[PATCH] crypto: sun4i-ss - simplify optional reset handling

[PATCH] crypto: sun4i-ss - simplify optional reset handling

[Philipp Zabel]

As of commit bb475230b8e5 ("reset: make optional functions really
optional"), the reset framework API calls use NULL pointers to describe
optional, non-present reset controls.

This allows to unconditionally return errors from
devm_reset_control_get_optional_exclusive.

Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
---
 .../crypto/allwinner/sun4i-ss/sun4i-ss-core.c | 21 +++++++------------
 1 file changed, 8 insertions(+), 13 deletions(-)

diff --git a/drivers/crypto/allwinner/sun4i-ss/sun4i-ss-core.c b/drivers/crypto/allwinner/sun4i-ss/sun4i-ss-core.c
index 709905ec4680..ef224d5e4903 100644
--- a/drivers/crypto/allwinner/sun4i-ss/sun4i-ss-core.c
+++ b/drivers/crypto/allwinner/sun4i-ss/sun4i-ss-core.c
@@ -288,8 +288,7 @@ static int sun4i_ss_pm_suspend(struct device *dev)
 {
 	struct sun4i_ss_ctx *ss = dev_get_drvdata(dev);
 
-	if (ss->reset)
-		reset_control_assert(ss->reset);
+	reset_control_assert(ss->reset);
 
 	clk_disable_unprepare(ss->ssclk);
 	clk_disable_unprepare(ss->busclk);
@@ -314,12 +313,10 @@ static int sun4i_ss_pm_resume(struct device *dev)
 		goto err_enable;
 	}
 
-	if (ss->reset) {
-		err = reset_control_deassert(ss->reset);
-		if (err) {
-			dev_err(ss->dev, "Cannot deassert reset control\n");
-			goto err_enable;
-		}
+	err = reset_control_deassert(ss->reset);
+	if (err) {
+		dev_err(ss->dev, "Cannot deassert reset control\n");
+		goto err_enable;
 	}
 
 	return err;
@@ -401,12 +398,10 @@ static int sun4i_ss_probe(struct platform_device *pdev)
 	dev_dbg(&pdev->dev, "clock ahb_ss acquired\n");
 
 	ss->reset = devm_reset_control_get_optional(&pdev->dev, "ahb");
-	if (IS_ERR(ss->reset)) {
-		if (PTR_ERR(ss->reset) == -EPROBE_DEFER)
-			return PTR_ERR(ss->reset);
+	if (IS_ERR(ss->reset))
+		return PTR_ERR(ss->reset);
+	if (!ss->reset)
 		dev_info(&pdev->dev, "no reset control found\n");
-		ss->reset = NULL;
-	}
 
 	/*
 	 * Check that clock have the correct rates given in the datasheet
-- 
2.29.2

Re: [PATCH] crypto: sun4i-ss - simplify optional reset handling

[Herbert Xu]

On Fri, Mar 05, 2021 at 10:12:36AM +0100, Philipp Zabel wrote:
> As of commit bb475230b8e5 ("reset: make optional functions really
> optional"), the reset framework API calls use NULL pointers to describe
> optional, non-present reset controls.
> 
> This allows to unconditionally return errors from
> devm_reset_control_get_optional_exclusive.
> 
> Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
> ---
>  .../crypto/allwinner/sun4i-ss/sun4i-ss-core.c | 21 +++++++------------
>  1 file changed, 8 insertions(+), 13 deletions(-)

Patch applied.  Thanks.
-- 
Email: Herbert Xu <herbert@gondor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt