linux-kernel - [PATCH 3/4] remoteproc: qcom: fix q6v5 probe error paths

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Message-Id: <20200228183359.16229-4-elder@linaro.org>
Date:   Fri, 28 Feb 2020 12:33:58 -0600
From:   Alex Elder <elder@...aro.org>
To:     Ohad Ben-Cohen <ohad@...ery.com>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Andy Gross <agross@...nel.org>
Cc:     linux-remoteproc@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 3/4] remoteproc: qcom: fix q6v5 probe error paths

Remove the remoteproc subdevices if an error occurs after they have
been added.

Have cleanup activity done in q6v5_remove() be done in the reverse
order they are set up in q6v5_probe() (and the same order they're
done in the q6v5_probe() error path).  Use a local variable for
the remoteproc pointer, which is used repeatedly.

Signed-off-by: Alex Elder <elder@...aro.org>
---
 drivers/remoteproc/qcom_q6v5_mss.c | 23 +++++++++++++++--------
 1 file changed, 15 insertions(+), 8 deletions(-)

diff --git a/drivers/remoteproc/qcom_q6v5_mss.c b/drivers/remoteproc/qcom_q6v5_mss.c
index a1cc9cbe038f..97093f4f58e1 100644
--- a/drivers/remoteproc/qcom_q6v5_mss.c
+++ b/drivers/remoteproc/qcom_q6v5_mss.c
@@ -1667,15 +1667,21 @@ static int q6v5_probe(struct platform_device *pdev)
 	qproc->sysmon = qcom_add_sysmon_subdev(rproc, "modem", 0x12);
 	if (IS_ERR(qproc->sysmon)) {
 		ret = PTR_ERR(qproc->sysmon);
-		goto detach_proxy_pds;
+		goto remove_ssr_subdev;
 	}
 
 	ret = rproc_add(rproc);
 	if (ret)
-		goto detach_proxy_pds;
+		goto remove_sysmon_subdev;
 
 	return 0;
 
+remove_sysmon_subdev:
+	qcom_remove_sysmon_subdev(qproc->sysmon);
+remove_ssr_subdev:
+	qcom_remove_ssr_subdev(qproc->rproc, &qproc->ssr_subdev);
+	qcom_remove_smd_subdev(qproc->rproc, &qproc->smd_subdev);
+	qcom_remove_glink_subdev(qproc->rproc, &qproc->glink_subdev);
 detach_proxy_pds:
 	q6v5_pds_detach(qproc, qproc->proxy_pds, qproc->proxy_pd_count);
 detach_active_pds:
@@ -1689,18 +1695,19 @@ static int q6v5_probe(struct platform_device *pdev)
 static int q6v5_remove(struct platform_device *pdev)
 {
 	struct q6v5 *qproc = platform_get_drvdata(pdev);
+	struct rproc *rproc = qproc->rproc;
 
-	rproc_del(qproc->rproc);
+	rproc_del(rproc);
 
 	qcom_remove_sysmon_subdev(qproc->sysmon);
-	qcom_remove_glink_subdev(qproc->rproc, &qproc->glink_subdev);
-	qcom_remove_smd_subdev(qproc->rproc, &qproc->smd_subdev);
-	qcom_remove_ssr_subdev(qproc->rproc, &qproc->ssr_subdev);
+	qcom_remove_ssr_subdev(rproc, &qproc->ssr_subdev);
+	qcom_remove_smd_subdev(rproc, &qproc->smd_subdev);
+	qcom_remove_glink_subdev(rproc, &qproc->glink_subdev);
 
-	q6v5_pds_detach(qproc, qproc->active_pds, qproc->active_pd_count);
 	q6v5_pds_detach(qproc, qproc->proxy_pds, qproc->proxy_pd_count);
+	q6v5_pds_detach(qproc, qproc->active_pds, qproc->active_pd_count);
 
-	rproc_free(qproc->rproc);
+	rproc_free(rproc);
 
 	return 0;
 }
-- 
2.20.1