From 4d5392cc4de3403d71b929f39f3bc659db029ad1 Mon Sep 17 00:00:00 2001 From: Julia Lawall Date: Mon, 22 Sep 2008 19:04:54 -0700 Subject: [PATCH] drivers/isdn/capi/kcapi.c: Adjust error handling code involving capi_ctr_put After calling capi_ctr_get, error handling code should call capi_ctr_put. The semantic match that finds this problem is as follows: (http://www.emn.fr/x-info/coccinelle/) // @r@ expression x,E; statement S; position p1,p2,p3; @@ ( if ((x = capi_ctr_get@p1(...)) == NULL || ...) S | x = capi_ctr_get@p1(...) ... when != x if (x == NULL || ...) S ) <... if@p3 (...) { ... when != capi_ctr_put(x) when != if (x) { ... capi_ctr_put(x); ...} return@p2 ...; } ...> ( return x; | return 0; | x = E | E = x | capi_ctr_put(x) ) @exists@ position r.p1,r.p2,r.p3; expression x; int ret != 0; statement S; @@ * x = capi_ctr_get@p1(...) <... * if@p3 (...) S ...> * return@p2 \(NULL\|ret\); // Signed-off-by: Julia Lawall Signed-off-by: Andrew Morton Signed-off-by: David S. Miller --- drivers/isdn/capi/kcapi.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/isdn/capi/kcapi.c b/drivers/isdn/capi/kcapi.c index 75726ea0fbb..5360c4fd473 100644 --- a/drivers/isdn/capi/kcapi.c +++ b/drivers/isdn/capi/kcapi.c @@ -828,15 +828,18 @@ static int old_capi_manufacturer(unsigned int cmd, void __user *data) return -ESRCH; if (card->load_firmware == NULL) { printk(KERN_DEBUG "kcapi: load: no load function\n"); + capi_ctr_put(card); return -ESRCH; } if (ldef.t4file.len <= 0) { printk(KERN_DEBUG "kcapi: load: invalid parameter: length of t4file is %d ?\n", ldef.t4file.len); + capi_ctr_put(card); return -EINVAL; } if (ldef.t4file.data == NULL) { printk(KERN_DEBUG "kcapi: load: invalid parameter: dataptr is 0\n"); + capi_ctr_put(card); return -EINVAL; } @@ -849,6 +852,7 @@ static int old_capi_manufacturer(unsigned int cmd, void __user *data) if (card->cardstate != CARD_DETECTED) { printk(KERN_INFO "kcapi: load: contr=%d not in detect state\n", ldef.contr); + capi_ctr_put(card); return -EBUSY; } card->cardstate = CARD_LOADING; -- 2.41.1