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| author | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-10-15 12:46:16 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-10-15 12:46:16 -0700 |
| commit | c596cc46ba1c5769866efe586daff3422bc31afe (patch) | |
| tree | 080f0fc2fc91d6b37f1cf2992bab3d6720c748e1 | |
| parent | f4921aff5b174349bc36551f142a5dbac782ea3f (diff) | |
| download | linux-exynos-c596cc46ba1c5769866efe586daff3422bc31afe.tar.gz linux-exynos-c596cc46ba1c5769866efe586daff3422bc31afe.tar.bz2 linux-exynos-c596cc46ba1c5769866efe586daff3422bc31afe.zip | |
scsi/gdth: fix crash in gdth_timeout if no gdth controllers found
If the gdth module is loaded (or compiled in), the gdth_timeout function
gets started even if no actual gdth controllers are found b the probing.
That ends up not only being unnecessary, but also causes a crash due to
the function blindly just trying to pick the first entry off the
"gdth_instances" list, and accessing it - which obviously doesn't work
if the list is empty!
Noticed by Ingo Molnar.
Tested-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | drivers/scsi/gdth.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/scsi/gdth.c b/drivers/scsi/gdth.c index e8010a702e73..3ac080ee6e2f 100644 --- a/drivers/scsi/gdth.c +++ b/drivers/scsi/gdth.c @@ -5213,6 +5213,10 @@ static int __init gdth_init(void) #endif /* CONFIG_PCI */ TRACE2(("gdth_detect() %d controller detected\n", gdth_ctr_count)); + + if (list_empty(&gdth_instances)) + return -ENODEV; + #ifdef GDTH_STATISTICS TRACE2(("gdth_detect(): Initializing timer !\n")); init_timer(&gdth_timer); |