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| author |   Igor Pylypiv <igor.pylypiv@gmail.com> | 2018-02-28 00:59:12 -0800 |
|---|---|---|
| committer |   Wim Van Sebroeck <wim@linux-watchdog.org> | 2018-03-03 15:52:32 +0100 |
| commit | 7bd3e7b743956afbec30fb525bc3c5e22e3d475c (patch) | |
| tree | 1b38e1f2d53c6551ec848486655dc4984434ed3e /drivers/watchdog/f71808e_wdt.c | |
| parent | watchdog: sp5100_tco.c: fix potential build failure (diff) | |
| download | linux-dev-7bd3e7b743956afbec30fb525bc3c5e22e3d475c.tar.xz linux-dev-7bd3e7b743956afbec30fb525bc3c5e22e3d475c.zip | |
watchdog: f71808e_wdt: Fix magic close handling
Watchdog close is "expected" when any byte is 'V' not just the last one.
Writing "V" to the device fails because the last byte is the end of string.
$ echo V > /dev/watchdog
f71808e_wdt: Unexpected close, not stopping watchdog!
Signed-off-by: Igor Pylypiv <igor.pylypiv@gmail.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
Diffstat (limited to 'drivers/watchdog/f71808e_wdt.c')
| -rw-r--r-- | drivers/watchdog/f71808e_wdt.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/watchdog/f71808e_wdt.c b/drivers/watchdog/f71808e_wdt.c index e0678c14480f..3a33c5344bd5 100644 --- a/drivers/watchdog/f71808e_wdt.c +++ b/drivers/watchdog/f71808e_wdt.c @@ -566,7 +566,8 @@ static ssize_t watchdog_write(struct file *file, const char __user *buf, char c; if (get_user(c, buf + i)) return -EFAULT; - expect_close = (c == 'V'); + if (c == 'V') + expect_close = true; } /* Properly order writes across fork()ed processes */ |