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fbdev: sh_mobile_meram: Validate ICB configuration outside mutex 

Validate as much of the requested ICB configuration as possible outside
of the mutex-protected region when registering ICBs.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
This commit is contained in:
Laurent Pinchart 2011-07-13 12:13:47 +02:00
parent f0a260fef6
commit 7963e21e50
1 changed files with 8 additions and 10 deletions
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18
drivers/video/sh_mobile_meram.c
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@ -410,24 +410,22 @@ static int sh_mobile_meram_register(struct sh_mobile_meram_info *pdata,
xres, yres, (!pixelformat) ? "yuv" : "rgb",
base_addr_y, base_addr_c);
mutex_lock(&priv->lock);
/* we can't handle wider than 8192px */
if (xres > 8192) {
dev_err(&pdev->dev, "width exceeding the limit (> 8192).");
error = -EINVAL;
goto err;
}
if (priv->used_meram_cache_regions + 2 > SH_MOBILE_MERAM_ICB_NUM) {
dev_err(&pdev->dev, "no more ICB available.");
error = -EINVAL;
goto err;
return -EINVAL;
}
/* do we have at least one ICB config? */
if (cfg->icb[0].marker_icb < 0 || cfg->icb[0].cache_icb < 0) {
dev_err(&pdev->dev, "at least one ICB is required.");
return -EINVAL;
}
mutex_lock(&priv->lock);
if (priv->used_meram_cache_regions + 2 > SH_MOBILE_MERAM_ICB_NUM) {
dev_err(&pdev->dev, "no more ICB available.");
error = -EINVAL;
goto err;
}