[media] davinci: vpfe: fix return value check in vpfe_enable_clock()

In case of error, the function clk_get() returns ERR_PTR()
and never returns NULL. The NULL test in the return value
check should be replaced with IS_ERR().

Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Acked-by: Lad, Prabhakar <prabhakar.csengg@gmail.com>
Reviewed-by: Sakari Ailus <sakari.ailus@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

diff --git a/drivers/staging/media/davinci_vpfe/vpfe_mc_capture.c b/drivers/staging/media/davinci_vpfe/vpfe_mc_capture.c
index c7ae7d7..b88e1dd 100644 (file)
--- a/drivers/staging/media/davinci_vpfe/vpfe_mc_capture.c
+++ b/drivers/staging/media/davinci_vpfe/vpfe_mc_capture.c
@@ -243,7 +243,7 @@ static int vpfe_enable_clock(struct vpfe_device *vpfe_dev)
 
                vpfe_dev->clks[i] =
                                clk_get(vpfe_dev->pdev, vpfe_cfg->clocks[i]);
-               if (vpfe_dev->clks[i] == NULL) {
+               if (IS_ERR(vpfe_dev->clks[i])) {
                        v4l2_err(vpfe_dev->pdev->driver,
                                "Failed to get clock %s\n",
                                vpfe_cfg->clocks[i]);
@@ -264,7 +264,7 @@ static int vpfe_enable_clock(struct vpfe_device *vpfe_dev)
        return 0;
 out:
        for (i = 0; i < vpfe_cfg->num_clocks; i++)
-               if (vpfe_dev->clks[i]) {
+               if (!IS_ERR(vpfe_dev->clks[i])) {
                        clk_disable_unprepare(vpfe_dev->clks[i]);
                        clk_put(vpfe_dev->clks[i]);
                }