]> git.baikalelectronics.ru Git - kernel.git/commit
xhci: Fix USB 3.1 capability detection on early xHCI 1.1 spec based hosts
authorMathias Nyman <mathias.nyman@linux.intel.com>
Fri, 4 Oct 2019 11:59:29 +0000 (14:59 +0300)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Fri, 4 Oct 2019 12:32:11 +0000 (14:32 +0200)
commit96e42b19884a0f661e7503705880e166d1324ef3
treef4ddb80294329c6446d9c49776cc9975759891f4
parent41694f4a70333f6067118334afc69eb2409d180a
xhci: Fix USB 3.1 capability detection on early xHCI 1.1 spec based hosts

Early xHCI 1.1 spec did not mention USB 3.1 capable hosts should set
sbrn to 0x31, or that the minor revision is a two digit BCD
containing minor and sub-minor numbers.
This was later clarified in xHCI 1.2.

Some USB 3.1 capable hosts therefore have sbrn set to 0x30, or minor
revision set to 0x1 instead of 0x10.

Detect the USB 3.1 capability correctly for these hosts as well

Fixes: 1d34a74bdd0f ("xhci: detect USB 3.2 capable host controllers correctly")
Cc: <stable@vger.kernel.org> # v4.18+
Cc: Loïc Yhuel <loic.yhuel@gmail.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Link: https://lore.kernel.org/r/1570190373-30684-5-git-send-email-mathias.nyman@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/usb/host/xhci.c