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| author | Matthew Garrett <mjg59@srcf.ucam.org> | 2009-04-13 14:39:44 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-04-13 15:04:29 -0700 |
| commit | 133bb070e94ab41d750c6f2160c8843e46f11b78 (patch) | |
| tree | 843aaa121f13ed754c8f14bd7011591035ac1550 | |
| parent | 0ca1071f7dbd673de826eb3fb01bfdfd1d423433 (diff) | |
| download | lwn-133bb070e94ab41d750c6f2160c8843e46f11b78.tar.gz lwn-133bb070e94ab41d750c6f2160c8843e46f11b78.zip | |
efifb: exit if framebuffer address is invalid
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>
Cc: Krzysztof Helt <krzysztof.h1@poczta.fm>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | 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 0c5b9a9fd56f..8dea2bc92705 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) { |