diff options
author | Greg Kroah-Hartman <[email protected]> | 2017-10-09 09:02:35 +0200 |
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committer | Greg Kroah-Hartman <[email protected]> | 2017-10-09 09:02:35 +0200 |
commit | 1236d6bb6e19fc72ffc6bbcdeb1bfefe450e54ee (patch) | |
tree | 47da3feee8e263e8c9352c85cf518e624be3c211 /drivers/auxdisplay/panel.c | |
parent | 750b1a6894ecc9b178c6e3d0a1170122971b2036 (diff) | |
parent | 8a5776a5f49812d29fe4b2d0a2d71675c3facf3f (diff) |
Merge 4.14-rc4 into staging-next
We want the staging/iio fixes in here as well to handle merge issues.
Signed-off-by: Greg Kroah-Hartman <[email protected]>
Diffstat (limited to 'drivers/auxdisplay/panel.c')
-rw-r--r-- | drivers/auxdisplay/panel.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/drivers/auxdisplay/panel.c b/drivers/auxdisplay/panel.c index df126dcdaf18..6911acd896d9 100644 --- a/drivers/auxdisplay/panel.c +++ b/drivers/auxdisplay/panel.c @@ -1105,14 +1105,21 @@ static ssize_t keypad_read(struct file *file, static int keypad_open(struct inode *inode, struct file *file) { + int ret; + + ret = -EBUSY; if (!atomic_dec_and_test(&keypad_available)) - return -EBUSY; /* open only once at a time */ + goto fail; /* open only once at a time */ + ret = -EPERM; if (file->f_mode & FMODE_WRITE) /* device is read-only */ - return -EPERM; + goto fail; keypad_buflen = 0; /* flush the buffer on opening */ return 0; + fail: + atomic_inc(&keypad_available); + return ret; } static int keypad_release(struct inode *inode, struct file *file) |