tree 30f67f7dab8e59c32d42a949521972cb5a5dae6e
parent 8afb6c474b0dd8f9cf7e122a19c71924566fdb97
author Lars Persson <lars.persson@axis.com> 1456759351 +0100
committer David S. Miller <davem@davemloft.net> 1456948634 -0500

dwc_eth_qos: release descriptors outside netif_tx_lock

To prepare for using the CMA, we can not be in atomic context when
de-allocating DMA buffers.

The tx lock was needed only to protect the hw reset against the xmit
handler. Now we briefly grab the tx lock while stopping the queue to
make sure no thread is inside or will enter the xmit handler.

Signed-off-by: Lars Persson <larper@axis.com>
Signed-off-by: David S. Miller <davem@davemloft.net>