acornfb: Dont BUG() on invalid pan parameters
The driver currently BUG()s if the pan parameters passed directly from userspace are invalid. Return -EINVAL instead. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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@ -852,7 +852,8 @@ acornfb_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
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if (!(var->vmode & FB_VMODE_YWRAP))
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y_bottom += var->yres;
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BUG_ON(y_bottom > var->yres_virtual);
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if (y_bottom > var->yres_virtual)
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return -EINVAL;
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acornfb_update_dma(info, var);
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