Bluetooth: hci_qca: Avoid missing rampatch failure with userspace fw loader

commit 7dc5fe0 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 <[email protected]>
CC: Nicolas Dechesne <[email protected]>
CC: Marcel Holtmann <[email protected]>
CC: Johan Hedberg <[email protected]>
CC: Stable <[email protected]>
Signed-off-by: Amit Pundir <[email protected]>
Signed-off-by: Marcel Holtmann <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>

Author: pundiramit

drivers/bluetooth/hci_qca.c

@@ -936,6 +936,12 @@ 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 */