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SubjectRe: [PATCH] drivers/net/usb/r8152: change rtl8152_system_suspend to be void function
Hi zhong,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on net-next/master]
[also build test WARNING on v4.18-rc8 next-20180808]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url: https://github.com/0day-ci/linux/commits/zhong-jiang/drivers-net-usb-r8152-change-rtl8152_system_suspend-to-be-void-function/20180809-111737
config: i386-randconfig-x017-201831 (attached as .config)
compiler: gcc-7 (Debian 7.3.0-16) 7.3.0
reproduce:
# save the attached .config to linux build tree
make ARCH=i386

Note: it may well be a FALSE warning. FWIW you are at least aware of it now.
http://gcc.gnu.org/wiki/Better_Uninitialized_Warnings

All warnings (new ones prefixed by >>):

drivers/net//usb/r8152.c: In function 'rtl8152_suspend':
>> drivers/net//usb/r8152.c:4447:9: warning: 'ret' may be used uninitialized in this function [-Wmaybe-uninitialized]
return ret;
^~~

vim +/ret +4447 drivers/net//usb/r8152.c

8fb280616 hayeswang 2017-01-10 4432
8fb280616 hayeswang 2017-01-10 4433 static int rtl8152_suspend(struct usb_interface *intf, pm_message_t message)
8fb280616 hayeswang 2017-01-10 4434 {
8fb280616 hayeswang 2017-01-10 4435 struct r8152 *tp = usb_get_intfdata(intf);
8fb280616 hayeswang 2017-01-10 4436 int ret;
8fb280616 hayeswang 2017-01-10 4437
8fb280616 hayeswang 2017-01-10 4438 mutex_lock(&tp->control);
8fb280616 hayeswang 2017-01-10 4439
8fb280616 hayeswang 2017-01-10 4440 if (PMSG_IS_AUTO(message))
a9c54ad2c hayeswang 2017-01-25 4441 ret = rtl8152_runtime_suspend(tp);
8fb280616 hayeswang 2017-01-10 4442 else
31b61d6a0 zhong jiang 2018-08-08 4443 rtl8152_system_suspend(tp);
8fb280616 hayeswang 2017-01-10 4444
b54032736 hayeswang 2014-10-09 4445 mutex_unlock(&tp->control);
b54032736 hayeswang 2014-10-09 4446
6cc69f2a4 hayeswang 2014-10-17 @4447 return ret;
ac718b693 hayeswang 2013-05-02 4448 }
ac718b693 hayeswang 2013-05-02 4449

:::::: The code at line 4447 was first introduced by commit
:::::: 6cc69f2a404dea8641d6cf97c0fbe8d24579e259 r8152: return -EBUSY for runtime suspend

:::::: TO: hayeswang <hayeswang@realtek.com>
:::::: CC: David S. Miller <davem@davemloft.net>

---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation
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