[Intel-wired-lan] [PATCH S23 v2 08/15] ice: allow empty rx descriptors

[Bowers, AndrewX]

> -----Original Message-----
> From: Intel-wired-lan [mailto:intel-wired-lan-bounces at osuosl.org] On
> Behalf Of Tony Nguyen
> Sent: Friday, June 28, 2019 8:03 AM
> To: intel-wired-lan at lists.osuosl.org
> Subject: [Intel-wired-lan] [PATCH S23 v2 08/15] ice: allow empty rx
> descriptors
> 
> From: Mitch Williams <mitch.a.williams at intel.com>
> 
> In some circumstances, the hardware will hand us a receive descriptor which
> has no data attached, but is otherwise valid. The receive code was
> improperly ignoring these descriptors, which result in an infinite loop.
> 
> To fix this, change the receive code to process all descriptors, regardless of
> the size of the associated data. Add checks to the memory-handling
> functions to allow for zero size.
> 
> Signed-off-by: Mitch Williams <mitch.a.williams at intel.com>
> ---
>  drivers/net/ethernet/intel/ice/ice_txrx.c | 19 +++++++++++++++----
>  1 file changed, 15 insertions(+), 4 deletions(-)

Tested-by: Andrew Bowers <andrewx.bowers at intel.com>