tree 887909e1f735bb444ef0e3e370f34401fa6eee02
parent d91c088b39e3c66d309938de858775bb90fd1ead
author Neil Horman <nhorman@tuxdriver.com> 1177077298 -0400
committer Jeff Garzik <jeff@garzik.org> 1177432987 -0400

sis900: Allocate rx replacement buffer before rx operation

	The sis900 driver appears to have a bug in which the receive routine
passes the skbuff holding the received frame to the network stack before
refilling the buffer in the rx ring.  If a new skbuff cannot be allocated, the
driver simply leaves a hole in the rx ring, which causes the driver to stop
receiving frames and become non-recoverable without an rmmod/insmod according to
reporters.  This patch reverses that order, attempting to allocate a replacement
buffer first, and receiving the new frame only if one can be allocated.  If no
skbuff can be allocated, the current skbuf in the rx ring is recycled, dropping
the current frame, but keeping the NIC operational.

Signed-off-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>