Messages in this thread Patch in this message | | | Date | Wed, 1 Apr 2009 19:57:58 +0100 | From | Matthew Garrett <> | Subject | [PATCH] efifb: Exit if framebuffer address is invalid |
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efifb will attempt to ioremap a framebuffer even if its starting address is 0, failing and causing an ugly backtrace in the process. Exit before probing if this is the case.
Signed-off-by: Matthew Garrett <mjg@redhat.com> Acked-by: Peter Jones <pjones@redhat.com> --- drivers/video/efifb.c | 7 +++++-- 1 files changed, 5 insertions(+), 2 deletions(-)
diff --git a/drivers/video/efifb.c b/drivers/video/efifb.c index 0c5b9a9..8dea2bc 100644 --- a/drivers/video/efifb.c +++ b/drivers/video/efifb.c @@ -210,12 +210,15 @@ static int __init efifb_probe(struct platform_device *dev) unsigned int size_total; int request_succeeded = 0; - printk(KERN_INFO "efifb: probing for efifb\n"); - if (!screen_info.lfb_depth) screen_info.lfb_depth = 32; if (!screen_info.pages) screen_info.pages = 1; + if (!screen_info.lfb_base) { + printk(KERN_DEBUG "efifb: invalid framebuffer address\n"); + return -ENODEV; + } + printk(KERN_INFO "efifb: probing for efifb\n"); /* just assume they're all unset if any are */ if (!screen_info.blue_size) { -- Matthew Garrett | mjg59@srcf.ucam.org
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