From 60daac4a9084d5a6216443f428d0060c42eb44ff Mon Sep 17 00:00:00 2001 From: Julia Lawall Date: Mon, 26 Dec 2011 18:38:00 +0100 Subject: [PATCH] drivers/watchdog/lantiq_wdt.c: drop iounmap for devm_ allocated data Data allocated with devm_ioremap or devm_ioremap_nocache should not be freed using iounmap, because doing so causes a dangling pointer, and a subsequent double free. The semantic match that finds this problem is as follows: (http://coccinelle.lip6.fr/) // @r@ expression x; @@ ( x = devm_ioremap(...) | x = devm_ioremap_nocache(...) ) @@ expression r.x; @@ * iounmap(x) // Signed-off-by: Julia Lawall Signed-off-by: Wim Van Sebroeck --- drivers/watchdog/lantiq_wdt.c | 3 --- 1 file changed, 3 deletions(-) diff --git a/drivers/watchdog/lantiq_wdt.c b/drivers/watchdog/lantiq_wdt.c index 102aed0efbf1..d3a63be2e28d 100644 --- a/drivers/watchdog/lantiq_wdt.c +++ b/drivers/watchdog/lantiq_wdt.c @@ -222,9 +222,6 @@ ltq_wdt_remove(struct platform_device *pdev) { misc_deregister(<q_wdt_miscdev); - if (ltq_wdt_membase) - iounmap(ltq_wdt_membase); - return 0; } -- 2.39.2