sfc: free multiple Rx buffers when required
When Rx packet data must be dropped, all the buffers associated with that Rx packet must be freed. Extend and rename efx_free_rx_buffer() to efx_free_rx_buffers() and loop through all the fragments. By doing so this patch fixes a possible memory leak. Signed-off-by: NShradha Shah <sshah@solarflare.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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