Re: [PATCH 1/1] usb: cdc-acm: handle unlinked urb in acm read callback

[Oliver Neukum]

On Tue, 2015-12-29 at 13:46 +0800, Lu Baolu wrote:
> In current acm driver, the bulk-in callback function ignores the
> URBs unlinked in usb core.
> 
> This causes unexpected data loss in some cases. For example,
> runtime suspend entry will unlinked all urbs and set urb->status
> to -ENOENT even those urbs might have data not processed yet.
> Hence, data loss occurs.
> 
> This patch lets bulk-in callback function handle unlinked urbs
> to avoid data loss.
> 
> Signed-off-by: Tang Jian Qiang <jianqiang.tang@xxxxxxxxx>
> Signed-off-by: Lu Baolu <baolu.lu@xxxxxxxxxxxxxxx>
> Cc: stable@xxxxxxxxxxxxxxx
Acked-by: Oliver Neukum <oneukum@xxxxxxxx>



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