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[RESEND] Input: msg2638 - only read linux,keycodes array if necessary

Message ID 20221130210202.2069213-1-vincent.knecht@mailoo.org (mailing list archive)
State Accepted
Commit a5df8025f37a813f3f512ea3048ca505561b9c27
Headers show
Series [RESEND] Input: msg2638 - only read linux,keycodes array if necessary | expand

Commit Message

Vincent Knecht Nov. 30, 2022, 9:01 p.m. UTC
The linux,keycodes property is optional.
Fix the driver not probing when it's not specified.

Fixes: c18ef50346f2 ("Input: msg2638 - add support for msg2138 key events")
Signed-off-by: Vincent Knecht <vincent.knecht@mailoo.org>
---
Resending because of mailing issue,
ie. not appearing on mailing lists.
---
 drivers/input/touchscreen/msg2638.c | 16 +++++++++-------
 1 file changed, 9 insertions(+), 7 deletions(-)

Comments

Dmitry Torokhov Nov. 30, 2022, 11:15 p.m. UTC | #1
On Wed, Nov 30, 2022 at 10:01:59PM +0100, Vincent Knecht wrote:
> The linux,keycodes property is optional.
> Fix the driver not probing when it's not specified.
> 
> Fixes: c18ef50346f2 ("Input: msg2638 - add support for msg2138 key events")
> Signed-off-by: Vincent Knecht <vincent.knecht@mailoo.org>

Applied, thank you.
diff mbox series

Patch

diff --git a/drivers/input/touchscreen/msg2638.c b/drivers/input/touchscreen/msg2638.c
index 51b1c0e8a761..4c0816b09d33 100644
--- a/drivers/input/touchscreen/msg2638.c
+++ b/drivers/input/touchscreen/msg2638.c
@@ -412,13 +412,15 @@  static int msg2638_ts_probe(struct i2c_client *client)
 		msg2638->num_keycodes = ARRAY_SIZE(msg2638->keycodes);
 	}
 
-	error = device_property_read_u32_array(dev, "linux,keycodes",
-					       msg2638->keycodes,
-					       msg2638->num_keycodes);
-	if (error) {
-		dev_err(dev, "Unable to read linux,keycodes values: %d\n",
-			error);
-		return error;
+	if (msg2638->num_keycodes > 0) {
+		error = device_property_read_u32_array(dev, "linux,keycodes",
+						       msg2638->keycodes,
+						       msg2638->num_keycodes);
+		if (error) {
+			dev_err(dev, "Unable to read linux,keycodes values: %d\n",
+				error);
+			return error;
+		}
 	}
 
 	error = devm_request_threaded_irq(dev, client->irq,