10:59:03 +01:00
ehci-mv.c host: ehci-mv: remove duplicate check on resource 2014-11-07 09:01:50 -08:00
ehci-mxc.c host: ehci-mxc: remove duplicate check on resource 2014-11-07 09:01:50 -08:00
ehci-omap.c
ehci-orion.c usb: ehci-orion: fix probe for !GENERIC_PHY 2015-10-04 10:45:08 +01:00
ehci-pci.c ehci-pci: disable for Intel MID platforms (update) 2015-02-03 15:28:31 -08:00
ehci-platform.c USB: ehci-platform: Add ACPI bindings for the EHCI platform driver. 2015-10-04 10:47:13 +01:00
ehci-pmcmsp.c usb: host: drop owner assignment from platform_drivers 2015-01-09 12:31:53 -08:00
ehci-ppc-of.c usb: host: drop owner assignment from platform_drivers 2015-01-09 12:31:53 -08:00
ehci-ps3.c
ehci-q.c USB: EHCI: warn on unexpectedly active QH 2015-12-01 10:44:19 -08:00
ehci-sched.c USB: EHCI: adjust error return code 2015-01-09 09:58:49 -08:00
ehci-sead3.c usb: host: drop owner assignment from platform_drivers 2015-01-09 12:31:53 -08:00
ehci-sh.c usb: host: drop owner assignment from platform_drivers 2015-01-09 12:31:53 -08:00
ehci-spear.c usb: host: ehci-spear: Fix module autoload for OF platform driver 2015-10-04 10:51:58 +01:00
ehci-st.c usb: host: ehci-st: Simplify return statement 2015-08-05 12:37:21 -07:00
ehci-sysfs.c usb: host: ehci-sys: delete useless bus_to_hcd conversion 2015-08-18 10:05:23 -07:00
ehci-tegra.c USB: ehci-tegra: fix inefficient copy of unaligned buffers 2015-05-08 01:43:44 +02:00
ehci-tilegx.c usb: host: drop owner assignment from platform_drivers 2015-01-09 12:31:53 -08:00
ehci-timer.c
ehci-w90x900.c Driver core patches for 3.19-rc1 2014-12-14 16:10:09 -08:00
ehci-xilinx-of.c usb: host: drop owner assignment from platform_drivers 2015-01-09 12:31:53 -08:00
ehci.h USB: EHCI: warn on unexpectedly active QH 2015-12-01 10:44:19 -08:00
fhci-dbg.c
fhci-hcd.c
fhci-hub.c fhci-hub: use USB_DT_HUB 2015-04-03 19:03:19 +02:00
fhci-mem.c
fhci-q.c
fhci-sched.c
fhci-tds.c
fhci.h
fotg210-hcd.c dma: remove external references to dma_supported 2015-11-09 15:11:24 -08:00
fotg210.h usb/host/fotg210: Fix coding style issues 2015-10-16 23:46:22 -07:00
fsl-mph-dr-of.c usb: host: fsl-mph-dr-of: Fix module autoload for OF platform driver 2015-10-04 10:51:58 +01:00
hwa-hc.c USB: HWA: fix a warning message 2014-11-03 15:26:15 -08:00
imx21-dbg.c
imx21-hcd.c imx21-hcd: use USB_DT_HUB 2015-04-03 19:03:18 +02:00
imx21-hcd.h
isp116x-hcd.c USB: isp116x-hcd.c: move assignment out of if () block 2015-05-10 16:01:11 +02:00
isp116x.h
isp1362-hcd.c isp1362-hcd: use USB_DT_HUB 2015-04-03 19:03:18 +02:00
isp1362.h
Kconfig usb-host: Remove fusbh200 driver 2015-10-16 23:44:33 -07:00
Makefile usb-host: Remove fusbh200 driver 2015-10-16 23:44:33 -07:00
max3421-hcd.c spi: Drop owner assignment from spi_drivers 2015-10-28 10:30:17 +09:00
ohci-at91.c USB: host: ohci-at91: merge loops in ohci_hcd_at91_drv_probe 2015-08-14 16:57:43 -07:00
ohci-da8xx.c usb: host: drop owner assignment from platform_drivers 2015-01-09 12:31:53 -08:00
ohci-dbg.c USB: ohci-dbg.c: move assignment out of if () block 2015-05-10 16:01:11 +02:00
ohci-exynos.c Driver core patches for 3.19-rc1 2014-12-14 16:10:09 -08:00
ohci-hcd.c USB: ohci-hcd.c: move assignment out of if () block 2015-05-10 16:01:11 +02:00
ohci-hub.c ohci-hub: use USB_DT_HUB 2015-04-03 19:03:17 +02:00
ohci-jz4740.c usb: host: drop owner assignment from platform_drivers 2015-01-09 12:31:53 -08:00
ohci-mem.c
ohci-nxp.c usb: host: lpc32xx: don't unregister phy device 2015-10-24 19:53:53 -07:00
ohci-omap.c Driver core patches for 3.19-rc1 2014-12-14 16:10:09 -08:00
ohci-omap3.c
ohci-pci.c
ohci-platform.c usb: ohci-platform: Use devm_of_phy_get_by_index 2015-05-11 21:42:25 +05:30
ohci-ppc-of.c usb: host: drop owner assignment from platform_drivers 2015-01-09 12:31:53 -08:00
ohci-ps3.c
ohci-pxa27x.c Driver core patches for 3.19-rc1 2014-12-14 16:10:09 -08:00
ohci-q.c USB: OHCI: Fix race between ED unlink and URB submission 2015-07-22 14:46:50 -07:00
ohci-s3c2410.c ohci-s3c2410: use HUB_CHAR_* 2015-01-25 21:01:13 +08:00
ohci-sa1111.c
ohci-sm501.c usb: host: drop owner assignment from platform_drivers 2015-01-09 12:31:53 -08:00
ohci-spear.c usb: host: ohci-spear: Fix module autoload for OF platform driver 2015-10-04 10:51:58 +01:00
ohci-st.c
ohci-tilegx.c usb: host: drop owner assignment from platform_drivers 2015-01-09 12:31:53 -08:00
ohci-tmio.c USB: OHCI: fix bad #define in ohci-tmio.c 2015-07-22 14:49:42 -07:00
ohci.h USB: OHCI: Eliminate platform-specific test in ohci.h 2014-11-03 15:38:17 -08:00
oxu210hp-hcd.c dma: remove external references to dma_supported 2015-11-09 15:11:24 -08:00
oxu210hp.h
pci-quirks.c usb: host: pci_quirks: joing string literals 2015-01-31 09:05:06 -08:00
pci-quirks.h
r8a66597-hcd.c usb: generic resume timeout for v4.1 2015-04-10 13:45:27 +02:00
r8a66597.h
sl811-hcd.c usb: generic resume timeout for v4.1 2015-04-10 13:45:27 +02:00
sl811.h
sl811_cs.c
ssb-hcd.c USB: ssb: use devm_kzalloc 2015-06-08 14:26:22 -07:00
u132-hcd.c mm, page_alloc: distinguish between being unable to sleep, unwilling to sleep and avoiding waking kswapd 2015-11-06 17:50:42 -08:00
uhci-debug.c
uhci-grlib.c usb: host: drop owner assignment from platform_drivers 2015-01-09 12:31:53 -08:00
uhci-hcd.c
uhci-hcd.h
uhci-hub.c usb: generic resume timeout for v4.1 2015-04-10 13:45:27 +02:00
uhci-pci.c
uhci-platform.c usb: host: uhci-platform: Fix module autoload for OF platform driver 2015-10-04 10:51:58 +01:00
uhci-q.c
xhci-dbg.c xhci: Read and parse new xhci 1.1 capability register 2015-10-04 10:34:17 +01:00
xhci-ext-caps.h
xhci-hub.c xhci: Fix a race in usb2 LPM resume, blocking U3 for usb2 devices 2015-11-18 09:24:41 -08:00
xhci-mem.c xhci: drop null test before destroy functions 2015-10-04 10:38:33 +01:00
xhci-mvebu.c
xhci-mvebu.h
xhci-pci.c Merge 4.3-rc7 into usb-next 2015-10-26 06:39:46 +09:00
xhci-plat.c usb: Add support for ACPI identification to xhci-platform 2015-10-16 23:34:22 -07:00
xhci-rcar.c
xhci-rcar.h
xhci-ring.c usb: xhci: fix checking ep busy for CFC 2015-11-18 09:24:41 -08:00
xhci-trace.c
xhci-trace.h tracing: Add TRACE_SYSTEM_VAR to xhci-hcd 2015-04-07 12:31:55 -04:00
xhci.c xhci: Workaround to get Intel xHCI reset working more reliably 2015-11-18 09:24:41 -08:00
xhci.h asm-generic cleanups 2015-11-06 14:22:15 -08:00