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| author | Dale Farnsworth <dale@farnsworth.org> | 2006-01-27 01:02:05 -0700 |
|---|---|---|
| committer | Jeff Garzik <jgarzik@pobox.com> | 2006-01-27 11:09:24 -0500 |
| commit | c7cd9014e6ea620bf9e1b52a22fadd7618b53276 (patch) | |
| tree | 4cf3c30c2c035934c6c25388462e7c2f2f904a59 /drivers/net/mv643xx_eth.c | |
| parent | efd51b5c6798d103e3aa683464aebb2019b62119 (diff) | |
| download | blackbird-op-linux-c7cd9014e6ea620bf9e1b52a22fadd7618b53276.tar.gz blackbird-op-linux-c7cd9014e6ea620bf9e1b52a22fadd7618b53276.zip | |
[PATCH] mv643xx_eth: Fix spinlock recursion bug
This patch eliminates a spinlock recursion bug introduced recently.
Since eth_port_send() is always called with the lock held, we simply
remove the locking inside the function itself.
Signed-off-by: Dale Farnsworth <dale@farnsworth.org>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
Diffstat (limited to 'drivers/net/mv643xx_eth.c')
| -rw-r--r-- | drivers/net/mv643xx_eth.c | 13 |
1 files changed, 0 insertions, 13 deletions
diff --git a/drivers/net/mv643xx_eth.c b/drivers/net/mv643xx_eth.c index 40ae36b20c9d..9eeb8db10af9 100644 --- a/drivers/net/mv643xx_eth.c +++ b/drivers/net/mv643xx_eth.c @@ -2617,7 +2617,6 @@ static ETH_FUNC_RET_STATUS eth_port_send(struct mv643xx_private *mp, struct eth_tx_desc *current_descriptor; struct eth_tx_desc *first_descriptor; u32 command; - unsigned long flags; /* Do not process Tx ring in case of Tx ring resource error */ if (mp->tx_resource_err) @@ -2634,8 +2633,6 @@ static ETH_FUNC_RET_STATUS eth_port_send(struct mv643xx_private *mp, return ETH_ERROR; } - spin_lock_irqsave(&mp->lock, flags); - mp->tx_ring_skbs++; BUG_ON(mp->tx_ring_skbs > mp->tx_ring_size); @@ -2685,15 +2682,11 @@ static ETH_FUNC_RET_STATUS eth_port_send(struct mv643xx_private *mp, mp->tx_resource_err = 1; mp->tx_curr_desc_q = tx_first_desc; - spin_unlock_irqrestore(&mp->lock, flags); - return ETH_QUEUE_LAST_RESOURCE; } mp->tx_curr_desc_q = tx_next_desc; - spin_unlock_irqrestore(&mp->lock, flags); - return ETH_OK; } #else @@ -2704,14 +2697,11 @@ static ETH_FUNC_RET_STATUS eth_port_send(struct mv643xx_private *mp, int tx_desc_used; struct eth_tx_desc *current_descriptor; unsigned int command_status; - unsigned long flags; /* Do not process Tx ring in case of Tx ring resource error */ if (mp->tx_resource_err) return ETH_QUEUE_FULL; - spin_lock_irqsave(&mp->lock, flags); - mp->tx_ring_skbs++; BUG_ON(mp->tx_ring_skbs > mp->tx_ring_size); @@ -2742,12 +2732,9 @@ static ETH_FUNC_RET_STATUS eth_port_send(struct mv643xx_private *mp, /* Check for ring index overlap in the Tx desc ring */ if (tx_desc_curr == tx_desc_used) { mp->tx_resource_err = 1; - - spin_unlock_irqrestore(&mp->lock, flags); return ETH_QUEUE_LAST_RESOURCE; } - spin_unlock_irqrestore(&mp->lock, flags); return ETH_OK; } #endif |
