lkml.org 
[lkml]   [2022]   [Jun]   [16]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH v4 -next] usb: xhci: disable irq during initialization
On Thu, Jun 16, 2022 at 04:09:33PM +0800, Hongyu Xie wrote:
> irq is disabled in xhci_quiesce(called by xhci_halt, with bit:2 cleared
> in USBCMD register), but xhci_run(called by usb_add_hcd) re-enable it.
> It's possible that you will receive thousands of interrupt requests
> after initialization for 2.0 roothub. And you will get a lot of
> warning like, "xHCI dying, ignoring interrupt. Shouldn't IRQs be
> disabled?". This amount of interrupt requests will cause the entire
> system to freeze.
> This problem was first found on a device with ASM2142 host controller
> on it.
>
> Signed-off-by: Hongyu Xie <xiehongyu1@kylinos.cn>
> Reported-by: kernel test robot <lkp@intel.com>

the test robot did not find this original problem, it only found
problems with your original submission, which is different.

\
 
 \ /
  Last update: 2022-06-16 10:14    [W:0.037 / U:0.340 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site