mfd: db8500-prcmu: Check return of devm_ioremap for error

Error check around return value of devm_ioremap is missing. Add the same
to avoid NULL pointer dereference.

Signed-off-by: Pramod Gurav <pramod.gurav@smartplayin.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>

1 files changed, 5 insertions, 0 deletions

diff --git a/drivers/mfd/db8500-prcmu.c b/drivers/mfd/db8500-prcmu.c
index 193cf168ba84..89ae8bf665b4 100644
--- a/drivers/mfd/db8500-prcmu.c
+++ b/drivers/mfd/db8500-prcmu.c
@@ -3167,6 +3167,11 @@ static int db8500_prcmu_probe(struct platform_device *pdev)
         }
         tcdm_base = devm_ioremap(&pdev->dev, res->start,
                         resource_size(res));
+        if (!tcdm_base) {
+                dev_err(&pdev->dev,
+                        "failed to ioremap prcmu-tcdm register memory\n");
+                return -ENOENT;
+        }
 
         /* Clean up the mailbox interrupts after pre-kernel code. */
         writel(ALL_MBOX_BITS, PRCM_ARM_IT1_CLR);