diff options
| author |   Arvind Yadav <arvind.yadav.cs@gmail.com> | 2017-05-15 13:52:03 +0530 |
|---|---|---|
| committer |   Herbert Xu <herbert@gondor.apana.org.au> | 2017-05-23 12:52:03 +0800 |
| commit | 986130bf3701e9875a820e06ed5c6ae0a851900b (patch) | |
| tree | f1e6bdf287fd3893152f7cb15d7c8fa4708e887d /drivers/char/hw_random/omap3-rom-rng.c | |
| parent | crypto: aesni - add generic gcm(aes) (diff) | |
| download | linux-dev-986130bf3701e9875a820e06ed5c6ae0a851900b.tar.xz linux-dev-986130bf3701e9875a820e06ed5c6ae0a851900b.zip | |
hwrng: omap3-rom - Handle return value of clk_prepare_enable
Here, Clock enable can failed. So adding an error check for
clk_prepare_enable.
Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers/char/hw_random/omap3-rom-rng.c')
| -rw-r--r-- | drivers/char/hw_random/omap3-rom-rng.c | 11 |
1 files 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 37a58d78aab3..38b719017186 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 struct hwrng omap3_rom_rng_ops = { 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); |