regulator: Fix suspend to idle

"Linux Kernel Mailing List" <[email protected]>
Newsgroups gmane.linux.kernel.commits.head
Message-ID <[email protected]>
Web:        https://git.kernel.org/torvalds/c/57a0dd187956ea04870f4bbbf25a63c425ee7cad
Commit:     57a0dd187956ea04870f4bbbf25a63c425ee7cad
Parent:     4e79f3f1c832fc9eabf5435d73ba0279e58f9b9d
Refname:    refs/heads/master
Author:     Mark Brown <[email protected]>
AuthorDate: Tue Jan 30 12:16:31 2018 +0000
Committer:  Mark Brown <[email protected]>
CommitDate: Tue Jan 30 12:25:59 2018 +0000

    regulator: Fix suspend to idle
    
    When suspending to idle with the new suspend mode configuration support
    we go through the suspend callbacks with a state of PM_SUSPEND_TO_IDLE
    which we don't have regulator constraints for, causing an error.  Avoid
    this and similar errors by treating missing constraints as a noop.
    
    Reported-by: Geert Uytterhoeven <[email protected]>
    Tested-by: Geert Uytterhoeven <[email protected]>
    Signed-off-by: Mark Brown <[email protected]>
---
 drivers/regulator/core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index 42681c10cbe4..dd4708c58480 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -758,7 +758,7 @@ static int suspend_set_state(struct regulator_dev *rdev,
 
 	rstate = regulator_get_suspend_state(rdev, state);
 	if (rstate == NULL)
-		return -EINVAL;
+		return 0;
 
 	/* If we have no suspend mode configration don't set anything;
 	 * only warn if the driver implements set_suspend_voltage or
--
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