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authorJulia Lawall <julia@diku.dk>2010-04-06 14:34:46 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2010-04-07 08:38:02 -0700
commitc70c036f04b7b74282477d6a51bbcc8bb8897e03 (patch)
tree9a5a42056298ef700f06c1608c7670982bb0aa87 /drivers/char/amiserial.c
parenta8557dc71949e80c298ec298b902ac6ebbc5d9dd (diff)
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.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/char/amiserial.c b/drivers/char/amiserial.c
index 6c32fbf0716..56b27671adc 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();