linux-kernel - [PATCH v2] i7core_edac: release resources on error in i7core_create_sysfs

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Date:	Tue, 3 Feb 2015 10:40:14 +0800
From:	Junjie Mao <junjie.mao@...mail.com>
To:	Mauro Carvalho Chehab <mchehab@....samsung.com>
CC:	Doug Thompson <dougthompson@...ssion.com>,
	Borislav Petkov <bp@...en8.de>, linux-edac@...r.kernel.org,
	linux-kernel@...r.kernel.org, Junjie Mao <junjie.mao@...mail.com>
Subject: [PATCH v2] i7core_edac: release resources on error in i7core_create_sysfs_devices

v2: do not call kfree on allocated devs after device_initialize is called

Signed-off-by: Junjie Mao <junjie.mao@...mail.com>
---
 drivers/edac/i7core_edac.c | 37 +++++++++++++++++++++++++------------
 1 file changed, 25 insertions(+), 12 deletions(-)

diff --git a/drivers/edac/i7core_edac.c b/drivers/edac/i7core_edac.c
index 9cd0b301f81b..f6a7b676d69c 100644
--- a/drivers/edac/i7core_edac.c
+++ b/drivers/edac/i7core_edac.c
@@ -1167,17 +1167,17 @@ static int i7core_create_sysfs_devices(struct mem_ctl_info *mci)
 		return rc;
 	rc = device_create_file(&mci->dev, &dev_attr_inject_type);
 	if (rc < 0)
-		return rc;
+		goto fail_remove_inject_section;
 	rc = device_create_file(&mci->dev, &dev_attr_inject_eccmask);
 	if (rc < 0)
-		return rc;
+		goto fail_remove_inject_type;
 	rc = device_create_file(&mci->dev, &dev_attr_inject_enable);
 	if (rc < 0)
-		return rc;
+		goto fail_remove_inject_eccmask;

 	pvt->addrmatch_dev = kzalloc(sizeof(*pvt->addrmatch_dev), GFP_KERNEL);
 	if (!pvt->addrmatch_dev)
-		return rc;
+		goto fail_remove_inject_enable;

 	pvt->addrmatch_dev->type = &addrmatch_type;
 	pvt->addrmatch_dev->bus = mci->dev.bus;
@@ -1190,16 +1190,13 @@ static int i7core_create_sysfs_devices(struct mem_ctl_info *mci)

 	rc = device_add(pvt->addrmatch_dev);
 	if (rc < 0)
-		return rc;
+		goto fail_free_addrmatch_dev;

 	if (!pvt->is_registered) {
 		pvt->chancounts_dev = kzalloc(sizeof(*pvt->chancounts_dev),
 					      GFP_KERNEL);
-		if (!pvt->chancounts_dev) {
-			put_device(pvt->addrmatch_dev);
-			device_del(pvt->addrmatch_dev);
-			return rc;
-		}
+		if (!pvt->chancounts_dev)
+			goto fail_del_addrmatch_dev;

 		pvt->chancounts_dev->type = &all_channel_counts_type;
 		pvt->chancounts_dev->bus = mci->dev.bus;
@@ -1211,10 +1208,26 @@ static int i7core_create_sysfs_devices(struct mem_ctl_info *mci)
 		edac_dbg(1, "creating %s\n", dev_name(pvt->chancounts_dev));

 		rc = device_add(pvt->chancounts_dev);
-		if (rc < 0)
-			return rc;
+		if (rc < 0) {
+			put_device(pvt->chancounts_dev);
+			goto fail_del_addrmatch_dev;
+		}
 	}
 	return 0;
+
+fail_del_addrmatch_dev:
+	device_del(pvt->addrmatch_dev);
+fail_free_addrmatch_dev:
+	put_device(pvt->addrmatch_dev);
+fail_remove_inject_enable:
+	device_create_file(&mci->dev, &dev_attr_inject_enable);
+fail_remove_inject_eccmask:
+	device_create_file(&mci->dev, &dev_attr_inject_eccmask);
+fail_remove_inject_type:
+	device_create_file(&mci->dev, &dev_attr_inject_type);
+fail_remove_inject_section:
+	device_create_file(&mci->dev, &dev_attr_inject_section);
+	return rc;
 }

 static void i7core_delete_sysfs_devices(struct mem_ctl_info *mci)
--
1.9.3
--
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