linux-kernel - [PATCH] firmware: stratix10-svc: Fix some error handling paths in 'stratix10_svc_drv

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Date:   Sun, 26 Apr 2020 21:03:07 +0200
From:   Christophe JAILLET <christophe.jaillet@...adoo.fr>
To:     richard.gong@...ux.intel.com, gregkh@...uxfoundation.org,
        atull@...nel.org
Cc:     linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org,
        Christophe JAILLET <christophe.jaillet@...adoo.fr>
Subject: [PATCH] firmware: stratix10-svc: Fix some error handling paths in 'stratix10_svc_drv_probe()'

If an error occurs after calling 'kfifo_alloc()', the allocated memory
should be freed with 'kfifo_free()', as already done in the remove
function.

Fixes: b5dc75c915cd ("firmware: stratix10-svc: extend svc to support new RSU features")
Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
---
 drivers/firmware/stratix10-svc.c | 15 +++++++++++----
 1 file changed, 11 insertions(+), 4 deletions(-)

diff --git a/drivers/firmware/stratix10-svc.c b/drivers/firmware/stratix10-svc.c
index d5f0769f3761..cc9df9589195 100644
--- a/drivers/firmware/stratix10-svc.c
+++ b/drivers/firmware/stratix10-svc.c
@@ -1043,24 +1043,31 @@ static int stratix10_svc_drv_probe(struct platform_device *pdev)
 
 	/* add svc client device(s) */
 	svc = devm_kzalloc(dev, sizeof(*svc), GFP_KERNEL);
-	if (!svc)
-		return -ENOMEM;
+	if (!svc) {
+		ret = -ENOMEM;
+		goto err_free_kfifo;
+	}
 
 	svc->stratix10_svc_rsu = platform_device_alloc(STRATIX10_RSU, 0);
 	if (!svc->stratix10_svc_rsu) {
 		dev_err(dev, "failed to allocate %s device\n", STRATIX10_RSU);
-		return -ENOMEM;
+		ret = -ENOMEM;
+		goto err_free_kfifo;
 	}
 
 	ret = platform_device_add(svc->stratix10_svc_rsu);
 	if (ret) {
 		platform_device_put(svc->stratix10_svc_rsu);
-		return ret;
+		goto err_free_kfifo;
 	}
 	dev_set_drvdata(dev, svc);
 
 	pr_info("Intel Service Layer Driver Initialized\n");
 
+	return 0;
+
+err_free_kfifo:
+	kfifo_free(&controller->svc_fifo);
 	return ret;
 }
 
-- 
2.25.1