linux-kernel - [PATCH] fsi: master-ast-cf: Fix memory leak

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Message-ID: <20180725133832.GA20837@embeddedor.com>
Date:   Wed, 25 Jul 2018 08:38:32 -0500
From:   "Gustavo A. R. Silva" <gustavo@...eddedor.com>
To:     Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        linux-kernel@...r.kernel.org
Cc:     "Gustavo A. R. Silva" <gustavo@...eddedor.com>
Subject: [PATCH] fsi: master-ast-cf: Fix memory leak

In case memory resources for *fw* were allocated, release them
before return.

Addresses-Coverity-ID: 1472044 ("Resource leak")
Fixes: 6a794a27daca ("fsi: master-ast-cf: Add new FSI master using Aspeed ColdFire")
Signed-off-by: Gustavo A. R. Silva <gustavo@...eddedor.com>
---
 drivers/fsi/fsi-master-ast-cf.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/fsi/fsi-master-ast-cf.c b/drivers/fsi/fsi-master-ast-cf.c
index c4a3557..e39a4630 100644
--- a/drivers/fsi/fsi-master-ast-cf.c
+++ b/drivers/fsi/fsi-master-ast-cf.c
@@ -861,7 +861,8 @@ static int load_copro_firmware(struct fsi_master_acf *master)
 	if (sig != wanted_sig) {
 		dev_err(master->dev, "Failed to locate image sig %04x in FW blob\n",
 			wanted_sig);
-		return -ENODEV;
+		rc = -ENODEV;
+		goto release_fw;
 	}
 	if (size > master->cf_mem_size) {
 		dev_err(master->dev, "FW size (%zd) bigger than memory reserve (%zd)\n",
@@ -870,8 +871,9 @@ static int load_copro_firmware(struct fsi_master_acf *master)
 	} else {
 		memcpy_toio(master->cf_mem, data, size);
 	}
-	release_firmware(fw);
 
+release_fw:
+	release_firmware(fw);
 	return rc;
 }
 
-- 
2.7.4