diff options
Diffstat (limited to 'drivers/video/fbmem.c')
| -rw-r--r-- | drivers/video/fbmem.c | 19 |
1 files changed, 15 insertions, 4 deletions
diff --git a/drivers/video/fbmem.c b/drivers/video/fbmem.c index 750c71f141f4..99bbd282ce63 100644 --- a/drivers/video/fbmem.c +++ b/drivers/video/fbmem.c @@ -871,8 +871,8 @@ fb_pan_display(struct fb_info *info, struct fb_var_screeninfo *var) err = -EINVAL; if (err || !info->fbops->fb_pan_display || - var->yoffset + yres > info->var.yres_virtual || - var->xoffset + info->var.xres > info->var.xres_virtual) + var->yoffset > info->var.yres_virtual - yres || + var->xoffset > info->var.xres_virtual - info->var.xres) return -EINVAL; if ((err = info->fbops->fb_pan_display(var, info))) @@ -954,6 +954,7 @@ fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var) goto done; if ((var->activate & FB_ACTIVATE_MASK) == FB_ACTIVATE_NOW) { + struct fb_var_screeninfo old_var; struct fb_videomode mode; if (info->fbops->fb_get_caps) { @@ -963,10 +964,20 @@ fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var) goto done; } + old_var = info->var; info->var = *var; - if (info->fbops->fb_set_par) - info->fbops->fb_set_par(info); + if (info->fbops->fb_set_par) { + ret = info->fbops->fb_set_par(info); + + if (ret) { + info->var = old_var; + printk(KERN_WARNING "detected " + "fb_set_par error, " + "error code: %d\n", ret); + goto done; + } + } fb_pan_display(info, &info->var); fb_set_cmap(&info->cmap, info); |