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| author | Andy Fleming <afleming@freescale.com> | 2008-05-02 13:00:30 -0500 |
|---|---|---|
| committer | Jeff Garzik <jgarzik@redhat.com> | 2008-05-06 12:01:34 -0400 |
| commit | f162b9d58273a9a5747211133c8ccb2de5cf5ff2 (patch) | |
| tree | 1ee677ebfe4cc3ecf4e2b9deffda26a264c1426c /drivers/net/gianfar_sysfs.c | |
| parent | 569f0c4d909c7f73de634abcdc36344cb72de36a (diff) | |
| download | linux-f162b9d58273a9a5747211133c8ccb2de5cf5ff2.tar.gz linux-f162b9d58273a9a5747211133c8ccb2de5cf5ff2.tar.bz2 linux-f162b9d58273a9a5747211133c8ccb2de5cf5ff2.zip | |
gianfar: Fix a locking bug in gianfar's sysfs code
During sparse cleanup, found a locking bug. Some of the sysfs functions were
acquiring a lock, and then returning in the event of an error. We rearrange
the code so that the lock is released in error conditions, too.
Signed-off-by: Andy Fleming <afleming@freescale.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Diffstat (limited to 'drivers/net/gianfar_sysfs.c')
| -rw-r--r-- | drivers/net/gianfar_sysfs.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/drivers/net/gianfar_sysfs.c b/drivers/net/gianfar_sysfs.c index 230878b94190..5116f68e01b9 100644 --- a/drivers/net/gianfar_sysfs.c +++ b/drivers/net/gianfar_sysfs.c @@ -103,10 +103,10 @@ static ssize_t gfar_set_rx_stash_size(struct device *dev, spin_lock_irqsave(&priv->rxlock, flags); if (length > priv->rx_buffer_size) - return count; + goto out; if (length == priv->rx_stash_size) - return count; + goto out; priv->rx_stash_size = length; @@ -125,6 +125,7 @@ static ssize_t gfar_set_rx_stash_size(struct device *dev, gfar_write(&priv->regs->attr, temp); +out: spin_unlock_irqrestore(&priv->rxlock, flags); return count; @@ -154,10 +155,10 @@ static ssize_t gfar_set_rx_stash_index(struct device *dev, spin_lock_irqsave(&priv->rxlock, flags); if (index > priv->rx_stash_size) - return count; + goto out; if (index == priv->rx_stash_index) - return count; + goto out; priv->rx_stash_index = index; @@ -166,6 +167,7 @@ static ssize_t gfar_set_rx_stash_index(struct device *dev, temp |= ATTRELI_EI(index); gfar_write(&priv->regs->attreli, flags); +out: spin_unlock_irqrestore(&priv->rxlock, flags); return count; |