Message ID | 20230427133350.31064-8-oneukum@suse.com |
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State | New |
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Series |
[1/8] pwcd_usb: fix error handling in probe
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Commit Message
Oliver Neukum
April 27, 2023, 1:33 p.m. UTC
Delays between altering the watchdog
and giving the keepalive need to be controlled.
Do not allow preemption.
Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Signed-off-by: Oliver Neukum <oneukum@suse.com>
---
drivers/watchdog/pcwd_usb.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/watchdog/pcwd_usb.c b/drivers/watchdog/pcwd_usb.c index 50ba88019ed6..09cae7a6ad07 100644 --- a/drivers/watchdog/pcwd_usb.c +++ b/drivers/watchdog/pcwd_usb.c @@ -459,10 +459,14 @@ static long usb_pcwd_ioctl(struct file *file, unsigned int cmd, if (get_user(new_heartbeat, p)) return -EFAULT; - if (usb_pcwd_set_heartbeat(usb_pcwd_device, new_heartbeat)) + preempt_disable(); /* we are on a clock now */ + if (usb_pcwd_set_heartbeat(usb_pcwd_device, new_heartbeat)) { + preempt_enable(); return -EINVAL; + } usb_pcwd_keepalive(usb_pcwd_device); + preempt_enable(); } fallthrough;