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Message-Id: <1353671833-14516-1-git-send-email-tushar.behera@linaro.org>
Date: Fri, 23 Nov 2012 17:27:13 +0530
From: Tushar Behera <tushar.behera@...aro.org>
To: linux-kernel@...r.kernel.org, linux-fbdev@...r.kernel.org
Cc: FlorianSchandinat@....de, linux@...sktech.co.nz, patches@...aro.org
Subject: [PATCH] video: vt8505: Use devm_* APIs
Use devm_request_and_ioremap(), dmam_alloc_coherent() APIs to cleanup
driver probe and remove functions. This also fixes a possible memory
leak as the memory allocated by dma_alloc_coherent() was not getting
freed up.
Signed-off-by: Tushar Behera <tushar.behera@...aro.org>
---
This patch has only been build tested.
drivers/video/wm8505fb.c | 46 +++++++++-------------------------------------
1 files changed, 9 insertions(+), 37 deletions(-)
diff --git a/drivers/video/wm8505fb.c b/drivers/video/wm8505fb.c
index 77539c1..95539af 100644
--- a/drivers/video/wm8505fb.c
+++ b/drivers/video/wm8505fb.c
@@ -281,8 +281,7 @@ static int __devinit wm8505fb_probe(struct platform_device *pdev)
sizeof(u32) * 16, GFP_KERNEL);
if (!fbi) {
dev_err(&pdev->dev, "Failed to initialize framebuffer device\n");
- ret = -ENOMEM;
- goto failed;
+ return -ENOMEM;
}
strcpy(fbi->fb.fix.id, DRIVER_NAME);
@@ -310,29 +309,19 @@ static int __devinit wm8505fb_probe(struct platform_device *pdev)
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (res == NULL) {
dev_err(&pdev->dev, "no I/O memory resource defined\n");
- ret = -ENODEV;
- goto failed_fbi;
+ return -ENODEV;
}
- res = request_mem_region(res->start, resource_size(res), DRIVER_NAME);
- if (res == NULL) {
- dev_err(&pdev->dev, "failed to request I/O memory\n");
- ret = -EBUSY;
- goto failed_fbi;
- }
-
- fbi->regbase = ioremap(res->start, resource_size(res));
+ fbi->regbase = devm_request_and_ioremap(&pdev->dev, res);
if (fbi->regbase == NULL) {
- dev_err(&pdev->dev, "failed to map I/O memory\n");
- ret = -EBUSY;
- goto failed_free_res;
+ dev_err(&pdev->dev, "failed to request and map I/O memory\n");
+ return -EBUSY;
}
np = of_parse_phandle(pdev->dev.of_node, "default-mode", 0);
if (!np) {
pr_err("%s: No display description in Device Tree\n", __func__);
- ret = -EINVAL;
- goto failed_free_res;
+ return -EINVAL;
}
/*
@@ -351,7 +340,7 @@ static int __devinit wm8505fb_probe(struct platform_device *pdev)
ret |= of_property_read_u32(np, "bpp", &bpp);
if (ret) {
pr_err("%s: Unable to read display properties\n", __func__);
- goto failed_free_res;
+ return ret;
}
of_mode.vmode = FB_VMODE_NONINTERLACED;
@@ -365,7 +354,7 @@ static int __devinit wm8505fb_probe(struct platform_device *pdev)
/* try allocating the framebuffer */
fb_mem_len = of_mode.xres * of_mode.yres * 2 * (bpp / 8);
- fb_mem_virt = dma_alloc_coherent(&pdev->dev, fb_mem_len, &fb_mem_phys,
+ fb_mem_virt = dmam_alloc_coherent(&pdev->dev, fb_mem_len, &fb_mem_phys,
GFP_KERNEL);
if (!fb_mem_virt) {
pr_err("%s: Failed to allocate framebuffer\n", __func__);
@@ -383,8 +372,7 @@ static int __devinit wm8505fb_probe(struct platform_device *pdev)
if (fb_alloc_cmap(&fbi->fb.cmap, 256, 0) < 0) {
dev_err(&pdev->dev, "Failed to allocate color map\n");
- ret = -ENOMEM;
- goto failed_free_io;
+ return -ENOMEM;
}
wm8505fb_init_hw(&fbi->fb);
@@ -420,21 +408,12 @@ static int __devinit wm8505fb_probe(struct platform_device *pdev)
failed_free_cmap:
if (fbi->fb.cmap.len)
fb_dealloc_cmap(&fbi->fb.cmap);
-failed_free_io:
- iounmap(fbi->regbase);
-failed_free_res:
- release_mem_region(res->start, resource_size(res));
-failed_fbi:
- platform_set_drvdata(pdev, NULL);
- kfree(fbi);
-failed:
return ret;
}
static int __devexit wm8505fb_remove(struct platform_device *pdev)
{
struct wm8505fb_info *fbi = platform_get_drvdata(pdev);
- struct resource *res;
device_remove_file(&pdev->dev, &dev_attr_contrast);
@@ -445,13 +424,6 @@ static int __devexit wm8505fb_remove(struct platform_device *pdev)
if (fbi->fb.cmap.len)
fb_dealloc_cmap(&fbi->fb.cmap);
- iounmap(fbi->regbase);
-
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- release_mem_region(res->start, resource_size(res));
-
- kfree(fbi);
-
return 0;
}
--
1.7.4.1
--
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