[v4,2/10] pwm: mediatek: droping the check for of_device_get_match_data

Commit Message

Sam Shih (史碩三) Aug. 20, 2019, 1:40 a.m. UTC

From: sam shih <[e-mail]>

This patch drop the check for of_device_get_match_data.
Due to the only way call driver probe is compatible match,
In this case, the platform data should never be NULL.

Signed-off-by: Ryder Lee <[e-mail]>
Signed-off-by: Sam Shih <[e-mail]>
---
Used:
https://patchwork.kernel.org/patch/11096905/
Changes since v4:
Follow reviewer's comments:
Move the changes of droping the check for of_device_get_match_data
returning non-NULL to this patch
---
 drivers/pwm/pwm-mediatek.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

Comments

Uwe Kleine-König Aug. 20, 2019, 5:40 a.m. UTC | #1

Hello,

On Tue, Aug 20, 2019 at 09:40:17AM +0800, Sam Shih wrote:
> From: sam shih <[e-mail]>

Your Signed-off-by and the mail's From uses capital letters. Can you
please make them all match?

> This patch drop the check for of_device_get_match_data.
> Due to the only way call driver probe is compatible match,
> In this case, the platform data should never be NULL.

Yeah, all entries in the of_match_table have a .data pointer.
Theoretically the driver could be bound by driver.name and then
of_device_get_match_data returns NULL.

It's still ok to drop this check if you want to, I just want to make
sure this possibility is known.

Best regards
Uwe

Patch

diff --git a/drivers/pwm/pwm-mediatek.c b/drivers/pwm/pwm-mediatek.c
index 287fda3674ce..f9d67fb66adb 100644
--- a/drivers/pwm/pwm-mediatek.c
+++ b/drivers/pwm/pwm-mediatek.c
@@ -236,10 +236,7 @@  static int mtk_pwm_probe(struct platform_device *pdev)
 	if (!pc)
 		return -ENOMEM;
 
-	data = of_device_get_match_data(&pdev->dev);
-	if (data == NULL)
-		return -EINVAL;
-	pc->soc = data;
+	pc->soc = of_device_get_match_data(&pdev->dev);
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	pc->regs = devm_ioremap_resource(&pdev->dev, res);