]> git.proxmox.com Git - mirror_ubuntu-eoan-kernel.git/commit
xhci: fix null pointer dereference on ring_doorbell_for_active_rings
authorOleksij Rempel <linux@rempel-privat.de>
Sun, 21 Jul 2013 13:36:19 +0000 (15:36 +0200)
committerSarah Sharp <sarah.a.sharp@linux.intel.com>
Thu, 25 Jul 2013 15:10:09 +0000 (08:10 -0700)
commitd66eaf9f89502971fddcb0de550b01fa6f409d83
treef8f938260a47de6d06ccb6858618708c3c312aed
parent07f3cb7c28bf3f4dd80bfb136cf45810c46ac474
xhci: fix null pointer dereference on ring_doorbell_for_active_rings

in some cases where device is attched to xhci port and do not responding,
for example ath9k_htc with stalled firmware, kernel will
crash on ring_doorbell_for_active_rings.
This patch check if pointer exist before it is used.

This patch should be backported to kernels as old as 2.6.35, that
contain the commit e9df17eb1408cfafa3d1844bfc7f22c7237b31b8 "USB: xhci:
Correct assumptions about number of rings per endpoint"

Signed-off-by: Oleksij Rempel <linux@rempel-privat.de>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Cc: stable@vger.kernel.org
drivers/usb/host/xhci-ring.c