linux-kernel - [PATCH 5.4 28/66] EDAC/sysfs: Remove csrow objects on errors

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Date:   Tue, 18 Feb 2020 20:54:55 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Robert Richter <rrichter@...vell.com>,
        Borislav Petkov <bp@...e.de>,
        John Garry <john.garry@...wei.com>
Subject: [PATCH 5.4 28/66] EDAC/sysfs: Remove csrow objects on errors

From: Robert Richter <rrichter@...vell.com>

commit 4d59588c09f2a2daedad2a544d4d1b602ab3a8af upstream.

All created csrow objects must be removed in the error path of
edac_create_csrow_objects(). The objects have been added as devices.

They need to be removed by doing a device_del() *and* put_device() call
to also free their memory. The missing put_device() leaves a memory
leak. Use device_unregister() instead of device_del() which properly
unregisters the device doing both.

Fixes: 7adc05d2dc3a ("EDAC/sysfs: Drop device references properly")
Signed-off-by: Robert Richter <rrichter@...vell.com>
Signed-off-by: Borislav Petkov <bp@...e.de>
Tested-by: John Garry <john.garry@...wei.com>
Cc: <stable@...r.kernel.org>
Link: https://lkml.kernel.org/r/20200212120340.4764-4-rrichter@marvell.com
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/edac/edac_mc_sysfs.c |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

--- a/drivers/edac/edac_mc_sysfs.c
+++ b/drivers/edac/edac_mc_sysfs.c
@@ -447,8 +447,7 @@ error:
 		csrow = mci->csrows[i];
 		if (!nr_pages_per_csrow(csrow))
 			continue;
-
-		device_del(&mci->csrows[i]->dev);
+		device_unregister(&mci->csrows[i]->dev);
 	}
 
 	return err;