aboutsummaryrefslogtreecommitdiffstats
path: root/block/elevator.c
diff options
context:
space:
mode:
authorZachary Amsden <zach@vmware.com>2005-11-09 13:23:01 +0100
committerJens Axboe <axboe@nelson.home.kernel.dk>2005-11-12 10:54:48 +0100
commitb8ea2cb5120a92fe63053a2896be42abbb919a76 (patch)
treeedbe103c6c5c2fe971ee270d8b0e3ae7dab8af83 /block/elevator.c
parentcd52d1ee9a92587b242d946a2300a3245d3b885a (diff)
downloadmrst-s0i3-test-b8ea2cb5120a92fe63053a2896be42abbb919a76.tar.gz
mrst-s0i3-test-b8ea2cb5120a92fe63053a2896be42abbb919a76.tar.xz
mrst-s0i3-test-b8ea2cb5120a92fe63053a2896be42abbb919a76.zip
[BLOCK] elevator init fixes
I got a panic in the elevator code, backtrace : Unable to handle kernel NULL pointer dereference at virtual address 00000060 .. EIP is at elevator_put+0x0/0x30 (null elevator_type passed) .. elevator_init+0x38 blk_init_queu_node+0xc9 floppy_init+0xdb do_initcalls+0x23 init+0x10a init+0x0 Clearly if the kmalloc here fails, e->elevator_type is not yet set; this appears to be the correct fix, but I think I probably hit the second case due to a race condition. Someone more familiar with the elevator code should look at this more closely until I can determine if I can reproduce. Signed-off-by: Zachary Amsden <zach@vmware.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Jens Axboe <axboe@suse.de>
Diffstat (limited to 'block/elevator.c')
-rw-r--r--block/elevator.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/block/elevator.c b/block/elevator.c
index d4a49a3df82..23cfbe528be 100644
--- a/block/elevator.c
+++ b/block/elevator.c
@@ -190,14 +190,14 @@ int elevator_init(request_queue_t *q, char *name)
eq = kmalloc(sizeof(struct elevator_queue), GFP_KERNEL);
if (!eq) {
- elevator_put(e->elevator_type);
+ elevator_put(e);
return -ENOMEM;
}
ret = elevator_attach(q, e, eq);
if (ret) {
kfree(eq);
- elevator_put(e->elevator_type);
+ elevator_put(e);
}
return ret;