[PATCH 4.17 038/220] Bluetooth: hci_qca: Avoid missing rampatch failure with userspace fw loader

[Greg Kroah-Hartman]

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

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

From: Amit Pundir <amit.pundir@xxxxxxxxxx>

commit 7dc5fe0814c35ec4e7d2e8fa30abab72e0e6a172 upstream.

AOSP use userspace firmware loader to load firmwares, which will
return -EAGAIN in case qca/rampatch_00440302.bin is not found.
Since there is no rampatch for dragonboard820c QCA controller
revision, just make it work as is.

CC: Loic Poulain <loic.poulain@xxxxxxxxxx>
CC: Nicolas Dechesne <nicolas.dechesne@xxxxxxxxxx>
CC: Marcel Holtmann <marcel@xxxxxxxxxxxx>
CC: Johan Hedberg <johan.hedberg@xxxxxxxxx>
CC: Stable <stable@xxxxxxxxxxxxxxx>
Signed-off-by: Amit Pundir <amit.pundir@xxxxxxxxxx>
Signed-off-by: Marcel Holtmann <marcel@xxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 drivers/bluetooth/hci_qca.c |    6 ++++++
 1 file changed, 6 insertions(+)

--- a/drivers/bluetooth/hci_qca.c
+++ b/drivers/bluetooth/hci_qca.c
@@ -935,6 +935,12 @@ static int qca_setup(struct hci_uart *hu
 	} else if (ret == -ENOENT) {
 		/* No patch/nvm-config found, run with original fw/config */
 		ret = 0;
+	} else if (ret == -EAGAIN) {
+		/*
+		 * Userspace firmware loader will return -EAGAIN in case no
+		 * patch/nvm-config is found, so run with original fw/config.
+		 */
+		ret = 0;
 	}
 
 	/* Setup bdaddr */