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SubjectRe: [PATCH] drivers/video/ep93xx-fb.c: clean up error-handling code
On 04/18/2012 07:37 PM, Julia Lawall wrote:
> From: Julia Lawall <Julia.Lawall@lip6.fr>
>
> There were two problems in this code: failure of the setup function should
> free locally allocated resources like other nearby failures, and the test
> if (&info->cmap) can never be false. To generally clean things up, this
> patch reorders the error handling code at the failed label and adds labels
> so that the conditionals are not necessary.
>
> Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>

Applied.


Thanks,

Florian Tobias Schandinat

>
> ---
> Not tested.
>
> drivers/video/ep93xx-fb.c | 32 +++++++++++++++++---------------
> 1 file changed, 17 insertions(+), 15 deletions(-)
>
> diff --git a/drivers/video/ep93xx-fb.c b/drivers/video/ep93xx-fb.c
> index f8babbe..345d962 100644
> --- a/drivers/video/ep93xx-fb.c
> +++ b/drivers/video/ep93xx-fb.c
> @@ -507,16 +507,16 @@ static int __devinit ep93xxfb_probe(struct platform_device *pdev)
>
> err = fb_alloc_cmap(&info->cmap, 256, 0);
> if (err)
> - goto failed;
> + goto failed_cmap;
>
> err = ep93xxfb_alloc_videomem(info);
> if (err)
> - goto failed;
> + goto failed_videomem;
>
> res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> if (!res) {
> err = -ENXIO;
> - goto failed;
> + goto failed_resource;
> }
>
> /*
> @@ -532,7 +532,7 @@ static int __devinit ep93xxfb_probe(struct platform_device *pdev)
> fbi->mmio_base = ioremap(res->start, resource_size(res));
> if (!fbi->mmio_base) {
> err = -ENXIO;
> - goto failed;
> + goto failed_resource;
> }
>
> strcpy(info->fix.id, pdev->name);
> @@ -553,24 +553,24 @@ static int __devinit ep93xxfb_probe(struct platform_device *pdev)
> if (err == 0) {
> dev_err(info->dev, "No suitable video mode found\n");
> err = -EINVAL;
> - goto failed;
> + goto failed_mode;
> }
>
> if (mach_info->setup) {
> err = mach_info->setup(pdev);
> if (err)
> - return err;
> + goto failed_mode;
> }
>
> err = ep93xxfb_check_var(&info->var, info);
> if (err)
> - goto failed;
> + goto failed_check;
>
> fbi->clk = clk_get(info->dev, NULL);
> if (IS_ERR(fbi->clk)) {
> err = PTR_ERR(fbi->clk);
> fbi->clk = NULL;
> - goto failed;
> + goto failed_check;
> }
>
> ep93xxfb_set_par(info);
> @@ -585,15 +585,17 @@ static int __devinit ep93xxfb_probe(struct platform_device *pdev)
> return 0;
>
> failed:
> - if (fbi->clk)
> - clk_put(fbi->clk);
> - if (fbi->mmio_base)
> - iounmap(fbi->mmio_base);
> - ep93xxfb_dealloc_videomem(info);
> - if (&info->cmap)
> - fb_dealloc_cmap(&info->cmap);
> + clk_put(fbi->clk);
> +failed_check:
> if (fbi->mach_info->teardown)
> fbi->mach_info->teardown(pdev);
> +failed_mode:
> + iounmap(fbi->mmio_base);
> +failed_resource:
> + ep93xxfb_dealloc_videomem(info);
> +failed_videomem:
> + fb_dealloc_cmap(&info->cmap);
> +failed_cmap:
> kfree(info);
> platform_set_drvdata(pdev, NULL);
>
>
>



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