Re: [PATCH] xhci: Keep interrupt disabled in initialization until host is running.

[Prashanth K]

On 22-09-23 04:00 pm, Greg Kroah-Hartman wrote:
> On Fri, Sep 22, 2023 at 02:51:41PM +0530, Prashanth K wrote:
> > From: Hongyu Xie <xy521521@xxxxxxxxx>
> >
> > [ Upstream commit 808925075fb750804a60ff0710614466c396db4 ]
> >
> > 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.
> >
> > [tidy up old code while moving it, reword header -Mathias]
> >
> > Cc: stable@xxxxxxxxxx
> > Signed-off-by: Hongyu Xie <xiehongyu1@xxxxxxxxxx>
> > Signed-off-by: Mathias Nyman <mathias.nyman@xxxxxxxxxxxxxxx>
> > Link: https://lore.kernel.org/r/20220623111945.1557702-2-mathias.nyman@xxxxxxxxxxxxxxx
> > Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
> > ---
> >   drivers/usb/host/xhci.c | 34 +++++++++++++++++++++-------------
> >   1 file changed, 21 insertions(+), 13 deletions(-)
>
> What stable kernel(s) are you asking this to be applied to?
>
> greg k-h
Need this patch on v5.15, I had cc'ed "stable@xxxxxxxxxx # 5.15", but 
looks like it didn't work. Should I resend this with SOB and CC tags?

Thanks,
Prashanth K