Re: [PATCH 1/4] [media] s3c-camif: Remove redundant NULL check

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On 04/30/2013 08:16 AM, Sachin Kamat wrote:
clk_unprepare checks for NULL pointer. Hence convert IS_ERR_OR_NULL
to IS_ERR only.

Signed-off-by: Sachin Kamat<sachin.kamat@xxxxxxxxxx>
---
  drivers/media/platform/s3c-camif/camif-core.c |    2 +-
  1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/media/platform/s3c-camif/camif-core.c b/drivers/media/platform/s3c-camif/camif-core.c
index 0d0fab1..2449f13 100644
--- a/drivers/media/platform/s3c-camif/camif-core.c
+++ b/drivers/media/platform/s3c-camif/camif-core.c
@@ -341,7 +341,7 @@ static void camif_clk_put(struct camif_dev *camif)
  	int i;

  	for (i = 0; i<  CLK_MAX_NUM; i++) {
-		if (IS_ERR_OR_NULL(camif->clock[i]))
+		if (IS_ERR(camif->clock[i]))
  			continue;
  		clk_unprepare(camif->clock[i]);
  		clk_put(camif->clock[i]);

Patch applied for 3.11 with following chunk squashed to it:

diff --git a/drivers/media/platform/s3c-camif/camif-core.c b/drivers/media/platform/s3c-camif/camif-core.c
index 2449f13..b385747 100644
--- a/drivers/media/platform/s3c-camif/camif-core.c
+++ b/drivers/media/platform/s3c-camif/camif-core.c
@@ -345,6 +345,7 @@ static void camif_clk_put(struct camif_dev *camif)
                        continue;
                clk_unprepare(camif->clock[i]);
                clk_put(camif->clock[i]);
+               camif->clock[i] = ERR_PTR(-EINVAL);
        }
 }

@@ -352,6 +353,9 @@ static int camif_clk_get(struct camif_dev *camif)
 {
        int ret, i;

+       for (i = 1; i < CLK_MAX_NUM; i++)
+               camif->clock[i] = ERR_PTR(-EINVAL);
+
        for (i = 0; i < CLK_MAX_NUM; i++) {
                camif->clock[i] = clk_get(camif->dev, camif_clocks[i]);
                if (IS_ERR(camif->clock[i])) {

Thanks!
Sylwester
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