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clocksource/drivers/timer-of: Check return value of of_iomap in timer_of_base_init()

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[ Upstream commit 4467b8bad2 ]

of_base->base can either be iomapped using of_io_request_and_map() or
of_iomap() depending whether or not an of_base->name has been set.

Thus check of_base->base against NULL as of_iomap() does not return a
PTR_ERR() in case of error.

Fixes: 9aea417afa ("clocksource/drivers/timer-of: Don't request the resource by name")
Signed-off-by: Guillaume Ranquet <granquet@baylibre.com>
Link: https://lore.kernel.org/r/20220307172656.4836-1-granquet@baylibre.com
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Guillaume Ranquet 2022-03-07 18:26:56 +01:00 committed by Greg Kroah-Hartman
parent b305975a66
commit 8dc887ae33
1 changed files with 3 additions and 3 deletions
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6
drivers/clocksource/timer-of.c
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@ -157,9 +157,9 @@ static __init int timer_of_base_init(struct device_node *np,
of_base->base = of_base->name ?
of_io_request_and_map(np, of_base->index, of_base->name) :
of_iomap(np, of_base->index);
if (IS_ERR(of_base->base)) {
pr_err("Failed to iomap (%s)\n", of_base->name);
return PTR_ERR(of_base->base);
if (IS_ERR_OR_NULL(of_base->base)) {
pr_err("Failed to iomap (%s:%s)\n", np->name, of_base->name);
return of_base->base ? PTR_ERR(of_base->base) : -ENOMEM;
}
return 0;