[PATCH] Input: wm97xx: Simplify resource management

[PATCH] Input: wm97xx: Simplify resource management

[Christophe JAILLET]

Since the commit in the Fixes tag below, 'wm->input_dev' is a managed
resource that doesn't need to be explicitly unregistered or freed (see
devm_input_allocate_device() documentation)

So, remove some unless line of code to slightly simplify it.

Fixes: c72f61e74073 ("Input: wm97xx: split out touchscreen registering")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
---
Compile tested only
---
 drivers/input/touchscreen/wm97xx-core.c | 12 +++---------
 1 file changed, 3 insertions(+), 9 deletions(-)

diff --git a/drivers/input/touchscreen/wm97xx-core.c b/drivers/input/touchscreen/wm97xx-core.c
index 78d2ee99f37a..1b58611c8084 100644
--- a/drivers/input/touchscreen/wm97xx-core.c
+++ b/drivers/input/touchscreen/wm97xx-core.c
@@ -615,10 +615,9 @@ static int wm97xx_register_touch(struct wm97xx *wm)
 	 * extensions)
 	 */
 	wm->touch_dev = platform_device_alloc("wm97xx-touch", -1);
-	if (!wm->touch_dev) {
-		ret = -ENOMEM;
-		goto touch_err;
-	}
+	if (!wm->touch_dev)
+		return -ENOMEM;
+
 	platform_set_drvdata(wm->touch_dev, wm);
 	wm->touch_dev->dev.parent = wm->dev;
 	wm->touch_dev->dev.platform_data = pdata;
@@ -629,9 +628,6 @@ static int wm97xx_register_touch(struct wm97xx *wm)
 	return 0;
 touch_reg_err:
 	platform_device_put(wm->touch_dev);
-touch_err:
-	input_unregister_device(wm->input_dev);
-	wm->input_dev = NULL;
 
 	return ret;
 }
@@ -639,8 +635,6 @@ static int wm97xx_register_touch(struct wm97xx *wm)
 static void wm97xx_unregister_touch(struct wm97xx *wm)
 {
 	platform_device_unregister(wm->touch_dev);
-	input_unregister_device(wm->input_dev);
-	wm->input_dev = NULL;
 }
 
 static int _wm97xx_probe(struct wm97xx *wm)
-- 
2.32.0

Re: [PATCH] Input: wm97xx: Simplify resource management

[Charles Keepax]

On Sun, Jan 30, 2022 at 09:06:36AM +0100, Christophe JAILLET wrote:
> Since the commit in the Fixes tag below, 'wm->input_dev' is a managed
> resource that doesn't need to be explicitly unregistered or freed (see
> devm_input_allocate_device() documentation)
> 
> So, remove some unless line of code to slightly simplify it.
> 
> Fixes: c72f61e74073 ("Input: wm97xx: split out touchscreen registering")
> Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
> ---

Acked-by: Charles Keepax <ckeepax@opensource.cirrus.com>

Thanks,
Charles

Re: [PATCH] Input: wm97xx: Simplify resource management

[Mark Brown]

On Sun, 30 Jan 2022 09:06:36 +0100, Christophe JAILLET wrote:
> Since the commit in the Fixes tag below, 'wm->input_dev' is a managed
> resource that doesn't need to be explicitly unregistered or freed (see
> devm_input_allocate_device() documentation)
> 
> So, remove some unless line of code to slightly simplify it.
> 
> 
> [...]

Applied to

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git for-linus

Thanks!

[1/1] Input: wm97xx: Simplify resource management
      commit: a4f399a1416f645ac701064a55b0cb5203707ac9

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark