linux-kernel - [PATCH AUTOSEL 5.15 01/15] regulator: irq

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Message-ID: <20240507231333.394765-1-sashal@kernel.org>
Date: Tue,  7 May 2024 19:13:10 -0400
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Cc: Matti Vaittinen <mazziesaccount@...il.com>,
	Mark Brown <broonie@...nel.org>,
	Sasha Levin <sashal@...nel.org>,
	lgirdwood@...il.com
Subject: [PATCH AUTOSEL 5.15 01/15] regulator: irq_helpers: duplicate IRQ name

From: Matti Vaittinen <mazziesaccount@...il.com>

[ Upstream commit 7ab681ddedd4b6dd2b047c74af95221c5f827e1d ]

The regulator IRQ helper requires caller to provide pointer to IRQ name
which is kept in memory by caller. All other data passed to the helper
in the regulator_irq_desc structure is copied. This can cause some
confusion and unnecessary complexity.

Make the regulator_irq_helper() to copy also the provided IRQ name
information so caller can discard the name after the call to
regulator_irq_helper() completes.

Signed-off-by: Matti Vaittinen <mazziesaccount@...il.com>
Link: https://msgid.link/r/ZhJMuUYwaZbBXFGP@drtxq0yyyyyyyyyyyyydy-3.rev.dnainternet.fi
Signed-off-by: Mark Brown <broonie@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/regulator/irq_helpers.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/regulator/irq_helpers.c b/drivers/regulator/irq_helpers.c
index 5227644355750..a44a0b30a6516 100644
--- a/drivers/regulator/irq_helpers.c
+++ b/drivers/regulator/irq_helpers.c
@@ -350,6 +350,9 @@ void *regulator_irq_helper(struct device *dev,
 
 	h->irq = irq;
 	h->desc = *d;
+	h->desc.name = devm_kstrdup(dev, d->name, GFP_KERNEL);
+	if (!h->desc.name)
+		return ERR_PTR(-ENOMEM);
 
 	ret = init_rdev_state(dev, h, rdev, common_errs, per_rdev_errs,
 			      rdev_amount);
-- 
2.43.0