[media] V4L: soc-camera: split a function into two

The soc_camera_power_set() function processes two cases: power on anf off.
These two cases don't share and common code, and the function is always
called with a constant power on / off argument. Splitting this function
into two removes a condition check, reduces indentation levels and makes
the code look cleaner.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 34 insertions, 31 deletions

diff --git a/drivers/media/video/soc_camera.c b/drivers/media/video/soc_camera.c
index 8d5c421a803..d3eeb08be32 100644
--- a/drivers/media/video/soc_camera.c
+++ b/drivers/media/video/soc_camera.c
@@ -50,49 +50,52 @@ static LIST_HEAD(hosts);
 static LIST_HEAD(devices);
 static DEFINE_MUTEX(list_lock);         /* Protects the list of hosts */
 
-static int soc_camera_power_set(struct soc_camera_device *icd,
-                                struct soc_camera_link *icl,
-                                int power_on)
+static int soc_camera_power_on(struct soc_camera_device *icd,
+                               struct soc_camera_link *icl)
 {
         int ret;
 
-        if (power_on) {
-                ret = regulator_bulk_enable(icl->num_regulators,
-                                            icl->regulators);
-                if (ret < 0) {
-                        dev_err(icd->pdev, "Cannot enable regulators\n");
-                        return ret;
-                }
+        ret = regulator_bulk_enable(icl->num_regulators,
+                                    icl->regulators);
+        if (ret < 0) {
+                dev_err(icd->pdev, "Cannot enable regulators\n");
+                return ret;
+        }
 
-                if (icl->power)
-                        ret = icl->power(icd->pdev, power_on);
+        if (icl->power) {
+                ret = icl->power(icd->pdev, 1);
                 if (ret < 0) {
                         dev_err(icd->pdev,
                                 "Platform failed to power-on the camera.\n");
 
                         regulator_bulk_disable(icl->num_regulators,
                                                icl->regulators);
-                        return ret;
                 }
-        } else {
-                ret = 0;
-                if (icl->power)
-                        ret = icl->power(icd->pdev, 0);
+        }
+
+        return ret;
+}
+
+static int soc_camera_power_off(struct soc_camera_device *icd,
+                                struct soc_camera_link *icl)
+{
+        int ret;
+
+        if (icl->power) {
+                ret = icl->power(icd->pdev, 0);
                 if (ret < 0) {
                         dev_err(icd->pdev,
                                 "Platform failed to power-off the camera.\n");
                         return ret;
                 }
-
-                ret = regulator_bulk_disable(icl->num_regulators,
-                                             icl->regulators);
-                if (ret < 0) {
-                        dev_err(icd->pdev, "Cannot disable regulators\n");
-                        return ret;
-                }
         }
 
-        return 0;
+        ret = regulator_bulk_disable(icl->num_regulators,
+                                     icl->regulators);
+        if (ret < 0)
+                dev_err(icd->pdev, "Cannot disable regulators\n");
+
+        return ret;
 }
 
 const struct soc_camera_format_xlate *soc_camera_xlate_by_fourcc(
@@ -502,7 +505,7 @@ static int soc_camera_open(struct file *file)
                         },
                 };
 
-                ret = soc_camera_power_set(icd, icl, 1);
+                ret = soc_camera_power_on(icd, icl);
                 if (ret < 0)
                         goto epower;
 
@@ -556,7 +559,7 @@ esfmt:
 eresume:
         ici->ops->remove(icd);
 eiciadd:
-        soc_camera_power_set(icd, icl, 0);
+        soc_camera_power_off(icd, icl);
 epower:
         icd->use_count--;
         module_put(ici->ops->owner);
@@ -580,7 +583,7 @@ static int soc_camera_close(struct file *file)
                 if (ici->ops->init_videobuf2)
                         vb2_queue_release(&icd->vb2_vidq);
 
-                soc_camera_power_set(icd, icl, 0);
+                soc_camera_power_off(icd, icl);
         }
 
         if (icd->streamer == file)
@@ -1026,7 +1029,7 @@ static int soc_camera_probe(struct soc_camera_device *icd)
         if (ret < 0)
                 goto ereg;
 
-        ret = soc_camera_power_set(icd, icl, 1);
+        ret = soc_camera_power_on(icd, icl);
         if (ret < 0)
                 goto epower;
 
@@ -1106,7 +1109,7 @@ static int soc_camera_probe(struct soc_camera_device *icd)
 
         ici->ops->remove(icd);
 
-        soc_camera_power_set(icd, icl, 0);
+        soc_camera_power_off(icd, icl);
 
         mutex_unlock(&icd->video_lock);
 
@@ -1129,7 +1132,7 @@ eadddev:
 evdc:
         ici->ops->remove(icd);
 eadd:
-        soc_camera_power_set(icd, icl, 0);
+        soc_camera_power_off(icd, icl);
 epower:
         regulator_bulk_free(icl->num_regulators, icl->regulators);
 ereg: