Hi Minyard,
I test this patch, it works.
Thanks.
On 2017/7/30 10:20, miny...@acm.org wrote:
From: Corey Minyard <cminy...@mvista.com>
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.
Reported-by: Weilong Chen <chenweil...@huawei.com>
Signed-off-by: Corey Minyard <cminy...@mvista.com>
---
I like to keep things consistent (though I obviously messed up here)
and keep variables that should be positive unsigned.
But you are right, there is a bug here and some inconsistency.
This patch changes timeout_period to be unsigned and fixes the
check. Can you try this out?
drivers/char/ipmi/ipmi_msghandler.c | 10 ++++++----
1 file changed, 6 insertions(+), 4 deletions(-)
diff --git a/drivers/char/ipmi/ipmi_msghandler.c
b/drivers/char/ipmi/ipmi_msghandler.c
index 810b138..c82d9fd 100644
--- a/drivers/char/ipmi/ipmi_msghandler.c
+++ b/drivers/char/ipmi/ipmi_msghandler.c
@@ -4030,7 +4030,8 @@ smi_from_recv_msg(ipmi_smi_t intf, struct ipmi_recv_msg
*recv_msg,
}
static void check_msg_timeout(ipmi_smi_t intf, struct seq_table *ent,
- struct list_head *timeouts, long timeout_period,
+ struct list_head *timeouts,
+ unsigned long timeout_period,
int slot, unsigned long *flags,
unsigned int *waiting_msgs)
{
@@ -4043,8 +4044,8 @@ static void check_msg_timeout(ipmi_smi_t intf, struct
seq_table *ent,
if (!ent->inuse)
return;
- ent->timeout -= timeout_period;
- if (ent->timeout > 0) {
+ if (timeout_period < ent->timeout) {
+ ent->timeout -= timeout_period;
(*waiting_msgs)++;
return;
}
@@ -4110,7 +4111,8 @@ static void check_msg_timeout(ipmi_smi_t intf, struct
seq_table *ent,
}
}
-static unsigned int ipmi_timeout_handler(ipmi_smi_t intf, long timeout_period)
+static unsigned int ipmi_timeout_handler(ipmi_smi_t intf,
+ unsigned long timeout_period)
{
struct list_head timeouts;
struct ipmi_recv_msg *msg, *msg2;
