[PATCH 6.6 049/273] platform/x86: int3472: Check for adev == NULL

[Greg Kroah-Hartman <gregkh@linuxfoundation.org>]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Hans de Goede <hdegoede@redhat.com>

[ Upstream commit cd2fd6eab480dfc247b737cf7a3d6b009c4d0f1c ]

Not all devices have an ACPI companion fwnode, so adev might be NULL. This
can e.g. (theoretically) happen when a user manually binds one of
the int3472 drivers to another i2c/platform device through sysfs.

Add a check for adev not being set and return -ENODEV in that case to
avoid a possible NULL pointer deref in skl_int3472_get_acpi_buffer().

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20241209220522.25288-1-hdegoede@redhat.com
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/platform/x86/intel/int3472/discrete.c | 3 +++
 drivers/platform/x86/intel/int3472/tps68470.c | 3 +++
 2 files changed, 6 insertions(+)

diff --git a/drivers/platform/x86/intel/int3472/discrete.c b/drivers/platform/x86/intel/int3472/discrete.c
index e33c2d75975cf..d56f79043f5e2 100644
--- a/drivers/platform/x86/intel/int3472/discrete.c
+++ b/drivers/platform/x86/intel/int3472/discrete.c
@@ -284,6 +284,9 @@ static int skl_int3472_discrete_probe(struct platform_device *pdev)
 	struct int3472_cldb cldb;
 	int ret;
 
+	if (!adev)
+		return -ENODEV;
+
 	ret = skl_int3472_fill_cldb(adev, &cldb);
 	if (ret) {
 		dev_err(&pdev->dev, "Couldn't fill CLDB structure\n");
diff --git a/drivers/platform/x86/intel/int3472/tps68470.c b/drivers/platform/x86/intel/int3472/tps68470.c
index 1e107fd49f828..81ac4c6919630 100644
--- a/drivers/platform/x86/intel/int3472/tps68470.c
+++ b/drivers/platform/x86/intel/int3472/tps68470.c
@@ -152,6 +152,9 @@ static int skl_int3472_tps68470_probe(struct i2c_client *client)
 	int ret;
 	int i;
 
+	if (!adev)
+		return -ENODEV;
+
 	n_consumers = skl_int3472_fill_clk_pdata(&client->dev, &clk_pdata);
 	if (n_consumers < 0)
 		return n_consumers;
-- 
2.39.5