pwm: Return -ENODEV if no PWM lookup match is found
When looking up a PWM using the lookup table, assume that all entries
will have been added already, so failure to find a match means that no
corresponding entry has been registered.
This fixes an issue where -EPROBE_DEFER would be returned if the PWM
lookup table is empty. After this fix, -EPROBE_DEFER is reserved for
situations where no provider has yet registered for a matching entry.
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
diff --git a/drivers/pwm/core.c b/drivers/pwm/core.c
index b8f6c30..d24ca5f 100644
--- a/drivers/pwm/core.c
+++ b/drivers/pwm/core.c
@@ -738,8 +738,10 @@
}
}
- if (!chosen)
+ if (!chosen) {
+ pwm = ERR_PTR(-ENODEV);
goto out;
+ }
chip = pwmchip_find_by_name(chosen->provider);
if (!chip)