[v1,0/1] usb: gadget: dummy_hcd: Fix regression due to hrtimer migration

Message

Marcello Sylvester Bauer June 26, 2024, 1:47 p.m. UTC

The kernel CI bots such as syzbot and intel kernel bot reported a
regression due to the migration of the transfare scheduler from timer
list to hrtimer. The current assumption is that this is because timer
list uses soft interrupt context. I have not been able to reproduce the
regression consistently. So I'm submitting this patch in the hope that
it solves the issue.

Do not apply the patch if any bot still reports the problem.

Marcello Sylvester Bauer (1):
  usb: gadget: dummy_hcd: make hrtimer expire in soft irq context

 drivers/usb/gadget/udc/dummy_hcd.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

Comments

Alan Stern June 26, 2024, 2 p.m. UTC | #1

On Wed, Jun 26, 2024 at 03:47:19PM +0200, Marcello Sylvester Bauer wrote:
> The kernel CI bots such as syzbot and intel kernel bot reported a
> regression due to the migration of the transfare scheduler from timer
> list to hrtimer. The current assumption is that this is because timer
> list uses soft interrupt context. I have not been able to reproduce the
> regression consistently. So I'm submitting this patch in the hope that
> it solves the issue.
> 
> Do not apply the patch if any bot still reports the problem.

You should send the patch to syzbot and have it run its test.  Then 
you'll know whether the patch works.

Alan Stern

> Marcello Sylvester Bauer (1):
>   usb: gadget: dummy_hcd: make hrtimer expire in soft irq context
> 
>  drivers/usb/gadget/udc/dummy_hcd.c | 12 ++++++------
>  1 file changed, 6 insertions(+), 6 deletions(-)
> 
> -- 
> 2.45.2
> 
>