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6e0c3339a6
linux/drivers/usb/host
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Alan Stern 6e0c3339a6 USB: EHCI: unlink one async QH at a time 
This patch (as1648) fixes a regression affecting nVidia EHCI
controllers.  Evidently they don't like to have more than one async QH
unlinked at a time.  I can't imagine how they manage to mess it up,
but at least one of them does.

The patch changes the async unlink logic in two ways:

	Each time an IAA cycle is started, only the first QH on the
	async unlink list is handled (rather than all of them).

	Async QHs do not all get unlinked as soon as they have been
	empty for long enough.  Instead, only the last one (i.e., the
	one that has been on the schedule the longest) is unlinked,
	and then only if no other unlinks are in progress at the time.

This means that when multiple QHs are empty, they won't be unlinked as
quickly as before.  That's okay; it won't affect correct operation of
the driver or add an excessive load.  Multiple unlinks tend to be
relatively rare in any case.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Reported-and-tested-by: Piergiorgio Sartor <piergiorgio.sartor@nexgo.de>
Cc: stable <stable@vger.kernel.org> # 3.6
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-01-25 13:58:20 -08:00
..
whci USB: whci-hcd: fix NULL dereference on allocation failure 2012-08-15 15:17:39 -07:00
bcma-hcd.c usb: remove use of __devexit 2012-11-21 13:27:17 -08:00
ehci-atmel.c usb: remove use of __devexit 2012-11-21 13:27:17 -08:00
ehci-dbg.c USB: EHCI: remove unused Link Power Management code 2012-10-31 12:48:07 -07:00
ehci-fsl.c USB: ehci-fsl: fix regression on mpc5121e 2013-01-11 16:01:07 -08:00
ehci-fsl.h powerpc/usb: fix bug of CPU hang when missing USB PHY clock 2012-09-05 16:52:08 -07:00
ehci-grlib.c usb: remove use of __devinit 2012-11-21 13:27:16 -08:00
ehci-hcd.c USB: EHCI: fix build error in ehci-mxc 2013-01-23 11:27:08 -08:00
ehci-hub.c USB: EHCI: prepare to make ehci-hcd a library module 2012-11-01 08:51:12 -07:00
ehci-mem.c USB: EHCI: use hrtimer for (s)iTD deallocation 2012-07-16 16:54:25 -07:00
ehci-msm.c usb: remove use of __devexit 2012-11-21 13:27:17 -08:00
ehci-mv.c usb: host: ehci-mv: fix clk APIs 2012-12-13 11:58:41 +02:00
ehci-mxc.c USB: EHCI: fix build error in ehci-mxc 2013-01-23 11:27:08 -08:00
ehci-octeon.c USB: EHCI: remove ehci_port_power() routine 2012-10-31 12:48:07 -07:00
ehci-omap.c ARM: arm-soc: Header cleanups 2012-12-12 11:45:16 -08:00
ehci-orion.c Drivers: usb: host: ehci-orion.c: remove __devinitdata marking 2013-01-03 15:57:02 -08:00
ehci-pci.c USB: ehci: make debug port in-use detection functional again 2013-01-07 10:34:33 -08:00
ehci-platform.c usb: remove use of __devexit 2012-11-21 13:27:17 -08:00
ehci-pmcmsp.c USB: EHCI: remove ehci_port_power() routine 2012-10-31 12:48:07 -07:00
ehci-ppc-of.c usb: remove use of __devinit 2012-11-21 13:27:16 -08:00
ehci-ps3.c usb: remove use of __devinit 2012-11-21 13:27:16 -08:00
ehci-q.c USB: EHCI: unlink one async QH at a time 2013-01-25 13:58:20 -08:00
ehci-s5p.c usb: remove use of __devexit 2012-11-21 13:27:17 -08:00
ehci-sched.c USB: EHCI: bugfix: urb->hcpriv should not be NULL 2012-11-11 18:10:45 -08:00
ehci-sead3.c Merge v3.6-rc3 into usb-next 2012-08-27 07:15:30 -07:00
ehci-sh.c USB: EHCI: remove ehci_port_power() routine 2012-10-31 12:48:07 -07:00
ehci-spear.c usb: remove use of __devinitdata 2012-11-21 13:27:16 -08:00
ehci-sysfs.c
ehci-tegra.c usb: remove use of __devinitdata 2012-11-21 13:27:16 -08:00
ehci-tilegx.c usb: add host support for the tilegx architecture 2012-07-18 16:40:29 -04:00
ehci-timer.c USB: EHCI: remove ASS/PSS polling timeout 2013-01-25 13:58:20 -08:00
ehci-vt8500.c USB: EHCI: remove unused Link Power Management code 2012-10-31 12:48:07 -07:00
ehci-w90x900.c usb: remove use of __devexit 2012-11-21 13:27:17 -08:00
ehci-xilinx-of.c usb: remove use of __devinit 2012-11-21 13:27:16 -08:00
ehci.h USB: EHCI: add a name for the platform-private field 2013-01-22 09:22:13 -08:00
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: remove use of __devexit 2012-11-21 13:27:17 -08:00
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: use list_move_tail instead of list_del/list_add_tail 2012-09-05 16:55:18 -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 USB: fsl-mph-dr-of: fix regression on mpc5121e 2013-01-11 16:01:06 -08:00
hwa-hc.c
imx21-dbg.c
imx21-hcd.c usb: imx21-hcd: Include missing linux/module.h 2013-01-11 12:01:09 -08:00
imx21-hcd.h ARM: imx: move platform_data definitions 2012-09-14 11:17:21 +02:00
isp116x-hcd.c usb: remove use of __devinit 2012-11-21 13:27:16 -08:00
isp116x.h
isp1362-hcd.c usb: remove use of __devexit 2012-11-21 13:27:17 -08:00
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
isp1760-if.c usb: remove use of __devexit 2012-11-21 13:27:17 -08:00
Kconfig USB: EHCI: fix build error in ehci-mxc 2013-01-23 11:27:08 -08:00
Makefile USB: EHCI: fix build error in ehci-mxc 2013-01-23 11:27:08 -08:00
octeon2-common.c
ohci-at91.c ARM: arm-soc: Header cleanups 2012-12-12 11:45:16 -08:00
ohci-da8xx.c ARM: davinci: move platform_data definitions 2012-09-14 11:16:54 +02:00
ohci-dbg.c USB: ohci-dbg.c: remove dbg() usage 2012-05-01 21:33:37 -07:00
ohci-ep93xx.c usb: remove use of __devinit 2012-11-21 13:27:16 -08:00
ohci-exynos.c usb: remove use of __devexit 2012-11-21 13:27:17 -08:00
ohci-hcd.c USB: OHCI: remove Alchemy OHCI platform driver. 2012-10-22 11:29:12 -07:00
ohci-hub.c USB: ohci: merge ohci_finish_controller_resume with ohci_resume 2012-10-22 11:23:59 -07:00
ohci-jz4740.c usb: remove use of __devexit 2012-11-21 13:27:17 -08:00
ohci-mem.c
ohci-nxp.c usb: remove use of __devinit 2012-11-21 13:27:16 -08:00
ohci-octeon.c usb: remove use of __devinit 2012-11-21 13:27:16 -08:00
ohci-omap3.c ARM: arm-soc: Header cleanups 2012-12-12 11:45:16 -08:00
ohci-omap.c ARM: arm-soc: Header cleanups 2012-12-12 11:45:16 -08:00
ohci-pci.c usb: remove use of __devinit 2012-11-21 13:27:16 -08:00
ohci-platform.c usb: remove use of __devexit 2012-11-21 13:27:17 -08:00
ohci-ppc-of.c usb: remove use of __devinit 2012-11-21 13:27:16 -08:00
ohci-ps3.c usb: remove use of __devinit 2012-11-21 13:27:16 -08:00
ohci-pxa27x.c usb: remove use of __devinit 2012-11-21 13:27:16 -08:00
ohci-q.c USB: OHCI: workaround for hardware bug: retired TDs not added to the Done Queue 2012-11-26 14:57:20 -08:00
ohci-s3c2410.c usb: remove use of __devexit 2012-11-21 13:27:17 -08:00
ohci-sa1111.c usb: remove use of __devinit 2012-11-21 13:27:16 -08:00
ohci-sm501.c USB: OHCI: sm501: fix build failure after ohci_finish_controller_resume removal 2012-10-23 10:18:53 -07:00
ohci-spear.c usb: remove use of __devinitdata 2012-11-21 13:27:16 -08:00
ohci-tilegx.c usb: add host support for the tilegx architecture 2012-07-18 16:40:29 -04:00
ohci-tmio.c usb: host: ohci-tmio: fix compile warning 2013-01-11 16:22:53 -08:00
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 usb: Prevent dead ports when xhci is not enabled 2013-01-24 09:56:19 -08:00
pci-quirks.h usb: host: xhci: fix compilation error for non-PCI based stacks 2012-09-05 12:26:11 -07:00
r8a66597-hcd.c usb: remove use of __devexit 2012-11-21 13:27:17 -08:00
r8a66597.h usb/host/r8a66597: remove conditional compilation of clk code 2012-07-30 17:25:12 -07:00
sl811_cs.c
sl811-hcd.c usb: remove use of __devexit 2012-11-21 13:27:17 -08:00
sl811.h
ssb-hcd.c usb: remove use of __devexit 2012-11-21 13:27:17 -08:00
u132-hcd.c usb: remove use of __devexit 2012-11-21 13:27:17 -08:00
uhci-debug.c
uhci-grlib.c usb: remove use of __devinit 2012-11-21 13:27:16 -08:00
uhci-hcd.c USB: UHCI: fix IRQ race during initialization 2013-01-22 08:55:13 -08:00
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-platform.c usb: remove use of __devinit 2012-11-21 13:27:16 -08:00
uhci-q.c UHCI: implement new semantics for URB_ISO_ASAP 2012-10-22 11:10:24 -07:00
xhci-dbg.c xhci: trivial: Remove assigned but unused slot_ctx. 2012-10-25 13:13:48 -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 xhci: Avoid "dead ports", add roothub port polling. 2013-01-03 14:10:29 -08:00
xhci-mem.c xhci: Handle HS bulk/ctrl endpoints that don't NAK. 2013-01-03 14:09:55 -08:00
xhci-pci.c usb: host: xhci: move HC_STATE_SUSPENDED check to xhci_suspend() 2012-11-12 11:45:34 -08:00
xhci-plat.c usb: host: xhci-plat: use ioremap_nocache 2012-09-05 12:07:19 -07:00
xhci-ring.c USB: XHCI: fix memory leak of URB-private data 2013-01-24 09:53:38 -08:00
xhci.c xhci: Avoid "dead ports", add roothub port polling. 2013-01-03 14:10:29 -08:00
xhci.h xhci: Avoid global symbol pollution with handshake. 2012-11-12 11:44:25 -08:00