linux-kernel - [PATCH] iio: dac: adi-axi-dac: add io

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Message-Id: <20250219-wip-bl-axi-dac-add-enum-check-v1-1-8de9db0b3b1b@baylibre.com>
Date: Wed, 19 Feb 2025 19:57:43 +0100
From: Angelo Dureghello <adureghello@...libre.com>
To: Nuno Sa <nuno.sa@...log.com>, Lars-Peter Clausen <lars@...afoo.de>, 
 Michael Hennerich <Michael.Hennerich@...log.com>, 
 Jonathan Cameron <jic23@...nel.org>
Cc: linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org, 
 Angelo Dureghello <adureghello@...libre.com>
Subject: [PATCH] iio: dac: adi-axi-dac: add io_mode check

From: Angelo Dureghello <adureghello@...libre.com>

Add safe check to the high bound of the enum values,

Signed-off-by: Angelo Dureghello <adureghello@...libre.com>
---
 drivers/iio/dac/adi-axi-dac.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/iio/dac/adi-axi-dac.c b/drivers/iio/dac/adi-axi-dac.c
index 009fb987e1afd04c3dbc59a9742f7982744420c2..892d770aec69c4259de777058801c9ab33c79923 100644
--- a/drivers/iio/dac/adi-axi-dac.c
+++ b/drivers/iio/dac/adi-axi-dac.c
@@ -728,6 +728,9 @@ static int axi_dac_bus_set_io_mode(struct iio_backend *back,
 	struct axi_dac_state *st = iio_backend_get_priv(back);
 	int ival, ret;
 
+	if (mode > AD3552R_IO_MODE_QSPI)
+		return -EINVAL;
+
 	guard(mutex)(&st->lock);
 
 	ret = regmap_update_bits(st->regmap, AXI_DAC_CUSTOM_CTRL_REG,

---
base-commit: 4dd0ce442fa57f5274878c89223362344f28224c
change-id: 20250219-wip-bl-axi-dac-add-enum-check-8bb617285793

Best regards,
-- 
Angelo Dureghello <adureghello@...libre.com>