Commit c596cc46 authored Oct 15, 2007 by Linus Torvalds

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>

parent f4921aff

drivers/scsi/gdth.c

+4 −0

Original line number	Diff line number	Diff line
		@@ -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);