This allows to drop the .remove() function as it only exists to
unregister the watchdog device which is now done in a callback
registered by devm_watchdog_register_device().
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
---
drivers/watchdog/wm8350_wdt.c | 9 +--------
1 file changed, 1 insertion(+), 8 deletions(-)
diff --git a/drivers/watchdog/wm8350_wdt.c b/drivers/watchdog/wm8350_wdt.c
index 33c62d51f00a..911ad64460a6 100644
--- a/drivers/watchdog/wm8350_wdt.c
+++ b/drivers/watchdog/wm8350_wdt.c
@@ -153,18 +153,11 @@ static int wm8350_wdt_probe(struct platform_device *pdev)
/* Default to 4s timeout */
wm8350_wdt_set_timeout(&wm8350_wdt, 4);
- return watchdog_register_device(&wm8350_wdt);
-}
-
-static int wm8350_wdt_remove(struct platform_device *pdev)
-{
- watchdog_unregister_device(&wm8350_wdt);
- return 0;
+ return devm_watchdog_register_device(&wm8350_wdt);
}
static struct platform_driver wm8350_wdt_driver = {
.probe = wm8350_wdt_probe,
- .remove = wm8350_wdt_remove,
.driver = {
.name = "wm8350-wdt",
},
--
2.39.1
Hi Uwe,
I love your patch! Yet something to improve:
[auto build test ERROR on fe15c26ee26efa11741a7b632e9f23b01aca4cc6]
url: https://github.com/intel-lab-lkp/linux/commits/Uwe-Kleine-K-nig/watchdog-bcm47xx-Simplify-using-devm_watchdog_register_device/20230307-011628
base: fe15c26ee26efa11741a7b632e9f23b01aca4cc6
patch link: https://lore.kernel.org/r/20230306170901.2232323-4-u.kleine-koenig%40pengutronix.de
patch subject: [PATCH 3/3] watchdog: wm8350: Simplify using devm_watchdog_register_device()
config: ia64-allyesconfig (https://download.01.org/0day-ci/archive/20230307/202303070325.74bkgnG6-lkp@intel.com/config)
compiler: ia64-linux-gcc (GCC) 12.1.0
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# https://github.com/intel-lab-lkp/linux/commit/94594fa75b3515d5dbff3ec2d1db1cf5627900b1
git remote add linux-review https://github.com/intel-lab-lkp/linux
git fetch --no-tags linux-review Uwe-Kleine-K-nig/watchdog-bcm47xx-Simplify-using-devm_watchdog_register_device/20230307-011628
git checkout 94594fa75b3515d5dbff3ec2d1db1cf5627900b1
# save the config file
mkdir build_dir && cp config build_dir/.config
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=ia64 olddefconfig
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=ia64 SHELL=/bin/bash drivers/
If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>
| Link: https://lore.kernel.org/oe-kbuild-all/202303070325.74bkgnG6-lkp@intel.com/
All errors (new ones prefixed by >>):
drivers/watchdog/wm8350_wdt.c: In function 'wm8350_wdt_probe':
>> drivers/watchdog/wm8350_wdt.c:156:46: error: passing argument 1 of 'devm_watchdog_register_device' from incompatible pointer type [-Werror=incompatible-pointer-types]
156 | return devm_watchdog_register_device(&wm8350_wdt);
| ^~~~~~~~~~~
| |
| struct watchdog_device *
In file included from drivers/watchdog/wm8350_wdt.c:15:
include/linux/watchdog.h:226:50: note: expected 'struct device *' but argument is of type 'struct watchdog_device *'
226 | int devm_watchdog_register_device(struct device *dev, struct watchdog_device *);
| ~~~~~~~~~~~~~~~^~~
>> drivers/watchdog/wm8350_wdt.c:156:16: error: too few arguments to function 'devm_watchdog_register_device'
156 | return devm_watchdog_register_device(&wm8350_wdt);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/watchdog.h:226:5: note: declared here
226 | int devm_watchdog_register_device(struct device *dev, struct watchdog_device *);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/watchdog/wm8350_wdt.c:157:1: error: control reaches end of non-void function [-Werror=return-type]
157 | }
| ^
cc1: some warnings being treated as errors
vim +/devm_watchdog_register_device +156 drivers/watchdog/wm8350_wdt.c
139
140 static int wm8350_wdt_probe(struct platform_device *pdev)
141 {
142 struct wm8350 *wm8350 = platform_get_drvdata(pdev);
143
144 if (!wm8350) {
145 pr_err("No driver data supplied\n");
146 return -ENODEV;
147 }
148
149 watchdog_set_nowayout(&wm8350_wdt, nowayout);
150 watchdog_set_drvdata(&wm8350_wdt, wm8350);
151 wm8350_wdt.parent = &pdev->dev;
152
153 /* Default to 4s timeout */
154 wm8350_wdt_set_timeout(&wm8350_wdt, 4);
155
> 156 return devm_watchdog_register_device(&wm8350_wdt);
157 }
158
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests
On Mon, Mar 06, 2023 at 06:09:01PM +0100, Uwe Kleine-König wrote:
> This allows to drop the .remove() function as it only exists to
> unregister the watchdog device which is now done in a callback
> registered by devm_watchdog_register_device().
>
> Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
> ---
> drivers/watchdog/wm8350_wdt.c | 9 +--------
> 1 file changed, 1 insertion(+), 8 deletions(-)
>
> diff --git a/drivers/watchdog/wm8350_wdt.c b/drivers/watchdog/wm8350_wdt.c
> index 33c62d51f00a..911ad64460a6 100644
> --- a/drivers/watchdog/wm8350_wdt.c
> +++ b/drivers/watchdog/wm8350_wdt.c
> @@ -153,18 +153,11 @@ static int wm8350_wdt_probe(struct platform_device *pdev)
> /* Default to 4s timeout */
> wm8350_wdt_set_timeout(&wm8350_wdt, 4);
>
> - return watchdog_register_device(&wm8350_wdt);
> -}
> -
> -static int wm8350_wdt_remove(struct platform_device *pdev)
> -{
> - watchdog_unregister_device(&wm8350_wdt);
> - return 0;
> + return devm_watchdog_register_device(&wm8350_wdt);
> }
>
> static struct platform_driver wm8350_wdt_driver = {
> .probe = wm8350_wdt_probe,
> - .remove = wm8350_wdt_remove,
> .driver = {
> .name = "wm8350-wdt",
> },
> --
> 2.39.1
>
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