diff options
| author | Julia Lawall <julia@diku.dk> | 2010-04-06 14:34:48 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-04-07 08:38:02 -0700 |
| commit | 2a481800caf78f4750cc673c8baed12b5d703ff6 (patch) | |
| tree | 7ddbde66351fdf26c262fe8127a98704284e9456 /drivers/gpio/timbgpio.c | |
| parent | c70c036f04b7b74282477d6a51bbcc8bb8897e03 (diff) | |
| download | blackbird-op-linux-2a481800caf78f4750cc673c8baed12b5d703ff6.tar.gz blackbird-op-linux-2a481800caf78f4750cc673c8baed12b5d703ff6.zip | |
drivers/gpio/timbgpio.c: add missing unlock
In an error handling case the lock is not unlocked. The return is
converted to a goto, to share the unlock at the end of the function.
A simplified version of the semantic patch that finds this problem is as
follows: (http://coccinelle.lip6.fr/)
// <smpl>
@r exists@
expression E1;
identifier f;
@@
f (...) { <+...
* spin_lock_irqsave (E1,...);
... when != E1
* return ...;
...+> }
// </smpl>
Signed-off-by: Julia Lawall <julia@diku.dk>
Cc: <richard.rojfors@pelagicore.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/gpio/timbgpio.c')
| -rw-r--r-- | drivers/gpio/timbgpio.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/drivers/gpio/timbgpio.c b/drivers/gpio/timbgpio.c index ac4d0f0ea02b..ddd053108a13 100644 --- a/drivers/gpio/timbgpio.c +++ b/drivers/gpio/timbgpio.c @@ -131,6 +131,7 @@ static int timbgpio_irq_type(unsigned irq, unsigned trigger) unsigned long flags; u32 lvr, flr, bflr = 0; u32 ver; + int ret = 0; if (offset < 0 || offset > tgpio->gpio.ngpio) return -EINVAL; @@ -154,8 +155,10 @@ static int timbgpio_irq_type(unsigned irq, unsigned trigger) } if ((trigger & IRQ_TYPE_EDGE_BOTH) == IRQ_TYPE_EDGE_BOTH) { - if (ver < 3) - return -EINVAL; + if (ver < 3) { + ret = -EINVAL; + goto out; + } else { flr |= 1 << offset; bflr |= 1 << offset; @@ -175,9 +178,10 @@ static int timbgpio_irq_type(unsigned irq, unsigned trigger) iowrite32(bflr, tgpio->membase + TGPIO_BFLR); iowrite32(1 << offset, tgpio->membase + TGPIO_ICR); - spin_unlock_irqrestore(&tgpio->lock, flags); - return 0; +out: + spin_unlock_irqrestore(&tgpio->lock, flags); + return ret; } static void timbgpio_irq(unsigned int irq, struct irq_desc *desc) |
