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Subject[PATCH] ipmi: fix unsigned long overflow
Date
When I set the timeout to a specific value such as 500ms, the timeout
event will not happen in time due to the overflow in function
check_msg_timeout:
...
ent->timeout -= timeout_period;
if (ent->timeout > 0)
return;
...

The type of timeout_period is long, but ent->timeout is unsigned long.
This patch makes the type consistent.

Signed-off-by: Weilong Chen <chenweilong@huawei.com>
---
drivers/char/ipmi/ipmi_msghandler.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/char/ipmi/ipmi_msghandler.c b/drivers/char/ipmi/ipmi_msghandler.c
index 810b138..4c806e9 100644
--- a/drivers/char/ipmi/ipmi_msghandler.c
+++ b/drivers/char/ipmi/ipmi_msghandler.c
@@ -135,8 +135,8 @@ struct seq_table {
unsigned int inuse : 1;
unsigned int broadcast : 1;

- unsigned long timeout;
- unsigned long orig_timeout;
+ long timeout;
+ long orig_timeout;
unsigned int retries_left;

/*
--
1.8.3.1
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