From: Mark Rustad <MRustad@gmail.com>
This patch corrects the handling of write operations to the IPMI watchdog
to work as intended by returning the number of characters actually
processed. Without this patch, an "echo V >/dev/watchdog" enables the
watchdog if IPMI is providing the watchdog function.
Signed-off-by: Mark Rustad <MRustad@gmail.com>
---
I have not checked all of the watchdogs to see if there are others that have
this problem, but the one I was using before using the IPMI one did work
right. It was also a big surprise how much the default watchdog timeout
varies from one to another. Let me tell you that the 10 second default
for the IPMI watchdog was a real sore spot while tracking this problem down!
This problem goes back at least as far as 2.6.20, but I generated this patch
based on 2.6.26-rc9. I have applied, compiled and tested this fix.
drivers/char/ipmi/ipmi_watchdog.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
--- a/drivers/char/ipmi/ipmi_watchdog.c 2008-07-10 09:31:52.000000000 -0500
+++ b/drivers/char/ipmi/ipmi_watchdog.c 2008-07-10 09:33:41.000000000 -0500
@@ -755,9 +755,8 @@ static ssize_t ipmi_write(struct file *f
rv = ipmi_heartbeat();
if (rv)
return rv;
- return 1;
}
- return 0;
+ return len;
}
static ssize_t ipmi_read(struct file *file,
--
