[PATCH v2 0/2] reset: Miscellaneous improvements

[PATCH v2 0/2] reset: Miscellaneous improvements

[Geert Uytterhoeven]

	Hi Philipp,

This patch series contains a resource optimization for the managed
helpers, and an enhancement to make the reset controller code more
uniform.

Changes compared to v1:
  - Use IS_ERR_OR_NULL(),
  - Drop accepted patch.

Thanks!

Geert Uytterhoeven (2):
  reset: Do not register resource data for missing resets
  reset: Align logic and flow in managed helpers

 drivers/reset/core.c | 35 ++++++++++++++++++-----------------
 1 file changed, 18 insertions(+), 17 deletions(-)

-- 
2.17.1

Gr{oetje,eeting}s,

						Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
							    -- Linus Torvalds

[PATCH v2 1/2] reset: Do not register resource data for missing resets

[Geert Uytterhoeven]

When an optional reset is not present, __devm_reset_control_get() and
devm_reset_control_array_get() still register resource data to release
the non-existing reset on cleanup, which is futile.

Fix this by skipping NULL reset control pointers.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
---
v2:
  - Use IS_ERR_OR_NULL().
---
 drivers/reset/core.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/reset/core.c b/drivers/reset/core.c
index c8cc8cacdade0391..7597c70e04d5b42b 100644
--- a/drivers/reset/core.c
+++ b/drivers/reset/core.c
@@ -787,7 +787,7 @@ struct reset_control *__devm_reset_control_get(struct device *dev,
 		return ERR_PTR(-ENOMEM);
 
 	rstc = __reset_control_get(dev, id, index, shared, optional, acquired);
-	if (!IS_ERR(rstc)) {
+	if (!IS_ERR_OR_NULL(rstc)) {
 		*ptr = rstc;
 		devres_add(dev, ptr);
 	} else {
@@ -928,7 +928,7 @@ devm_reset_control_array_get(struct device *dev, bool shared, bool optional)
 		return ERR_PTR(-ENOMEM);
 
 	rstc = of_reset_control_array_get(dev->of_node, shared, optional, true);
-	if (IS_ERR(rstc)) {
+	if (IS_ERR_OR_NULL(rstc)) {
 		devres_free(devres);
 		return rstc;
 	}
-- 
2.17.1

[PATCH v2 2/2] reset: Align logic and flow in managed helpers

[Geert Uytterhoeven]

__devm_reset_control_get() and devm_reset_control_array_get() are very
similar, but they do not look similar, due to inverted logic.
Make them more similar, following the "bail out early" paradigm.

Adjust the logic and flow in devm_reset_controller_register() to match
the two other functions.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
---
v2:
  - Use IS_ERR_OR_NULL().
---
 drivers/reset/core.c | 33 +++++++++++++++++----------------
 1 file changed, 17 insertions(+), 16 deletions(-)

diff --git a/drivers/reset/core.c b/drivers/reset/core.c
index 7597c70e04d5b42b..01c0c7aa835cbfe2 100644
--- a/drivers/reset/core.c
+++ b/drivers/reset/core.c
@@ -150,13 +150,14 @@ int devm_reset_controller_register(struct device *dev,
 		return -ENOMEM;
 
 	ret = reset_controller_register(rcdev);
-	if (!ret) {
-		*rcdevp = rcdev;
-		devres_add(dev, rcdevp);
-	} else {
+	if (ret) {
 		devres_free(rcdevp);
+		return ret;
 	}
 
+	*rcdevp = rcdev;
+	devres_add(dev, rcdevp);
+
 	return ret;
 }
 EXPORT_SYMBOL_GPL(devm_reset_controller_register);
@@ -787,13 +788,14 @@ struct reset_control *__devm_reset_control_get(struct device *dev,
 		return ERR_PTR(-ENOMEM);
 
 	rstc = __reset_control_get(dev, id, index, shared, optional, acquired);
-	if (!IS_ERR_OR_NULL(rstc)) {
-		*ptr = rstc;
-		devres_add(dev, ptr);
-	} else {
+	if (IS_ERR_OR_NULL(rstc)) {
 		devres_free(ptr);
+		return rstc;
 	}
 
+	*ptr = rstc;
+	devres_add(dev, ptr);
+
 	return rstc;
 }
 EXPORT_SYMBOL_GPL(__devm_reset_control_get);
@@ -919,22 +921,21 @@ EXPORT_SYMBOL_GPL(of_reset_control_array_get);
 struct reset_control *
 devm_reset_control_array_get(struct device *dev, bool shared, bool optional)
 {
-	struct reset_control **devres;
-	struct reset_control *rstc;
+	struct reset_control **ptr, *rstc;
 
-	devres = devres_alloc(devm_reset_control_release, sizeof(*devres),
-			      GFP_KERNEL);
-	if (!devres)
+	ptr = devres_alloc(devm_reset_control_release, sizeof(*ptr),
+			   GFP_KERNEL);
+	if (!ptr)
 		return ERR_PTR(-ENOMEM);
 
 	rstc = of_reset_control_array_get(dev->of_node, shared, optional, true);
 	if (IS_ERR_OR_NULL(rstc)) {
-		devres_free(devres);
+		devres_free(ptr);
 		return rstc;
 	}
 
-	*devres = rstc;
-	devres_add(dev, devres);
+	*ptr = rstc;
+	devres_add(dev, ptr);
 
 	return rstc;
 }
-- 
2.17.1