netdev - [PATCH RESEND v2 2/3] Bluetooth: btqcomsmd: use HCI_QUIRK_USE_BDADDR

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Message-Id: <20181204201615.245574-3-mka@chromium.org>
Date:   Tue,  4 Dec 2018 12:16:14 -0800
From:   Matthias Kaehlcke <mka@...omium.org>
To:     Marcel Holtmann <marcel@...tmann.org>,
        Johan Hedberg <johan.hedberg@...il.com>,
        "David S . Miller" <davem@...emloft.net>,
        Loic Poulain <loic.poulain@...aro.org>
Cc:     linux-bluetooth@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Balakrishna Godavarthi <bgodavar@...eaurora.org>,
        Brian Norris <briannorris@...omium.org>,
        Dmitry Grinberg <dmitrygr@...gle.com>,
        Matthias Kaehlcke <mka@...omium.org>
Subject: [PATCH RESEND v2 2/3] Bluetooth: btqcomsmd: use HCI_QUIRK_USE_BDADDR_PROPERTY

Use the HCI_QUIRK_USE_BDADDR_PROPERTY quirk to let the HCI
core handle the reading of 'local-bd-address'. With this there
is no need to set HCI_QUIRK_INVALID_BDADDR, the case of a
non-existing or invalid fwnode property is handled by the core
code.

Signed-off-by: Matthias Kaehlcke <mka@...omium.org>
Reviewed-by: Balakrishna Godavarthi <bgodavar@...eaurora.org>
---
I couldn't actually test the changes in this driver since I
don't have a device with this controller. Could someone
from Qualcomm help with this?

Changes in v2:
- removed now unused field 'bdaddr' from struct btqcomsmd
- added 'Reviewed-by: Balakrishna Godavarthi <bgodavar@...eaurora.org>' tag
---
 drivers/bluetooth/btqcomsmd.c | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/drivers/bluetooth/btqcomsmd.c b/drivers/bluetooth/btqcomsmd.c
index 7df3eed1ef5e9..b3020fab6c8e3 100644
--- a/drivers/bluetooth/btqcomsmd.c
+++ b/drivers/bluetooth/btqcomsmd.c
@@ -28,7 +28,6 @@
 struct btqcomsmd {
 	struct hci_dev *hdev;
 
-	bdaddr_t bdaddr;
 	struct rpmsg_endpoint *acl_channel;
 	struct rpmsg_endpoint *cmd_channel;
 };
@@ -125,23 +124,10 @@ static int btqcomsmd_setup(struct hci_dev *hdev)
 		return PTR_ERR(skb);
 	kfree_skb(skb);
 
-	/* Devices do not have persistent storage for BD address. If no
-	 * BD address has been retrieved during probe, mark the device
-	 * as having an invalid BD address.
+	/* Devices do not have persistent storage for BD address. Retrieve
+	 * it from the firmware node property.
 	 */
-	if (!bacmp(&btq->bdaddr, BDADDR_ANY)) {
-		set_bit(HCI_QUIRK_INVALID_BDADDR, &hdev->quirks);
-		return 0;
-	}
-
-	/* When setting a configured BD address fails, mark the device
-	 * as having an invalid BD address.
-	 */
-	err = qca_set_bdaddr_rome(hdev, &btq->bdaddr);
-	if (err) {
-		set_bit(HCI_QUIRK_INVALID_BDADDR, &hdev->quirks);
-		return 0;
-	}
+	set_bit(HCI_QUIRK_USE_BDADDR_PROPERTY, &hdev->quirks);
 
 	return 0;
 }
@@ -169,15 +155,6 @@ static int btqcomsmd_probe(struct platform_device *pdev)
 	if (IS_ERR(btq->cmd_channel))
 		return PTR_ERR(btq->cmd_channel);
 
-	/* The local-bd-address property is usually injected by the
-	 * bootloader which has access to the allocated BD address.
-	 */
-	if (!of_property_read_u8_array(pdev->dev.of_node, "local-bd-address",
-				       (u8 *)&btq->bdaddr, sizeof(bdaddr_t))) {
-		dev_info(&pdev->dev, "BD address %pMR retrieved from device-tree",
-			 &btq->bdaddr);
-	}
-
 	hdev = hci_alloc_dev();
 	if (!hdev)
 		return -ENOMEM;
-- 
2.20.0.rc1.387.gf8505762e3-goog