linux-kernel - [PATCH 4.14 028/157] Bluetooth: hci_qca: Avoid missing rampatch failure with userspace fw loader

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Message-Id: <20180701160853.714702973@linuxfoundation.org>
Date:   Sun,  1 Jul 2018 18:21:40 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Loic Poulain <loic.poulain@...aro.org>,
        Nicolas Dechesne <nicolas.dechesne@...aro.org>,
        Marcel Holtmann <marcel@...tmann.org>,
        Johan Hedberg <johan.hedberg@...il.com>,
        Amit Pundir <amit.pundir@...aro.org>
Subject: [PATCH 4.14 028/157] Bluetooth: hci_qca: Avoid missing rampatch failure with userspace fw loader

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

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

From: Amit Pundir <amit.pundir@...aro.org>

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@...aro.org>
CC: Nicolas Dechesne <nicolas.dechesne@...aro.org>
CC: Marcel Holtmann <marcel@...tmann.org>
CC: Johan Hedberg <johan.hedberg@...il.com>
CC: Stable <stable@...r.kernel.org>
Signed-off-by: Amit Pundir <amit.pundir@...aro.org>
Signed-off-by: Marcel Holtmann <marcel@...tmann.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

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

--- a/drivers/bluetooth/hci_qca.c
+++ b/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 */