Re: [PATCH v2 1/2] virtio_console: free unused buffers with port delete

Pankaj Gupta
2019-08-08T12:19:27Z

>
> On Thu, Aug 08, 2019 at 05:06:05PM +0530, Pankaj Gupta wrote:
> > The commit a7a69ec0d8e4 ("virtio_console: free buffers after reset")
> > deferred detaching of unused buffer to virtio device unplug time.
> >
> > This causes unplug/replug of single port in virtio device with an
> > error "Error allocating inbufs\n". As we don't free the unused buffers
> > attached with the port. Re-plug the same port tries to allocate new
> > buffers in virtqueue and results in this error if queue is full.
> >
> > This patch removes the unused buffers in vq's when we unplug the port.
> > This is the best we can do as we cannot call device_reset because virtio
> > device is still active.
>
> Why is this indented?

o.k. will remove the empty lines.

>
> >
> > Reported-by: Xiaohui Li <xiaohli@redhat.com>
> > Fixes: b3258ff1d6 ("virtio_console: free buffers after reset")
>
> Fixes: b3258ff1d608 ("virtio: Decrement avail idx on buffer detach")
>
> is the correct format to use.

Sorry! for this. Commit it fixes is:
a7a69ec0d8e4 ("virtio_console: free buffers after reset")

>
> And given that this is from 2.6.39 (and 2.6.38.5), shouldn't it also be
> backported for the stable kernels?

Yes.

Thanks,
Pankaj

>
> thanks,
>
> greg k-h
>