Here, Clock enable can failed. So adding an error check for
clk_prepare_enable.
Signed-off-by: Arvind Yadav <arvind.yadav.cs@xxxxxxxxx>
---
drivers/char/hw_random/omap3-rom-rng.c | 11 +++++++++--
1 file changed, 9 insertions(+), 2 deletions(-)
diff --git a/drivers/char/hw_random/omap3-rom-rng.c b/drivers/char/hw_random/omap3-rom-rng.c
index 37a58d7..38b7190 100644
--- a/drivers/char/hw_random/omap3-rom-rng.c
+++ b/drivers/char/hw_random/omap3-rom-rng.c
@@ -53,7 +53,10 @@ static int omap3_rom_rng_get_random(void *buf, unsigned int count)
cancel_delayed_work_sync(&idle_work);
if (rng_idle) {
- clk_prepare_enable(rng_clk);
+ r = clk_prepare_enable(rng_clk);
+ if (r)
+ return r;
+
r = omap3_rom_rng_call(0, 0, RNG_GEN_PRNG_HW_INIT);
if (r != 0) {
clk_disable_unprepare(rng_clk);
@@ -88,6 +91,8 @@ static int omap3_rom_rng_read(struct hwrng *rng, void *data, size_t max, bool w)
static int omap3_rom_rng_probe(struct platform_device *pdev)
{
+ int ret = 0;
+
pr_info("initializing\n");
omap3_rom_rng_call = pdev->dev.platform_data;
@@ -104,7 +109,9 @@ static int omap3_rom_rng_probe(struct platform_device *pdev)
}
/* Leave the RNG in reset state. */
- clk_prepare_enable(rng_clk);
+ ret = clk_prepare_enable(rng_clk);
+ if (ret)
+ return ret;
omap3_rom_rng_idle(0);
return hwrng_register(&omap3_rom_rng_ops);
--
1.9.1
