[media] s5p-jpeg: Use devm_* functions in jpeg-core.c file

devm_* functions are used to replace kzalloc, request_mem_region, ioremap
and request_irq functions in probe call. With the usage of devm_* functions
explicit freeing and unmapping is not required.

Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

2 files changed, 10 insertions, 50 deletions

diff --git a/drivers/media/video/s5p-jpeg/jpeg-core.c b/drivers/media/video/s5p-jpeg/jpeg-core.c
index 2d7dd8ac73f3..28b5225d94f5 100644
--- a/drivers/media/video/s5p-jpeg/jpeg-core.c
+++ b/drivers/media/video/s5p-jpeg/jpeg-core.c
@@ -1290,7 +1290,7 @@ static int s5p_jpeg_probe(struct platform_device *pdev)
         int ret;
 
         /* JPEG IP abstraction struct */
-        jpeg = kzalloc(sizeof(struct s5p_jpeg), GFP_KERNEL);
+        jpeg = devm_kzalloc(&pdev->dev, sizeof(struct s5p_jpeg), GFP_KERNEL);
         if (!jpeg)
                 return -ENOMEM;
 
@@ -1300,43 +1300,25 @@ static int s5p_jpeg_probe(struct platform_device *pdev)
 
         /* memory-mapped registers */
         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-        if (!res) {
-                dev_err(&pdev->dev, "cannot find IO resource\n");
-                ret = -ENOENT;
-                goto jpeg_alloc_rollback;
-        }
-
-        jpeg->ioarea = request_mem_region(res->start, resource_size(res),
-                                          pdev->name);
-        if (!jpeg->ioarea) {
-                dev_err(&pdev->dev, "cannot request IO\n");
-                ret = -ENXIO;
-                goto jpeg_alloc_rollback;
-        }
 
-        jpeg->regs = ioremap(res->start, resource_size(res));
-        if (!jpeg->regs) {
-                dev_err(&pdev->dev, "cannot map IO\n");
-                ret = -ENXIO;
-                goto mem_region_rollback;
+        jpeg->regs = devm_request_and_ioremap(&pdev->dev, res);
+        if (jpeg->regs == NULL) {
+                dev_err(&pdev->dev, "Failed to obtain io memory\n");
+                return -ENOENT;
         }
 
-        dev_dbg(&pdev->dev, "registers %p (%p, %p)\n",
-                jpeg->regs, jpeg->ioarea, res);
-
         /* interrupt service routine registration */
         jpeg->irq = ret = platform_get_irq(pdev, 0);
         if (ret < 0) {
                 dev_err(&pdev->dev, "cannot find IRQ\n");
-                goto ioremap_rollback;
+                return ret;
         }
 
-        ret = request_irq(jpeg->irq, s5p_jpeg_irq, 0,
-                          dev_name(&pdev->dev), jpeg);
-
+        ret = devm_request_irq(&pdev->dev, jpeg->irq, s5p_jpeg_irq, 0,
+                        dev_name(&pdev->dev), jpeg);
         if (ret) {
                 dev_err(&pdev->dev, "cannot claim IRQ %d\n", jpeg->irq);
-                goto ioremap_rollback;
+                return ret;
         }
 
         /* clocks */
@@ -1344,7 +1326,7 @@ static int s5p_jpeg_probe(struct platform_device *pdev)
         if (IS_ERR(jpeg->clk)) {
                 dev_err(&pdev->dev, "cannot get clock\n");
                 ret = PTR_ERR(jpeg->clk);
-                goto request_irq_rollback;
+                return ret;
         }
         dev_dbg(&pdev->dev, "clock source %p\n", jpeg->clk);
         clk_enable(jpeg->clk);
@@ -1464,18 +1446,6 @@ clk_get_rollback:
         clk_disable(jpeg->clk);
         clk_put(jpeg->clk);
 
-request_irq_rollback:
-        free_irq(jpeg->irq, jpeg);
-
-ioremap_rollback:
-        iounmap(jpeg->regs);
-
-mem_region_rollback:
-        release_resource(jpeg->ioarea);
-        release_mem_region(jpeg->ioarea->start, resource_size(jpeg->ioarea));
-
-jpeg_alloc_rollback:
-        kfree(jpeg);
         return ret;
 }
 
@@ -1496,14 +1466,6 @@ static int s5p_jpeg_remove(struct platform_device *pdev)
         clk_disable(jpeg->clk);
         clk_put(jpeg->clk);
 
-        free_irq(jpeg->irq, jpeg);
-
-        iounmap(jpeg->regs);
-
-        release_resource(jpeg->ioarea);
-        release_mem_region(jpeg->ioarea->start, resource_size(jpeg->ioarea));
-        kfree(jpeg);
-
         return 0;
 }
 
diff --git a/drivers/media/video/s5p-jpeg/jpeg-core.h b/drivers/media/video/s5p-jpeg/jpeg-core.h
index 38d7367f7a6d..9d0cd2b76f61 100644
--- a/drivers/media/video/s5p-jpeg/jpeg-core.h
+++ b/drivers/media/video/s5p-jpeg/jpeg-core.h
@@ -54,7 +54,6 @@
  * @vfd_encoder:        video device node for encoder mem2mem mode
  * @vfd_decoder:        video device node for decoder mem2mem mode
  * @m2m_dev:            v4l2 mem2mem device data
- * @ioarea:             JPEG IP memory region
  * @regs:               JPEG IP registers mapping
  * @irq:                JPEG IP irq
  * @clk:                JPEG IP clock
@@ -70,7 +69,6 @@ struct s5p_jpeg {
         struct video_device     *vfd_decoder;
         struct v4l2_m2m_dev     *m2m_dev;
 
-        struct resource         *ioarea;
         void __iomem            *regs;
         unsigned int            irq;
         struct clk              *clk;