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>

diff --git a/drivers/mfd/db8500-prcmu.c b/drivers/mfd/db8500-prcmu.c
index 193cf16..89ae8bf 100644 (file)
--- 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);