[PATCH v3 2/9] media: davinci: vpif: Convert to devm_* api

[Prabhakar Lad]

From: Lad, Prabhakar <prabhakar.cse...@gmail.com>

Use devm_ioremap_resource instead of reques_mem_region()/ioremap().
This ensures more consistent error values and simplifies error paths.

Signed-off-by: Lad, Prabhakar <prabhakar.cse...@gmail.com>
Acked-by: Laurent Pinchart <laurent.pinch...@ideasonboard.com>
---
 drivers/media/platform/davinci/vpif.c |   27 ++++-----------------------
 1 files changed, 4 insertions(+), 23 deletions(-)

diff --git a/drivers/media/platform/davinci/vpif.c 
b/drivers/media/platform/davinci/vpif.c
index 761c825..f857d8f 100644
--- a/drivers/media/platform/davinci/vpif.c
+++ b/drivers/media/platform/davinci/vpif.c
@@ -37,8 +37,6 @@ MODULE_LICENSE("GPL");
 #define VPIF_CH2_MAX_MODES     (15)
 #define VPIF_CH3_MAX_MODES     (02)
 
-static resource_size_t res_len;
-static struct resource *res;
 spinlock_t vpif_lock;
 
 void __iomem *vpif_base;
@@ -421,23 +419,12 @@ EXPORT_SYMBOL(vpif_channel_getfid);
 
 static int vpif_probe(struct platform_device *pdev)
 {
-       int status = 0;
+       static struct resource  *res;
 
        res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-       if (!res)
-               return -ENOENT;
-
-       res_len = resource_size(res);
-
-       res = request_mem_region(res->start, res_len, res->name);
-       if (!res)
-               return -EBUSY;
-
-       vpif_base = ioremap(res->start, res_len);
-       if (!vpif_base) {
-               status = -EBUSY;
-               goto fail;
-       }
+       vpif_base = devm_request_and_ioremap(&pdev->dev, res);
+       if (IS_ERR(vpif_base))
+               return PTR_ERR(vpif_base);
 
        pm_runtime_enable(&pdev->dev);
        pm_runtime_get(&pdev->dev);
@@ -445,17 +432,11 @@ static int vpif_probe(struct platform_device *pdev)
        spin_lock_init(&vpif_lock);
        dev_info(&pdev->dev, "vpif probe success\n");
        return 0;
-
-fail:
-       release_mem_region(res->start, res_len);
-       return status;
 }
 
 static int vpif_remove(struct platform_device *pdev)
 {
        pm_runtime_disable(&pdev->dev);
-       iounmap(vpif_base);
-       release_mem_region(res->start, res_len);
        return 0;
 }
 
-- 
1.7.0.4

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