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pcmcia: fix error handling in cm4000_cs.c

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In the original code we used -ENODEV as the number of bytes to
copy_to_user() and we didn't release the locks.

Signed-off-by: Dan Carpenter <error27@gmail.com>
Acked-by: Harald Welte <laforge@gnumonks.org>
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
This commit is contained in:
Dan Carpenter 2010-04-18 22:07:33 +03:00 committed by Dominik Brodowski
parent 42d284b986
commit 07a71415d5
1 changed files with 5 additions and 3 deletions
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8
drivers/char/pcmcia/cm4000_cs.c
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@ -1026,14 +1026,16 @@ static ssize_t cmm_read(struct file *filp, __user char *buf, size_t count,
xoutb(0, REG_FLAGS1(iobase)); /* clear detectCMM */
/* last check before exit */
if (!io_detect_cm4000(iobase, dev))
count = -ENODEV;
if (!io_detect_cm4000(iobase, dev)) {
rc = -ENODEV;
goto release_io;
}
if (test_bit(IS_INVREV, &dev->flags) && count > 0)
str_invert_revert(dev->rbuf, count);
if (copy_to_user(buf, dev->rbuf, count))
return -EFAULT;
rc = -EFAULT;
release_io:
clear_bit(LOCK_IO, &dev->flags);