[PATCH] Bluetooth: btintel: Don't log unsupported debug features as an error

[Hex Lindqvist <hex@freenixos.com>]

Since commit af395330abed ("Bluetooth: btintel: Add Intel devcoredump
support"), setup sends Read Supported Features (0xfca6) to decide
whether to register devcoredump. Older controllers such as the 8260
and 8265 reject it with Command Disallowed, so every probe logs:

  Bluetooth: hci0: Reading supported features failed (-16)
  Bluetooth: hci0: Error reading debug features

This is harmless: it happens after the firmware is loaded and only
means devcoredump is not registered.

Log the failure at debug level there, and keep the error in
btintel_set_quality_report(), where the user asked for the feature.

Tested on an 8265 (8087:0a2b): the messages are gone and Bluetooth
works as before.

AI was used to help write and test this patch.

Fixes: af395330abed ("Bluetooth: btintel: Add Intel devcoredump support")
Closes: https://bugzilla.kernel.org/show_bug.cgi?id=219387
Signed-off-by: Hex Lindqvist <hex@freenixos.com>
---
 drivers/bluetooth/btintel.c | 11 +++++------
 1 file changed, 5 insertions(+), 6 deletions(-)

diff --git a/drivers/bluetooth/btintel.c b/drivers/bluetooth/btintel.c
index a0aa110f4cdd..31dec65d3327 100644
--- a/drivers/bluetooth/btintel.c
+++ b/drivers/bluetooth/btintel.c
@@ -1532,11 +1532,8 @@ static int btintel_read_debug_features(struct hci_dev *hdev,
 	 */
 	skb = __hci_cmd_sync(hdev, 0xfca6, sizeof(page_no), &page_no,
 			     HCI_INIT_TIMEOUT);
-	if (IS_ERR(skb)) {
-		bt_dev_err(hdev, "Reading supported features failed (%ld)",
-			   PTR_ERR(skb));
+	if (IS_ERR(skb))
 		return PTR_ERR(skb);
-	}
 
 	if (skb->len != (sizeof(features->page1) + 3)) {
 		bt_dev_err(hdev, "Supported features event size mismatch");
@@ -1653,8 +1650,10 @@ int btintel_set_quality_report(struct hci_dev *hdev, bool enable)
 	 * supported, need to load the additional DDC config to enable.
 	 */
 	err = btintel_read_debug_features(hdev, &features);
-	if (err)
+	if (err) {
+		bt_dev_err(hdev, "Reading supported features failed (%d)", err);
 		return err;
+	}
 
 	/* Set or reset the debug features. */
 	if (enable)
@@ -1705,7 +1704,7 @@ static int btintel_register_devcoredump_support(struct hci_dev *hdev)
 
 	err = btintel_read_debug_features(hdev, &features);
 	if (err) {
-		bt_dev_info(hdev, "Error reading debug features");
+		bt_dev_dbg(hdev, "Reading supported features failed (%d)", err);
 		return err;
 	}
 

base-commit: da3cc02587c629420603df4395179ec82955c941
-- 
2.56.0