3.16.82-rc1 review patch. If anyone has any objections, please let me know.
------------------
From: Tony Lindgren <tony@xxxxxxxxxxx>
commit eaecce12f5f0d2c35d278e41e1bc4522393861ab upstream.
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@xxxxxx>
Cc: Adam Ford <aford173@xxxxxxxxx>
Cc: Pali Rohár <pali.rohar@xxxxxxxxx>
Cc: Sebastian Reichel <sre@xxxxxxxxxx>
Cc: Tero Kristo <t-kristo@xxxxxx>
Fixes: 1c6b7c2108bd ("hwrng: OMAP3 ROM Random Number Generator support")
Signed-off-by: Tony Lindgren <tony@xxxxxxxxxxx>
Signed-off-by: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Ben Hutchings <ben@xxxxxxxxxxxxxxx>
---
drivers/char/hw_random/omap3-rom-rng.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/drivers/char/hw_random/omap3-rom-rng.c
+++ b/drivers/char/hw_random/omap3-rom-rng.c
@@ -119,7 +119,8 @@ static int omap3_rom_rng_probe(struct pl
static int omap3_rom_rng_remove(struct platform_device *pdev)
{
hwrng_unregister(&omap3_rom_rng_ops);
- clk_disable_unprepare(rng_clk);
+ if (!rng_idle)
+ clk_disable_unprepare(rng_clk);
return 0;
}
