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[efi] Free transmit ring entry before calling netdev_tx_complete()

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The snpnet driver uses netdev_tx_defer() and so must ensure that space
in the (single-entry) transmit descriptor ring is freed up before
calling netdev_tx_complete().

Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
2014-10-16 14:09:27 +01:00
parent 86285d1d54
commit b71e93bb71
1 changed files with 3 additions and 1 deletions
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4
src/drivers/net/efi/snpnet.c
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@@ -185,6 +185,7 @@ static int snpnet_transmit ( struct net_device *netdev,
*/ */
static void snpnet_poll_tx ( struct net_device *netdev ) { static void snpnet_poll_tx ( struct net_device *netdev ) {
struct snp_nic *snp = netdev->priv; struct snp_nic *snp = netdev->priv;
struct io_buffer *iobuf;
UINT32 irq; UINT32 irq;
VOID *txbuf; VOID *txbuf;
EFI_STATUS efirc; EFI_STATUS efirc;
@@ -212,8 +213,9 @@ static void snpnet_poll_tx ( struct net_device *netdev ) {
} }
/* Complete transmission */ /* Complete transmission */
netdev_tx_complete ( netdev, snp->txbuf ); iobuf = snp->txbuf;
snp->txbuf = NULL; snp->txbuf = NULL;
netdev_tx_complete ( netdev, iobuf );
} }
/** /**