lkml.org 
[lkml]   [2019]   [Jul]   [5]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Date
SubjectRe: [PATCH 1/2] usb: pci-quirks: Correct AMD PLL quirk detection
On Fri, Jul 5, 2019 at 1:22 AM Greg KH <gregkh@linuxfoundation.org> wrote:
>
> On Thu, Jul 04, 2019 at 11:35:28AM -0400, Ryan Kennedy wrote:
> > The AMD PLL USB quirk is incorrectly enabled on newer Ryzen
> > chipsets. The logic in usb_amd_find_chipset_info currently checks
> > for unaffected chipsets rather than affected ones. This broke
> > once a new chipset was added in e788787ef. It makes more sense
> > to reverse the logic so it won't need to be updated as new
> > chipsets are added. Note that the core of the workaround in
> > usb_amd_quirk_pll does correctly check the chipset.
> >
> > Signed-off-by: Ryan Kennedy <ryan5544@gmail.com>
> > ---
> > drivers/usb/host/pci-quirks.c | 31 +++++++++++++++++++------------
> > 1 file changed, 19 insertions(+), 12 deletions(-)
>
> Should this be backported to stable kernels?

The bug is fairly harmless, so I wouldn't say it's a must-have. I only
noticed this because I saw the log message and was curious what the
quirk was for. The fix saves us calling usb_amd_quirk_pll() and taking
the lock in there. Others here should know better than I what's stable
worthy.

Ryan

>
> thanks,
>
> greg k-h

\
 
 \ /
  Last update: 2019-07-05 16:49    [W:0.046 / U:0.532 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site