clk: at91: generated: Truncate divisor to GENERATED_MAX_DIV + 1
authorCodrin Ciubotariu <codrin.ciubotariu@microchip.com>
Tue, 25 Jun 2019 09:10:02 +0000 (12:10 +0300)
committerStephen Boyd <sboyd@kernel.org>
Mon, 22 Jul 2019 21:32:08 +0000 (14:32 -0700)
commit1573eebeaa8055777eb753f9b4d1cbe653380c38
tree6caafce6cc4df9eb416751a10caac89ef88d2b97
parent5f9e832c137075045d15cd6899ab0505cfb2ca4b
clk: at91: generated: Truncate divisor to GENERATED_MAX_DIV + 1

In clk_generated_determine_rate(), if the divisor is greater than
GENERATED_MAX_DIV + 1, then the wrong best_rate will be returned.
If clk_generated_set_rate() will be called later with this wrong
rate, it will return -EINVAL, so the generated clock won't change
its value. Do no let the divisor be greater than GENERATED_MAX_DIV + 1.

Fixes: 8c7aa6328947 ("clk: at91: clk-generated: remove useless divisor loop")
Signed-off-by: Codrin Ciubotariu <codrin.ciubotariu@microchip.com>
Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Acked-by: Ludovic Desroches <ludovic.desroches@microchip.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
drivers/clk/at91/clk-generated.c