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Date: Mon, 24 Jan 2022 19:39:51 +0100 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-kernel@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, stable@...r.kernel.org, Adam Ward <Adam.Ward.opensource@...semi.com>, Mark Brown <broonie@...nel.org>, Sasha Levin <sashal@...nel.org> Subject: [PATCH 5.16 0602/1039] regulator: da9121: Prevent current limit change when enabled From: Adam Ward <Adam.Ward.opensource@...semi.com> [ Upstream commit 24f0853228f3b98f1ef08d5824376c69bb8124d2 ] Prevent changing current limit when enabled as a precaution against possibile instability due to tight integration with switching cycle Signed-off-by: Adam Ward <Adam.Ward.opensource@...semi.com> Link: https://lore.kernel.org/r/52ee682476004a1736c1e0293358987319c1c415.1638223185.git.Adam.Ward.opensource@diasemi.com Signed-off-by: Mark Brown <broonie@...nel.org> Signed-off-by: Sasha Levin <sashal@...nel.org> --- drivers/regulator/da9121-regulator.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/regulator/da9121-regulator.c b/drivers/regulator/da9121-regulator.c index e669250902580..0a4fd449c27d1 100644 --- a/drivers/regulator/da9121-regulator.c +++ b/drivers/regulator/da9121-regulator.c @@ -253,6 +253,11 @@ static int da9121_set_current_limit(struct regulator_dev *rdev, goto error; } + if (rdev->desc->ops->is_enabled(rdev)) { + ret = -EBUSY; + goto error; + } + ret = da9121_ceiling_selector(rdev, min_ua, max_ua, &sel); if (ret < 0) goto error; -- 2.34.1
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