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ipmi: avoid gcc warning 

A new harmless warning has come up on ARM builds with gcc-4.9:

drivers/char/ipmi/ipmi_msghandler.c: In function 'smi_send.isra.11':
include/linux/spinlock.h:372:95: warning: 'flags' may be used uninitialized in this function [-Wmaybe-uninitialized]
  raw_spin_unlock_irqrestore(&lock->rlock, flags);
                                                                                               ^
drivers/char/ipmi/ipmi_msghandler.c:1490:16: note: 'flags' was declared here
  unsigned long flags;
                ^

This could be worked around by initializing the 'flags' variable, but it
seems better to rework the code to avoid this.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Fixes: 7ea0ed2b5b ("ipmi: Make the message handler easier to use for SMI interfaces")
Signed-off-by: Corey Minyard <cminyard@mvista.com>
This commit is contained in:
Arnd Bergmann 2015-01-28 16:00:11 +01:00 committed by Corey Minyard
parent 48862ea2ce
commit 191cc41405
1 changed files with 21 additions and 8 deletions
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29
drivers/char/ipmi/ipmi_msghandler.c
View File

@ -1483,14 +1483,10 @@ static inline void format_lan_msg(struct ipmi_smi_msg *smi_msg,
smi_msg->msgid = msgid;
}
static void smi_send(ipmi_smi_t intf, struct ipmi_smi_handlers *handlers,
struct ipmi_smi_msg *smi_msg, int priority)
static struct ipmi_smi_msg *smi_add_send_msg(ipmi_smi_t intf,
struct ipmi_smi_msg *smi_msg,
int priority)
{
int run_to_completion = intf->run_to_completion;
unsigned long flags;
if (!run_to_completion)
spin_lock_irqsave(&intf->xmit_msgs_lock, flags);
if (intf->curr_msg) {
if (priority > 0)
list_add_tail(&smi_msg->link, &intf->hp_xmit_msgs);
@ -1500,8 +1496,25 @@ static void smi_send(ipmi_smi_t intf, struct ipmi_smi_handlers *handlers,
} else {
intf->curr_msg = smi_msg;
}
if (!run_to_completion)
return smi_msg;
}
static void smi_send(ipmi_smi_t intf, struct ipmi_smi_handlers *handlers,
struct ipmi_smi_msg *smi_msg, int priority)
{
int run_to_completion = intf->run_to_completion;
if (run_to_completion) {
smi_msg = smi_add_send_msg(intf, smi_msg, priority);
} else {
unsigned long flags;
spin_lock_irqsave(&intf->xmit_msgs_lock, flags);
smi_msg = smi_add_send_msg(intf, smi_msg, priority);
spin_unlock_irqrestore(&intf->xmit_msgs_lock, flags);
}
if (smi_msg)
handlers->sender(intf->send_info, smi_msg);