From a6e358b2f5b219fda18a7bc9348cb969043c19d5 Mon Sep 17 00:00:00 2001 From: Sascha Hauer Date: Wed, 27 Jun 2012 15:15:30 +0200 Subject: [PATCH] drivers/base: bail out if request_iomem_region fails When request_iomem_region fails we have to bail out instead of dereferencing res->start. Signed-off-by: Sascha Hauer --- drivers/base/driver.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/base/driver.c b/drivers/base/driver.c index 3be4b9903..81cedca1d 100644 --- a/drivers/base/driver.c +++ b/drivers/base/driver.c @@ -262,6 +262,8 @@ void __iomem *dev_request_mem_region(struct device_d *dev, int num) return NULL; res = request_iomem_region(dev_name(dev), res->start, res->size); + if (!res) + return NULL; return (void __force __iomem *)res->start; }