diff options
| author | David S. Miller <davem@davemloft.net> | 2008-07-18 02:39:39 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2008-07-18 02:39:39 -0700 |
| commit | 49997d75152b3d23c53b0fa730599f2f74c92c65 (patch) | |
| tree | 46e93126170d02cfec9505172e545732c1b69656 /drivers/net/wan | |
| parent | a0c80b80e0fb48129e4e9d6a9ede914f9ff1850d (diff) | |
| parent | 5b664cb235e97afbf34db9c4d77f08ebd725335e (diff) | |
Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6
Conflicts:
Documentation/powerpc/booting-without-of.txt
drivers/atm/Makefile
drivers/net/fs_enet/fs_enet-main.c
drivers/pci/pci-acpi.c
net/8021q/vlan.c
net/iucv/iucv.c
Diffstat (limited to 'drivers/net/wan')
| -rw-r--r-- | drivers/net/wan/cosa.c | 22 |
1 files changed, 16 insertions, 6 deletions
diff --git a/drivers/net/wan/cosa.c b/drivers/net/wan/cosa.c index b0fce1387eaf..5827324e9d9f 100644 --- a/drivers/net/wan/cosa.c +++ b/drivers/net/wan/cosa.c @@ -92,6 +92,7 @@ #include <linux/spinlock.h> #include <linux/mutex.h> #include <linux/device.h> +#include <linux/smp_lock.h> #undef COSA_SLOW_IO /* for testing purposes only */ @@ -970,15 +971,21 @@ static int cosa_open(struct inode *inode, struct file *file) struct channel_data *chan; unsigned long flags; int n; + int ret = 0; + lock_kernel(); if ((n=iminor(file->f_path.dentry->d_inode)>>CARD_MINOR_BITS) - >= nr_cards) - return -ENODEV; + >= nr_cards) { + ret = -ENODEV; + goto out; + } cosa = cosa_cards+n; if ((n=iminor(file->f_path.dentry->d_inode) - & ((1<<CARD_MINOR_BITS)-1)) >= cosa->nchannels) - return -ENODEV; + & ((1<<CARD_MINOR_BITS)-1)) >= cosa->nchannels) { + ret = -ENODEV; + goto out; + } chan = cosa->chan + n; file->private_data = chan; @@ -987,7 +994,8 @@ static int cosa_open(struct inode *inode, struct file *file) if (chan->usage < 0) { /* in netdev mode */ spin_unlock_irqrestore(&cosa->lock, flags); - return -EBUSY; + ret = -EBUSY; + goto out; } cosa->usage++; chan->usage++; @@ -996,7 +1004,9 @@ static int cosa_open(struct inode *inode, struct file *file) chan->setup_rx = chrdev_setup_rx; chan->rx_done = chrdev_rx_done; spin_unlock_irqrestore(&cosa->lock, flags); - return 0; +out: + unlock_kernel(); + return ret; } static int cosa_release(struct inode *inode, struct file *file) |