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46c73d1d3e
linux/drivers/usb/host
History
Alan Stern 46c73d1d3e USB: EHCI: handle isochronous underruns with tasklets 
This patch updates the iso_stream_schedule() routine in ehci-sched.c
to handle cases where an underrun causes an isochronous endpoint's
queue to empty out, but the client driver wants to maintain
synchronization with the device (i.e., the URB_ISO_ASAP flag is not
set).  This could not happen until recently, when ehci-hcd switched
over to completing URBs in a tasklet.

(This may seem like an unlikely case to worry about, but underruns are
all too common with the snd-usb-audio driver, which doesn't use
URB_ISO_ASAP.)

As part of the fix, some URBs may need to be given back when they are
submitted.  This is necessary when the URB's scheduled slots all fall
before the current value of ehci->last_iso_frame, and as an
optimization we do it also when the slots all fall before the current
frame number.

As a second part of the fix, we may need to skip some but not all of
an URB's packets.  This is necessary when some of the URB's scheduled
slots fall before the current value of ehci->last_iso_frame and some
of them fall after the current frame number.  A new field
(first_packet) is added to struct ehci_iso_sched, to indicate how many
packets should be skipped.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
CC: Ming Lei <tom.leiming@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-09-17 09:49:24 -07:00
..
whci wusbhc: disable suspend and resume on the root hub. 2013-06-06 12:14:38 -07:00
bcma-hcd.c usb: remove use of __devexit 2012-11-21 13:27:17 -08:00
ehci-atmel.c ehci-atmel.c: prepare clk before calling enable 2013-06-24 16:21:52 -07:00
ehci-dbg.c ehci: remove duplicate debug_async_open() prototype in ehci-dbg.c 2013-08-30 12:02:08 -07:00
ehci-fsl.c ehci: enable debugging code when CONFIG_DYNAMIC_DEBUG is set 2013-08-30 12:02:07 -07:00
ehci-fsl.h
ehci-grlib.c USB: EHCI: support running URB giveback in tasklet context 2013-08-12 11:43:49 -07:00
ehci-hcd.c ehci: remove debugging statement with ehci statistics in ehci_stop() 2013-08-30 12:02:08 -07:00
ehci-hub.c ehci: remove ehci_vdbg() verbose debugging statements 2013-08-30 12:02:07 -07:00
ehci-mem.c USB: EHCI: improve interrupt qh unlink 2013-08-12 11:43:48 -07:00
ehci-msm.c USB: EHCI: make ehci-msm a separate driver 2013-04-08 09:40:20 -07:00
ehci-mv.c USB: EHCI: support running URB giveback in tasklet context 2013-08-12 11:43:49 -07:00
ehci-mxc.c usb: ehci-mxc: check for pdata before dereferencing 2013-08-23 10:46:03 -07:00
ehci-octeon.c USB: EHCI: support running URB giveback in tasklet context 2013-08-12 11:43:49 -07:00
ehci-omap.c USB: host: use dev_get_platdata() 2013-07-31 17:53:50 -07:00
ehci-orion.c USB: host: use dev_get_platdata() 2013-07-31 17:53:50 -07:00
ehci-pci.c Intel xhci: refactor EHCI/xHCI port switching 2013-07-23 14:50:29 -07:00
ehci-platform.c USB: host: use dev_get_platdata() 2013-07-31 17:53:50 -07:00
ehci-pmcmsp.c USB: EHCI: support running URB giveback in tasklet context 2013-08-12 11:43:49 -07:00
ehci-ppc-of.c USB: EHCI: support running URB giveback in tasklet context 2013-08-12 11:43:49 -07:00
ehci-ps3.c USB: EHCI: support running URB giveback in tasklet context 2013-08-12 11:43:49 -07:00
ehci-q.c ehci: enable debugging code when CONFIG_DYNAMIC_DEBUG is set 2013-08-30 12:02:07 -07:00
ehci-s5p.c USB: host: use dev_get_platdata() 2013-07-31 17:53:50 -07:00
ehci-sched.c USB: EHCI: handle isochronous underruns with tasklets 2013-09-17 09:49:24 -07:00
ehci-sead3.c USB: EHCI: support running URB giveback in tasklet context 2013-08-12 11:43:49 -07:00
ehci-sh.c USB: EHCI: support running URB giveback in tasklet context 2013-08-12 11:43:49 -07:00
ehci-spear.c usb: host: ehci-spear: Remove redundant checks 2013-05-30 21:32:53 +09:00
ehci-sysfs.c
ehci-tegra.c usb: host: tegra: Tegra30 support 2013-08-12 13:29:54 -05:00
ehci-tilegx.c USB: EHCI: support running URB giveback in tasklet context 2013-08-12 11:43:49 -07:00
ehci-timer.c USB: EHCI: improve interrupt qh unlink 2013-08-12 11:43:48 -07:00
ehci-w90x900.c USB: EHCI: support running URB giveback in tasklet context 2013-08-12 11:43:49 -07:00
ehci-xilinx-of.c USB: EHCI: support running URB giveback in tasklet context 2013-08-12 11:43:49 -07:00
ehci.h USB: EHCI: handle isochronous underruns with tasklets 2013-09-17 09:49:24 -07:00
fhci-dbg.c
fhci-hcd.c usb: remove use of __devexit 2012-11-21 13:27:17 -08:00
fhci-hub.c
fhci-mem.c
fhci-q.c
fhci-sched.c USB: FHCI: upgrade the isochronous API 2013-05-30 21:34:31 +09:00
fhci-tds.c
fhci.h USB: FHCI: upgrade the isochronous API 2013-05-30 21:34:31 +09:00
fotg210-hcd.c usb: host: Faraday fotg210-hcd driver 2013-07-29 11:15:39 -07:00
fotg210.h usb: host: Faraday fotg210-hcd driver 2013-07-29 11:15:39 -07:00
fsl-mph-dr-of.c Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc 2013-09-06 10:49:42 -07:00
fusbh200-hcd.c usb: host: fusbh200-hcd: rename two functions 2013-06-03 10:52:40 -07:00
fusbh200.h usb host: Faraday USB2.0 FUSBH200-HCD driver 2013-05-17 10:12:52 -07:00
hwa-hc.c HWA: avoid constant suspend and resume on the root hub 2013-08-12 15:41:09 -07:00
imx21-dbg.c
imx21-hcd.c USB: host: use dev_get_platdata() 2013-07-31 17:53:50 -07:00
imx21-hcd.h
isp116x-hcd.c USB: host: use dev_get_platdata() 2013-07-31 17:53:50 -07:00
isp116x.h USB: isp116x: remove dependency on CONFIG_USB_DEBUG 2013-07-23 16:35:17 -07:00
isp1362-hcd.c USB: host: use dev_get_platdata() 2013-07-31 17:53:50 -07:00
isp1362.h USB: isp1362: move debug files from proc to debugfs 2013-07-24 14:43:05 -07:00
isp1760-hcd.c USB: remove remaining instances of USB_SUSPEND 2013-05-15 13:44:44 -04:00
isp1760-hcd.h
isp1760-if.c USB: host: use dev_get_platdata() 2013-07-31 17:53:50 -07:00
Kconfig Remove GENERIC_HARDIRQ config option 2013-09-13 15:09:52 +02:00
Makefile xhci: add traces for debug messages in xhci_address_device() 2013-08-13 16:05:38 -07:00
octeon2-common.c
ohci-at91.c usb: ohci-at91: remove unnecessary dev_set_drvdata() 2013-08-27 21:36:46 -07:00
ohci-da8xx.c USB: host: use dev_get_platdata() 2013-07-31 17:53:50 -07:00
ohci-dbg.c
ohci-ep93xx.c usb: ohci-ep93xx: tidy up driver (*probe) and (*remove) 2013-07-26 13:54:29 -07:00
ohci-exynos.c USB: host: use dev_get_platdata() 2013-07-31 17:53:50 -07:00
ohci-hcd.c USB: ohci_usb warn "irq nobody cared" on shutdown 2013-07-26 13:55:21 -07:00
ohci-hub.c USB: OHCI: prepare to make ohci-hcd a library module 2013-05-30 21:36:03 +09:00
ohci-jz4740.c USB: ohci-jz4740: remove unnecessary platform_set_drvdata() 2013-05-16 17:47:17 -07:00
ohci-mem.c
ohci-nxp.c drivers/usb/host: remove leftover release_mem_region 2013-05-30 21:32:52 +09:00
ohci-octeon.c usb: host: ohci-octeon: Remove redundant platform_set_drvdata() 2013-05-17 10:14:52 -07:00
ohci-omap3.c USB: host: Use usb_hcd_platform_shutdown() wherever possible 2013-07-25 12:01:12 -07:00
ohci-omap.c USB: host: use dev_get_platdata() 2013-07-31 17:53:50 -07:00
ohci-pci.c USB patches for 3.12-rc1 2013-09-03 11:35:32 -07:00
ohci-platform.c USB: host: use dev_get_platdata() 2013-07-31 17:53:50 -07:00
ohci-ppc-of.c USB: host: Use usb_hcd_platform_shutdown() wherever possible 2013-07-25 12:01:12 -07:00
ohci-ps3.c usb: remove use of __devinit 2012-11-21 13:27:16 -08:00
ohci-pxa27x.c USB: host: use dev_get_platdata() 2013-07-31 17:53:50 -07:00
ohci-q.c USB: OHCI: Generic changes to make ohci-pci a separate driver 2013-05-30 21:36:03 +09:00
ohci-s3c2410.c USB: host: use dev_get_platdata() 2013-07-31 17:53:50 -07:00
ohci-sa1111.c usb: remove use of __devinit 2012-11-21 13:27:16 -08:00
ohci-sm501.c USB: ohci-sm501: remove unnecessary platform_set_drvdata() 2013-05-16 17:47:18 -07:00
ohci-spear.c Merge 3.10-rc3 into usb-next 2013-05-27 11:00:52 +09:00
ohci-tilegx.c USB: host: use dev_get_platdata() 2013-07-31 17:53:50 -07:00
ohci-tmio.c usb: host: ohci-tmio: Remove redundant platform_set_drvdata() 2013-05-17 10:14:53 -07:00
ohci.h USB: OHCI: add a name for the platform-private field 2013-06-03 11:03:18 -07:00
oxu210hp-hcd.c Merge 3.10-rc3 into usb-next 2013-05-27 11:00:52 +09:00
oxu210hp.h
pci-quirks.c Intel xhci: refactor EHCI/xHCI port switching 2013-07-23 14:50:29 -07:00
pci-quirks.h Merge 3.11-rc3 into usb-next 2013-07-29 07:43:16 -07:00
r8a66597-hcd.c usb: r8a66597-hcd: use platform_{get,set}_drvdata() 2013-08-30 11:11:35 -07:00
r8a66597.h
sl811_cs.c drivers/usb: use module_pcmcia_driver() in pcmcia drivers 2013-03-15 12:26:38 -07:00
sl811-hcd.c USB: host: use dev_get_platdata() 2013-07-31 17:53:50 -07:00
sl811.h USB: sl811: move debug files from proc to debugfs 2013-07-24 14:43:05 -07:00
ssb-hcd.c usb: remove use of __devexit 2012-11-21 13:27:17 -08:00
u132-hcd.c USB: host: use dev_get_platdata() 2013-07-31 17:53:50 -07:00
uhci-debug.c USB: uhci: beautify source code 2013-01-24 13:59:26 -08:00
uhci-grlib.c USB: host: use platform_{get,set}_drvdata() 2013-05-30 21:32:54 +09:00
uhci-hcd.c Merge 3.8-rc5 into usb-next 2013-01-25 12:41:02 -08:00
uhci-hcd.h USB: UHCI: remove unused definition 2013-01-24 13:42:09 -08:00
uhci-hub.c USB: UHCI: fix for suspend of virtual HP controller 2013-05-15 13:41:40 -04:00
uhci-pci.c
uhci-platform.c USB: host: use platform_{get,set}_drvdata() 2013-05-30 21:32:54 +09:00
uhci-q.c USB: fix latency in uhci-hcd and ohci-hcd 2013-05-15 13:42:45 -04:00
xhci-dbg.c xhci: add traces for debug messages in xhci_address_device() 2013-08-13 16:05:38 -07:00
xhci-ext-caps.h xhci: fix port BESL LPM capability checking 2013-08-27 08:54:42 -07:00
xhci-hub.c xhci: add trace for debug messages related to quirks 2013-08-13 16:05:41 -07:00
xhci-mem.c xhci: Step 1 to fix usb-linus and usb-next. 2013-08-15 18:00:46 -07:00
xhci-pci.c xhci: add trace for debug messages related to quirks 2013-08-13 16:05:41 -07:00
xhci-plat.c xhci: Step 1 to fix usb-linus and usb-next. 2013-08-15 18:00:46 -07:00
xhci-ring.c xhci:prevent "callbacks suppressed" when debug is not enabled 2013-08-27 08:56:31 -07:00
xhci-trace.c xhci: add traces for debug messages in xhci_address_device() 2013-08-13 16:05:38 -07:00
xhci-trace.h xhci: trace debug statements related to ring expansion 2013-08-13 21:14:44 -07:00
xhci.c xhci: Fix warning introduced by disabling runtime PM. 2013-08-28 10:55:47 -07:00
xhci.h xhci: Step 1 to fix usb-linus and usb-next. 2013-08-15 18:00:46 -07:00