[PATCH] cciss: fix memory leak

[Jesper Juhl]

There's a memory leak in the cciss driver.

MAINLINE: f2912a1223c0917a7b4e054f18086209137891ea

in alloc_cciss_hba() we may leak sizeof(ctlr_info_t) bytes if a
call to alloc_disk(1 << NWD_SHIFT) fails.
This patch should fix the issue.

Spotted by the Coverity checker.

Signed-off-by: Jesper Juhl <jesper.juhl@xxxxxxxxx>
Acked-by: Mike Miller <mike.miller@xxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
CC: Oliver Pinter <oliver.pntr@xxxxxxxxx>

diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c
index 5acc6c4..132f76b 100644
--- a/drivers/block/cciss.c
+++ b/drivers/block/cciss.c
@@ -3225,12 +3225,15 @@ static int alloc_cciss_hba(void)
 	for (i = 0; i < MAX_CTLR; i++) {
 		if (!hba[i]) {
 			ctlr_info_t *p;
+
 			p = kzalloc(sizeof(ctlr_info_t), GFP_KERNEL);
 			if (!p)
 				goto Enomem;
 			p->gendisk[0] = alloc_disk(1 << NWD_SHIFT);
-			if (!p->gendisk[0])
+			if (!p->gendisk[0]) {
+				kfree(p);
 				goto Enomem;
+			}
 			hba[i] = p;
 			return i;
 		}