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| author | Tony Lindgren <tony@atomide.com> | 2019-09-15 00:02:56 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-12-31 18:34:55 +0300 |
| commit | 03e5b2405e2518265850da1c76b827389ca6da05 (patch) | |
| tree | 1cedd03bf78107b63db1a7442c24d0b1205fd5f9 /drivers/char/hw_random | |
| parent | 8b8d3dc5a8c2c4694fff9ce97e380c82ed168b15 (diff) | |
| download | linux-03e5b2405e2518265850da1c76b827389ca6da05.tar.xz | |
hwrng: omap3-rom - Call clk_disable_unprepare() on exit only if not idled
[ Upstream commit eaecce12f5f0d2c35d278e41e1bc4522393861ab ]
When unloading omap3-rom-rng, we'll get the following:
WARNING: CPU: 0 PID: 100 at drivers/clk/clk.c:948 clk_core_disable
This is because the clock may be already disabled by omap3_rom_rng_idle().
Let's fix the issue by checking for rng_idle on exit.
Cc: Aaro Koskinen <aaro.koskinen@iki.fi>
Cc: Adam Ford <aford173@gmail.com>
Cc: Pali Rohár <pali.rohar@gmail.com>
Cc: Sebastian Reichel <sre@kernel.org>
Cc: Tero Kristo <t-kristo@ti.com>
Fixes: 1c6b7c2108bd ("hwrng: OMAP3 ROM Random Number Generator support")
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/char/hw_random')
| -rw-r--r-- | drivers/char/hw_random/omap3-rom-rng.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/char/hw_random/omap3-rom-rng.c b/drivers/char/hw_random/omap3-rom-rng.c index 38b719017186..648e39ce6bd9 100644 --- a/drivers/char/hw_random/omap3-rom-rng.c +++ b/drivers/char/hw_random/omap3-rom-rng.c @@ -121,7 +121,8 @@ static int omap3_rom_rng_remove(struct platform_device *pdev) { cancel_delayed_work_sync(&idle_work); hwrng_unregister(&omap3_rom_rng_ops); - clk_disable_unprepare(rng_clk); + if (!rng_idle) + clk_disable_unprepare(rng_clk); return 0; } |