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linux-imx/drivers/usb/host
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Mathias Nyman 9fcd0da449 xhci: fix deadlock at host remove by running watchdog correctly 
commit d6169d0409 upstream.

If a URB is killed while the host is removed we can end up in a situation
where the hub thread takes the roothub device lock, and waits for
the URB to be given back by xhci-hcd, blocking the host remove code.

xhci-hcd tries to stop the endpoint and give back the urb, but can't
as the host is removed from PCI bus at the same time, preventing the normal
way of giving back urb.

Instead we need to rely on the stop command timeout function to give back
the urb. This xhci_stop_endpoint_command_watchdog() timeout function
used a XHCI_STATE_DYING flag to indicate if the timeout function is already
running, but later this flag has been taking into use in other places to
mark that xhci is dying.

Remove checks for XHCI_STATE_DYING in xhci_urb_dequeue. We are still
checking that reading from pci state does not return 0xffffffff or that
host is not halted before trying to stop the endpoint.

This whole area of stopping endpoints, giving back URBs, and the wathdog
timeout need rework, this fix focuses on solving a specific deadlock
issue that we can then send to stable before any major rework.

Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
[bwh: Backported to 3.2: the checks look slightly different]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
2017-03-16 02:18:43 +00:00
..
whci USB: whci-hcd: add check for dma mapping error 2015-12-30 02:25:59 +00:00
alchemy-common.c MIPS: Alchemy: abstract USB block control register access 2011-10-24 23:34:23 +01:00
ehci-ath79.c USB: irq: Remove IRQF_DISABLED 2011-09-18 01:39:36 -07:00
ehci-atmel.c USB: EHCI: Support controllers with big endian capability regs 2011-05-03 11:43:21 -07:00
ehci-au1xxx.c Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2011-11-03 13:28:14 -07:00
ehci-cns3xxx.c treewide: Convert uses of struct resource to resource_size(ptr) 2011-06-10 14:55:36 +02:00
ehci-dbg.c EHCI: workaround for MosChip controller bug 2011-10-18 13:49:33 -07:00
ehci-fsl.c drivers: usb: fsl: Workaround for USB erratum-A005275 2015-10-13 03:46:05 +01:00
ehci-fsl.h powerpc/usb: fix bug of kernel hang when initializing usb 2012-04-02 09:52:10 -07:00
ehci-grlib.c treewide: Convert uses of struct resource to resource_size(ptr) 2011-06-10 14:55:36 +02:00
ehci-hcd.c usb: ehci: fix deadlock when threadirqs option is used 2014-04-02 00:58:56 +01:00
ehci-hub.c drivers: usb: fsl: Workaround for USB erratum-A005275 2015-10-13 03:46:05 +01:00
ehci-ixp4xx.c treewide: Convert uses of struct resource to resource_size(ptr) 2011-06-10 14:55:36 +02:00
ehci-lpm.c USB: Mark EHCI LPM functions as __maybe_unused 2011-02-17 10:47:55 -08:00
ehci-mem.c USB: EHCI: AMD periodic frame list table quirk 2010-11-16 13:36:40 -08:00
ehci-msm.c ehci-msm : use ehci_setup 2011-07-08 14:51:29 -07:00
ehci-mxc.c usb: ehci-mxc: check for pdata before dereferencing 2013-10-26 21:05:59 +01:00
ehci-octeon.c USB: irq: Remove IRQF_DISABLED 2011-09-18 01:39:36 -07:00
ehci-omap.c USB: ehci-omap: Fix autoloading of module 2013-03-06 03:24:00 +00:00
ehci-orion.c USB: irq: Remove IRQF_DISABLED 2011-09-18 01:39:36 -07:00
ehci-pci.c USB: fix PM config symbol in uhci-hcd, ehci-hcd, and xhci-hcd 2013-10-26 21:06:06 +01:00
ehci-pmcmsp.c treewide: Convert uses of struct resource to resource_size(ptr) 2011-06-10 14:55:36 +02:00
ehci-ppc-of.c treewide: Convert uses of struct resource to resource_size(ptr) 2011-06-10 14:55:36 +02:00
ehci-ps3.c USB: irq: Remove IRQF_DISABLED 2011-09-18 01:39:36 -07:00
ehci-pxa168.c USB: pxa168: Fix compilation error 2012-01-12 11:29:40 -08:00
ehci-q.c USB: EHCI: bugfix: urb->hcpriv should not be NULL 2013-01-03 03:33:04 +00:00
ehci-s5p.c USB: irq: Remove IRQF_DISABLED 2011-09-18 01:39:36 -07:00
ehci-sched.c USB: revert periodic scheduling bugfix 2013-06-19 02:16:49 +01:00
ehci-sh.c USB: irq: Remove IRQF_DISABLED 2011-09-18 01:39:36 -07:00
ehci-spear.c USB: irq: Remove IRQF_DISABLED 2011-09-18 01:39:36 -07:00
ehci-sysfs.c usb: host: ehci-sys: delete useless bus_to_hcd conversion 2015-10-13 03:46:06 +01:00
ehci-tegra.c USB: irq: Remove IRQF_DISABLED 2011-09-18 01:39:36 -07:00
ehci-vt8500.c USB: irq: Remove IRQF_DISABLED 2011-09-18 01:39:36 -07:00
ehci-w90x900.c treewide: Convert uses of struct resource to resource_size(ptr) 2011-06-10 14:55:36 +02:00
ehci-xilinx-of.c treewide: Convert uses of struct resource to resource_size(ptr) 2011-06-10 14:55:36 +02:00
ehci-xls.c usb: Netlogic: Fix HC_LENGTH call in ehci-xls.c 2011-11-18 11:16:36 -08:00
ehci.h drivers: usb: fsl: Workaround for USB erratum-A005275 2015-10-13 03:46:05 +01:00
fhci-dbg.c USB: make hcd.h public (drivers dependency) 2010-05-20 13:21:30 -07:00
fhci-hcd.c USB: irq: Remove IRQF_DISABLED 2011-09-18 01:39:36 -07:00
fhci-hub.c USB: make hcd.h public (drivers dependency) 2010-05-20 13:21:30 -07:00
fhci-mem.c USB: make hcd.h public (drivers dependency) 2010-05-20 13:21:30 -07:00
fhci-q.c USB: make hcd.h public (drivers dependency) 2010-05-20 13:21:30 -07:00
fhci-sched.c QE/FHCI: fixed the CONTROL bug 2011-10-18 13:51:34 -07:00
fhci-tds.c Fix common misspellings 2011-03-31 11:26:23 -03:00
fhci.h Fix common misspellings 2011-03-31 11:26:23 -03:00
fsl-mph-dr-of.c drivers: usb: fsl: Workaround for USB erratum-A005275 2015-10-13 03:46:05 +01:00
hwa-hc.c USB: convert usb_hcd bitfields into atomic flags 2010-08-10 14:35:37 -07:00
imx21-dbg.c treewide: fix a few typos in comments 2011-05-10 10:16:21 +02:00
imx21-hcd.c USB: irq: Remove IRQF_DISABLED 2011-09-18 01:39:36 -07:00
imx21-hcd.h USB: imx21-hcd accept arbitary transfer buffer alignement. 2010-10-22 10:22:03 -07:00
isp116x-hcd.c USB: irq: Remove IRQF_DISABLED 2011-09-18 01:39:36 -07:00
isp116x.h Fix common misspellings 2011-03-31 11:26:23 -03:00
isp1362-hcd.c USB: irq: Remove IRQF_DISABLED 2011-09-18 01:39:36 -07:00
isp1362.h USB: host: Remove dead CONFIG_ARCH_KARO 2010-08-10 14:35:40 -07:00
isp1760-hcd.c USB: add flag for HCDs that can't receive wakeup requests (isp1760-hcd) 2015-05-09 23:16:14 +01:00
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 USB: Fix usb/isp1760 build on sparc 2011-12-21 14:41:04 -08:00
Kconfig usb: gadget: renesas_usbhs: add mod_host support 2011-10-13 20:41:52 +03:00
Makefile Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2011-11-03 13:28:14 -07:00
octeon2-common.c usb: Configure octeon2 glue logic for proper uSOF cycle period. 2011-05-03 10:09:32 -07:00
ohci-at91.c USB: ohci-at91: add a reset function to fix race condition 2012-05-31 00:43:39 +01:00
ohci-ath79.c USB: irq: Remove IRQF_DISABLED 2011-09-18 01:39:36 -07:00
ohci-au1xxx.c Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2011-11-03 13:28:14 -07:00
ohci-cns3xxx.c treewide: Convert uses of struct resource to resource_size(ptr) 2011-06-10 14:55:36 +02:00
ohci-da8xx.c USB: irq: Remove IRQF_DISABLED 2011-09-18 01:39:36 -07:00
ohci-dbg.c llseek: automatically add .llseek fop 2010-10-15 15:53:27 +02:00
ohci-ep93xx.c USB: irq: Remove IRQF_DISABLED 2011-09-18 01:39:36 -07:00
ohci-hcd.c OHCI: final fix for NVIDIA problems (I hope) 2011-11-18 11:18:45 -08:00
ohci-hub.c USB: Fix runtime wakeup on OHCI 2011-10-18 13:42:07 -07:00
ohci-jz4740.c USB: ohci-jz4740: Fix spelling in MODULE_ALIAS 2010-11-11 07:14:07 -08:00
ohci-mem.c
ohci-octeon.c USB: irq: Remove IRQF_DISABLED 2011-09-18 01:39:36 -07:00
ohci-omap.c USB: irq: Remove IRQF_DISABLED 2011-09-18 01:39:36 -07:00
ohci-omap3.c USB: irq: Remove IRQF_DISABLED 2011-09-18 01:39:36 -07:00
ohci-pci.c USB: OHCI: Allow runtime PM without system sleep 2013-10-26 21:06:00 +01:00
ohci-pnx4008.c Merge branch 'gpio' of http://ftp.arm.linux.org.uk/pub/linux/arm/kernel/git-cur/linux-2.6-arm 2011-10-27 08:39:10 +02:00
ohci-pnx8550.c USB: irq: Remove IRQF_DISABLED 2011-09-18 01:39:36 -07:00
ohci-ppc-of.c USB: irq: Remove IRQF_DISABLED 2011-09-18 01:39:36 -07:00
ohci-ppc-soc.c USB: irq: Remove IRQF_DISABLED 2011-09-18 01:39:36 -07:00
ohci-ps3.c USB: irq: Remove IRQF_DISABLED 2011-09-18 01:39:36 -07:00
ohci-pxa27x.c USB: irq: Remove IRQF_DISABLED 2011-09-18 01:39:36 -07:00
ohci-q.c USB: OHCI: don't lose track of EDs when a controller dies 2014-09-13 23:41:38 +01:00
ohci-s3c2410.c USB: irq: Remove IRQF_DISABLED 2011-09-18 01:39:36 -07:00
ohci-sa1111.c USB: irq: Remove IRQF_DISABLED 2011-09-18 01:39:36 -07:00
ohci-sh.c USB: irq: Remove IRQF_DISABLED 2011-09-18 01:39:36 -07:00
ohci-sm501.c USB: irq: Remove IRQF_DISABLED 2011-09-18 01:39:36 -07:00
ohci-spear.c USB: irq: Remove IRQF_DISABLED 2011-09-18 01:39:36 -07:00
ohci-ssb.c USB: irq: Remove IRQF_DISABLED 2011-09-18 01:39:36 -07:00
ohci-tmio.c USB: irq: Remove IRQF_DISABLED 2011-09-18 01:39:36 -07:00
ohci-xls.c usb: OHCI/EHCI support for Netlogic XLS processor. 2011-08-22 15:54:38 -07:00
ohci.h OHCI: final fix for NVIDIA problems (I hope) 2011-11-18 11:18:45 -08:00
oxu210hp-hcd.c treewide: Convert uses of struct resource to resource_size(ptr) 2011-06-10 14:55:36 +02:00
oxu210hp.h
pci-quirks.c OHCI: add a quirk for ULi M5237 blocking on reset 2015-02-20 00:49:35 +00:00
pci-quirks.h usb: host: xhci: fix compilation error for non-PCI based stacks 2012-09-19 15:05:13 +01:00
r8a66597-hcd.c USB: irq: Remove IRQF_DISABLED 2011-09-18 01:39:36 -07:00
r8a66597.h usb: r8a66597-hcd: add function for external controller 2011-07-08 14:57:11 -07:00
sl811_cs.c pcmcia: Convert pcmcia_device_id declarations to const 2011-05-06 07:46:22 +02:00
sl811-hcd.c USB: irq: Remove IRQF_DISABLED 2011-09-18 01:39:36 -07:00
sl811.h
u132-hcd.c usb: u132-hcd: Drop __TIME__ usage 2011-04-13 16:36:06 -07:00
uhci-debug.c USB: UHCI: Add support for big endian descriptors 2011-05-19 16:43:20 -07:00
uhci-grlib.c treewide: Convert uses of struct resource to resource_size(ptr) 2011-06-10 14:55:36 +02:00
uhci-hcd.c USB: UHCI: fix IRQ race during initialization 2013-02-06 04:33:41 +00:00
uhci-hcd.h USB: UHCI: Add support for big endian descriptors 2011-05-19 16:43:20 -07:00
uhci-hub.c USB: UHCI: fix for suspend of virtual HP controller 2013-05-30 14:35:00 +01:00
uhci-pci.c USB: UHCI: report non-PME wakeup signalling for Intel hardware 2017-03-16 02:18:25 +00:00
uhci-q.c usb: fix number of mapped SG DMA entries 2012-01-12 11:29:43 -08:00
xhci-dbg.c Merge 3.0-rc2 into usb-linus as it's needed by some USB patches 2011-06-14 06:51:23 -07:00
xhci-ext-caps.h xHCI: Correct the #define XHCI_LEGACY_DISABLE_SMI 2012-04-22 15:31:10 -07:00
xhci-hub.c usb: xhci: Fix panic if disconnect 2016-11-20 01:01:33 +00:00
xhci-mem.c xhci: free xhci virtual devices with leaf nodes first 2017-03-16 02:18:35 +00:00
xhci-pci.c xhci: add restart quirk for Intel Wildcatpoint PCH 2017-02-23 03:50:54 +00:00
xhci-ring.c xhci: fix deadlock at host remove by running watchdog correctly 2017-03-16 02:18:43 +00:00
xhci.c xhci: fix deadlock at host remove by running watchdog correctly 2017-03-16 02:18:43 +00:00
xhci.h xhci: Add XHCI_INTEL_HOST quirk 2015-12-30 02:25:56 +00:00