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| author | Harvey Harrison <harvey.harrison@gmail.com> | 2008-04-30 00:53:50 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-04-30 08:29:44 -0700 |
| commit | d3ceb6562bfbe8f27fa32d1e24eea0e2d4de0347 (patch) | |
| tree | 25a213062b9dd40361984a83f7b2c16a5e5edf8c /drivers/char/esp.c | |
| parent | f5592268a5aa5e02f36f396de47c94a1506e3678 (diff) | |
| download | linux-d3ceb6562bfbe8f27fa32d1e24eea0e2d4de0347.tar.gz linux-d3ceb6562bfbe8f27fa32d1e24eea0e2d4de0347.tar.bz2 linux-d3ceb6562bfbe8f27fa32d1e24eea0e2d4de0347.zip | |
char: esp.c: fix possible double-unlock
Hitting either of the break statements in the while loop would cause a
double-unlock of info->lock.
[Jiri Slaby suggested simply returning is safe here, rather than a goto]
Noticed by sparse:
drivers/char/esp.c:2042:2: warning: context imbalance in 'rs_wait_until_sent' - unexpected unlock
Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Cc: Jiri Slaby <jirislaby@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/char/esp.c')
| -rw-r--r-- | drivers/char/esp.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/char/esp.c b/drivers/char/esp.c index 763d6d2e4b62..662e9cfdcc96 100644 --- a/drivers/char/esp.c +++ b/drivers/char/esp.c @@ -2040,10 +2040,10 @@ static void rs_wait_until_sent(struct tty_struct *tty, int timeout) msleep_interruptible(jiffies_to_msecs(char_time)); if (signal_pending(current)) - break; + return; if (timeout && time_after(jiffies, orig_jiffies + timeout)) - break; + return; spin_lock_irqsave(&info->lock, flags); serial_out(info, UART_ESI_CMD1, ESI_NO_COMMAND); |