AuxXxilium/linux_dsm_epyc7002
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6cc30d85a5
linux_dsm_epyc7002/drivers/usb/host
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Sarah Sharp 6cc30d85a5 USB: xHCI: Fix bug in link TRB activation change. 
Commit 6c12db90f1 introduced a bug for
control transfers.  The patch was supposed to change when the link TRBs at
the end of each ring segment were given to the hardware.  If a transfer
descriptor (TD) ended just before the link TRB, the code wouldn't give
back the link TRB to the hardware; instead it would be given back in
prepare_ring() just before the next TD was enqueued at the top of the
ring.

Unfortunately, the code relied on checking the chain bit of the TRB to
determine whether the TD ended just before the link TRB.  It assumed that
the ring enqueuing code would call prepare_ring() before enqueuing the
next TD.  However, control transfers are made of multiple TDs, and
prepare_ring() is only called once before enqueuing two or three TDs.

If the first or second TD of the control transfer ended just before the
link TRB, then the code in inc_enq() would not move the enqueue pointer
past the link TRB, and the link TRB would get overwritten.  This would
cause the xHCI driver to start writing to memory past the ring segment,
and eventually the system would crash or hang.

The fix is to add a flag to inc_enq() that says whether the caller will
enqueue more TDs before calling prepare_ring().  If the chain bit is
cleared (meaning this is the last TRB in a TD), and the caller will not
enqueue more TDs, then we defer giving back the link TRB.

Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-06-30 08:16:05 -07:00
..
whci USB: Change the scatterlist type in struct urb 2010-05-20 13:21:41 -07:00
ehci-atmel.c USB: ehci-atmel.c: use resource_size() 2010-03-02 14:53:18 -08:00
ehci-au1xxx.c USB: EHCI: fix controller wakeup flag settings during suspend 2010-05-20 13:21:45 -07:00
ehci-dbg.c USB: EHCI: split ehci_qh into hw and sw parts 2009-09-23 06:46:29 -07:00
ehci-fsl.c USB: EHCI: fix controller wakeup flag settings during suspend 2010-05-20 13:21:45 -07:00
ehci-fsl.h ehci-fsl: fix cache coherency problem on system with large memory 2007-05-23 20:14:15 -07:00
ehci-hcd.c usb: fix ehci_hcd build failure when both generic-OF and xilinx is selected 2010-06-04 13:16:19 -07:00
ehci-hub.c USB: EHCI: fix controller wakeup flag settings during suspend 2010-05-20 13:21:45 -07:00
ehci-ixp4xx.c USB: EHCI: use the new clear_tt_buffer interface 2009-07-12 15:16:39 -07:00
ehci-mem.c USB: EHCI: defer reclamation of siTDs 2010-04-22 15:18:28 -07:00
ehci-mxc.c mxc: Add generic USB HW initialization for MX51 2010-05-03 15:18:13 +02:00
ehci-omap.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6 2010-05-20 21:26:12 -07:00
ehci-orion.c USB: ehci-orion.c: use resource_size() 2010-03-02 14:53:17 -08:00
ehci-pci.c USB: EHCI: fix controller wakeup flag settings during suspend 2010-05-20 13:21:45 -07:00
ehci-ppc-of.c of: Remove duplicate fields from of_platform_driver 2010-05-22 00:10:40 -06:00
ehci-ps3.c USB: EHCI: use the new clear_tt_buffer interface 2009-07-12 15:16:39 -07:00
ehci-q.c USB: Change the scatterlist type in struct urb 2010-05-20 13:21:41 -07:00
ehci-sched.c USB: EHCI: defer reclamation of siTDs 2010-04-22 15:18:28 -07:00
ehci-w90x900.c USB: Add nuvoton Ehci driver for w90p910 platform 2009-09-23 06:46:20 -07:00
ehci-xilinx-of.c of/usb: fix build error due to of_node pointer move 2010-06-02 13:35:02 -06:00
ehci.h USB: EHCI: fix controller wakeup flag settings during suspend 2010-05-20 13:21:45 -07:00
fhci-dbg.c USB: make hcd.h public (drivers dependency) 2010-05-20 13:21:30 -07:00
fhci-hcd.c Merge remote branch 'origin' into secretlab/next-devicetree 2010-05-22 00:36:56 -06:00
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 USB: make hcd.h public (drivers dependency) 2010-05-20 13:21:30 -07:00
fhci-tds.c USB: make hcd.h public (drivers dependency) 2010-05-20 13:21:30 -07:00
fhci.h USB: FHCI: cq_get() should check kfifo_out()'s return value 2010-05-20 13:21:46 -07:00
hwa-hc.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
imx21-dbg.c USB: MXC: Add i.MX21 specific USB host controller driver. 2010-03-02 14:52:55 -08:00
imx21-hcd.c USB: make hcd.h public (drivers dependency) 2010-05-20 13:21:30 -07:00
imx21-hcd.h USB: MXC: Add i.MX21 specific USB host controller driver. 2010-03-02 14:52:55 -08:00
isp116x-hcd.c USB: make hcd.h public (drivers dependency) 2010-05-20 13:21:30 -07:00
isp116x.h USB: add missing KERN_* constants to printks 2009-03-24 16:20:30 -07:00
isp1362-hcd.c USB: clean up some host controller sparse warnings 2010-05-20 13:21:39 -07:00
isp1362.h USB: isp1362: fix inw warning on Blackfin systems 2010-06-04 13:16:18 -07:00
isp1760-hcd.c USB: isp1760: Soften DW3 X/transaction error bit handling 2010-05-20 13:21:44 -07:00
isp1760-hcd.h USB: isp1760: allow platform devices to customize devflags 2009-09-23 06:46:29 -07:00
isp1760-if.c Merge remote branch 'origin' into secretlab/next-devicetree 2010-05-22 00:36:56 -06:00
Kconfig USB: ohci: Add Kconfig entries for ohci-omap3 2010-05-20 13:21:44 -07:00
Makefile USB: xhci: rename driver to xhci_hcd 2010-03-19 07:24:08 -07:00
ohci-at91.c USB: ohci-at91: fix power management hanging 2010-04-30 09:25:12 -07:00
ohci-au1xxx.c const: constify remaining dev_pm_ops 2009-12-15 08:53:25 -08:00
ohci-da8xx.c USB: OHCI: DA8xx/OMAP-L1x: fix up macro rename 2010-04-22 15:18:24 -07:00
ohci-dbg.c USB: Convert concatenated __FILE__ to %s, __FILE__ 2010-03-02 14:54:59 -08:00
ohci-ep93xx.c USB: ohci-ep93xx.c: remove unused variable 2009-09-23 06:46:34 -07:00
ohci-hcd.c USB: ohci: Add Kconfig entries for ohci-omap3 2010-05-20 13:21:44 -07:00
ohci-hub.c USB: OHCI: don't look at the root hub to get the number of ports 2010-04-30 09:25:10 -07:00
ohci-lh7a404.c USB: Convert concatenated __FILE__ to %s, __FILE__ 2010-03-02 14:54:59 -08:00
ohci-mem.c USB: OHCI handles more ZFMicro quirks 2007-10-12 14:54:59 -07:00
ohci-omap3.c USB: ohci: introduce omap3 ohci-hcd driver 2010-05-20 13:21:44 -07:00
ohci-omap.c omap: headers: Move remaining headers from include/mach to include/plat 2009-10-20 09:40:47 -07:00
ohci-pci.c USB: ohci: quirk AMD prefetch for USB 1.1 ISO transfer 2009-11-17 16:46:33 -08:00
ohci-pnx4008.c USB: fix I2C API usage in ohci-pnx4008. 2010-03-02 14:55:15 -08:00
ohci-pnx8550.c USB: automatically enable RHSC interrupts 2008-08-21 10:26:38 -07:00
ohci-ppc-of.c of: Remove duplicate fields from of_platform_driver 2010-05-22 00:10:40 -06:00
ohci-ppc-soc.c USB: Convert concatenated __FILE__ to %s, __FILE__ 2010-03-02 14:54:59 -08:00
ohci-ps3.c usb/ps3: Add missing annotations 2009-06-16 14:17:32 +10:00
ohci-pxa27x.c const: constify remaining dev_pm_ops 2009-12-15 08:53:25 -08:00
ohci-q.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
ohci-s3c2410.c USB: S3C: Move usb-control.h to platform include 2009-03-24 16:20:45 -07:00
ohci-sa1111.c USB: Convert concatenated __FILE__ to %s, __FILE__ 2010-03-02 14:54:59 -08:00
ohci-sh.c USB: automatically enable RHSC interrupts 2008-08-21 10:26:38 -07:00
ohci-sm501.c USB: automatically enable RHSC interrupts 2008-08-21 10:26:38 -07:00
ohci-ssb.c USB: automatically enable RHSC interrupts 2008-08-21 10:26:38 -07:00
ohci-tmio.c usb: struct device - replace bus_id with dev_name(), dev_set_name() 2009-01-07 09:59:52 -08:00
ohci.h USB: ohci: quirk AMD prefetch for USB 1.1 ISO transfer 2009-11-17 16:46:33 -08:00
oxu210hp-hcd.c USB: straighten out port feature vs. port status usage 2010-05-20 13:21:31 -07:00
oxu210hp.h USB: replace uses of __constant_{endian} 2009-03-24 16:20:33 -07:00
pci-quirks.c Revert "USB: Work around BIOS bugs by quiescing USB controllers earlier" 2009-10-11 15:57:57 -07:00
pci-quirks.h
r8a66597-hcd.c usb: r8a66597-hcd pio to mmio accessor conversion. 2010-06-02 16:31:15 +09:00
r8a66597.h usb: r8a66597-hcd pio to mmio accessor conversion. 2010-06-02 16:31:15 +09:00
sl811_cs.c pcmcia: dev_node removal (drivers with updated printk call) 2010-05-10 10:23:15 +02:00
sl811-hcd.c USB: straighten out port feature vs. port status usage 2010-05-20 13:21:31 -07:00
sl811.h Rename WARN() to WARNING() to clear the namespace 2008-07-25 10:53:29 -07:00
u132-hcd.c USB: fix u132-hcd code/data warning 2010-05-20 13:21:43 -07:00
uhci-debug.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
uhci-hcd.c USB: make hcd.h public (drivers dependency) 2010-05-20 13:21:30 -07:00
uhci-hcd.h USB: replace uses of __constant_{endian} 2009-03-24 16:20:33 -07:00
uhci-hub.c USB: add missing delay during remote wakeup 2010-01-20 15:24:34 -08:00
uhci-q.c USB: uhci: rm repeatedly evaluation for urbp->qh 2009-09-23 06:46:30 -07:00
xhci-dbg.c USB: xhci: Correct assumptions about number of rings per endpoint. 2010-05-20 13:21:38 -07:00
xhci-ext-caps.h USB: xhci: Fix finding extended capabilities registers 2010-03-02 14:55:02 -08:00
xhci-hub.c USB: xhci: Remove the arbitrary limit of 15 xHCI ports 2010-05-20 13:21:45 -07:00
xhci-mem.c USB: remove the usb_host_ss_ep_comp structure 2010-05-20 13:21:40 -07:00
xhci-pci.c USB: xhci: Print NEC firmware version. 2010-06-04 13:16:19 -07:00
xhci-ring.c USB: xHCI: Fix bug in link TRB activation change. 2010-06-30 08:16:05 -07:00
xhci.c USB: xhci: Print NEC firmware version. 2010-06-04 13:16:19 -07:00
xhci.h USB: xhci: Print NEC firmware version. 2010-06-04 13:16:19 -07:00