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| author | Julia Lawall <julia@diku.dk> | 2010-04-06 14:34:46 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-04-07 08:38:02 -0700 |
| commit | c70c036f04b7b74282477d6a51bbcc8bb8897e03 (patch) | |
| tree | 9a5a42056298ef700f06c1608c7670982bb0aa87 /drivers/char/amiserial.c | |
| parent | a8557dc71949e80c298ec298b902ac6ebbc5d9dd (diff) | |
| download | kernel_samsung_smdk4412-c70c036f04b7b74282477d6a51bbcc8bb8897e03.zip kernel_samsung_smdk4412-c70c036f04b7b74282477d6a51bbcc8bb8897e03.tar.gz kernel_samsung_smdk4412-c70c036f04b7b74282477d6a51bbcc8bb8897e03.tar.bz2 | |
drivers/char/amiserial.c: add missing local_irq_restore
rs_init() is failing to restore interrupts on two error paths, and is
incorrectly calling tty_unregister_driver() with local interrupts
disabled.
Fix these things by disabling interrupts later, after the reauest_irq()
calls.
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 (...) { <+...
* local_irq_save (E1,...);
... when != E1
* return ...;
...+> }
// </smpl>
[akpm@linux-foundation.org: reimplement the fix]
Signed-off-by: Julia Lawall <julia@diku.dk>
Cc: Thadeu Lima de Souza Cascardo <cascardo@holoscopio.com>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/char/amiserial.c')
| -rw-r--r-- | drivers/char/amiserial.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/char/amiserial.c b/drivers/char/amiserial.c index 6c32fbf..56b2767 100644 --- a/drivers/char/amiserial.c +++ b/drivers/char/amiserial.c @@ -2021,8 +2021,6 @@ static int __init rs_init(void) state->baud_base = amiga_colorclock; state->xmit_fifo_size = 1; - local_irq_save(flags); - /* set ISRs, and then disable the rx interrupts */ error = request_irq(IRQ_AMIGA_TBE, ser_tx_int, 0, "serial TX", state); if (error) @@ -2033,6 +2031,8 @@ static int __init rs_init(void) if (error) goto fail_free_irq; + local_irq_save(flags); + /* turn off Rx and Tx interrupts */ custom.intena = IF_RBF | IF_TBE; mb(); |