Patch "regulator: core: Fix resolve supply lookup issue" has been added to the 6.1-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

This is a note to let you know that I've just added the patch titled

    regulator: core: Fix resolve supply lookup issue

to the 6.1-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     regulator-core-fix-resolve-supply-lookup-issue.patch
and it can be found in the queue-6.1 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 5cb3dc8e35cb7155f8afe80551f717cab176410f
Author: ChiYuan Huang <cy_huang@xxxxxxxxxxx>
Date:   Wed Dec 14 09:37:11 2022 +0800

    regulator: core: Fix resolve supply lookup issue
    
    [ Upstream commit 0debed5b117d11e33cba52870c4dcb64f5911891 ]
    
    From Marek's log, the previous change modify the parent of rdev.
    https://lore.kernel.org/all/58b92e75-f373-dae7-7031-8abd465bb874@xxxxxxxxxxx/
    
    In 'regulator_resolve_supply', it uses the parent DT node of rdev as the
    DT-lookup starting node. But the parent DT node may not exist. This will
    cause the NULL supply issue.
    
    This patch modify the parent of rdev back to the device that provides
    from 'regulator_config' in 'regulator_register'.
    
    Fixes: 8f3cbcd6b440 ("regulator: core: Use different devices for resource allocation and DT lookup")
    Reported-by: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx>
    Tested-by: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx>
    Signed-off-by: ChiYuan Huang <cy_huang@xxxxxxxxxxx>
    Link: https://lore.kernel.org/r/1670981831-12583-1-git-send-email-u0084500@xxxxxxxxx
    Signed-off-by: Mark Brown <broonie@xxxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index 8b567664f812..8e83a20a7e2e 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -5534,7 +5534,7 @@ regulator_register(struct device *dev,
 
 	/* register with sysfs */
 	rdev->dev.class = &regulator_class;
-	rdev->dev.parent = dev;
+	rdev->dev.parent = config->dev;
 	dev_set_name(&rdev->dev, "regulator.%lu",
 		    (unsigned long) atomic_inc_return(&regulator_no));
 	dev_set_drvdata(&rdev->dev, rdev);