From: Chris Lew <clew@codeaurora.org>
Date: Fri, 4 Oct 2019 22:27:00 +0000 (-0700)
Subject: rpmsg: glink: Fix rpmsg_register_device err handling
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=90be4d4327fc5560b77693dd63922bcc331fa4d8;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

rpmsg: glink: Fix rpmsg_register_device err handling

commit f7e714988edaffe6ac578318e99501149b067ba0 upstream.

The device release function is set before registering with rpmsg. If
rpmsg registration fails, the framework will call device_put(), which
invokes the release function. The channel create logic does not need to
free rpdev if rpmsg_register_device() fails and release is called.

Fixes: b4f8e52b89f6 ("rpmsg: Introduce Qualcomm RPM glink driver")
Cc: stable@vger.kernel.org
Tested-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Chris Lew <clew@codeaurora.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/rpmsg/qcom_glink_native.c b/drivers/rpmsg/qcom_glink_native.c
index aef24a4c9826..306b3cc6ab13 100644
--- a/drivers/rpmsg/qcom_glink_native.c
+++ b/drivers/rpmsg/qcom_glink_native.c
@@ -1400,15 +1400,13 @@ static int qcom_glink_rx_open(struct qcom_glink *glink, unsigned int rcid,
 
 		ret = rpmsg_register_device(rpdev);
 		if (ret)
-			goto free_rpdev;
+			goto rcid_remove;
 
 		channel->rpdev = rpdev;
 	}
 
 	return 0;
 
-free_rpdev:
-	kfree(rpdev);
 rcid_remove:
 	spin_lock_irqsave(&glink->idr_lock, flags);
 	idr_remove(&glink->rcids, channel->rcid);