diff options
| author | Julia Lawall <julia@diku.dk> | 2010-05-26 09:55:10 +0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-05-29 11:18:48 +0400 |
| commit | e72e9f3814cb8c1076d627c29cec90b005838ac3 (patch) | |
| tree | 312f828a60083afa2664d0cfc37115acb1986fd0 | |
| parent | 32f6249ba7d63d5d86dae930d63ca70ec11d59af (diff) | |
| download | linux-e72e9f3814cb8c1076d627c29cec90b005838ac3.tar.xz | |
drivers/isdn/hardware/mISDN: Add missing spin_unlock
Add a spin_unlock missing on the error path. The return value of write_reg
seems to be completely ignored, so it seems that the lock should be
released in every case.
The semantic match that finds this problem is as follows:
(http://coccinelle.lip6.fr/)
// <smpl>
@@
expression E1;
@@
* spin_lock(E1,...);
<+... when != E1
if (...) {
... when != E1
* return ...;
}
...+>
* spin_unlock(E1,...);
// </smpl>
Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/isdn/hardware/mISDN/hfcsusb.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/isdn/hardware/mISDN/hfcsusb.c b/drivers/isdn/hardware/mISDN/hfcsusb.c index b3b7e2879bac..8700474747e8 100644 --- a/drivers/isdn/hardware/mISDN/hfcsusb.c +++ b/drivers/isdn/hardware/mISDN/hfcsusb.c @@ -97,8 +97,10 @@ static int write_reg(struct hfcsusb *hw, __u8 reg, __u8 val) hw->name, __func__, reg, val); spin_lock(&hw->ctrl_lock); - if (hw->ctrl_cnt >= HFC_CTRL_BUFSIZE) + if (hw->ctrl_cnt >= HFC_CTRL_BUFSIZE) { + spin_unlock(&hw->ctrl_lock); return 1; + } buf = &hw->ctrl_buff[hw->ctrl_in_idx]; buf->hfcs_reg = reg; buf->reg_val = val; |