Patch "mtd: nand: gpmi: Fix gpmi_nand_init() error path" has been added to the 4.9-stable tree

Patch "mtd: nand: gpmi: Fix gpmi_nand_init() error path" has been added to the 4.9-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    mtd: nand: gpmi: Fix gpmi_nand_init() error path

to the 4.9-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     mtd-nand-gpmi-fix-gpmi_nand_init-error-path.patch
and it can be found in the queue-4.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From foo@baz Mon Apr  9 17:09:24 CEST 2018
From: Boris Brezillon <boris.brezillon@free-electrons.com>
Date: Mon, 10 Apr 2017 10:35:17 +0200
Subject: mtd: nand: gpmi: Fix gpmi_nand_init() error path

From: Boris Brezillon <boris.brezillon@free-electrons.com>


[ Upstream commit 4d02423e9afe6c46142ce98bbcaf5167316dbfbf ]

The GPMI driver is wrongly assuming that nand_release() can safely be
called on an uninitialized/unregistered NAND device.

Add a new err_nand_cleanup label in the error path and only execute if
nand_scan_tail() succeeded.

Note that we now call nand_cleanup() instead of nand_release()
(nand_release() is actually grouping the mtd_device_unregister() and
nand_cleanup() in one call) because there's no point in trying to
unregister a device that has never been registered.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Reviewed-by: Marek Vasut <marek.vasut@gmail.com>
Acked-by: Han Xu <han.xu@nxp.com>
Reviewed-by: Marek Vasut <marek.vasut@gmail.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/mtd/nand/gpmi-nand/gpmi-nand.c |   10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

--- a/drivers/mtd/nand/gpmi-nand/gpmi-nand.c
+++ b/drivers/mtd/nand/gpmi-nand/gpmi-nand.c
@@ -2047,18 +2047,20 @@ static int gpmi_nand_init(struct gpmi_na
 
 	ret = nand_boot_init(this);
 	if (ret)
-		goto err_out;
+		goto err_nand_cleanup;
 	ret = chip->scan_bbt(mtd);
 	if (ret)
-		goto err_out;
+		goto err_nand_cleanup;
 
 	ret = mtd_device_register(mtd, NULL, 0);
 	if (ret)
-		goto err_out;
+		goto err_nand_cleanup;
 	return 0;
 
+err_nand_cleanup:
+	nand_cleanup(chip);
 err_out:
-	gpmi_nand_exit(this);
+	gpmi_free_dma_buffer(this);
 	return ret;
 }
 


Patches currently in stable-queue which might be from boris.brezillon@free-electrons.com are

queue-4.9/mtd-nand-gpmi-fix-gpmi_nand_init-error-path.patch
queue-4.9/mtd-mtd_oobtest-handle-bitflips-during-reads.patch
queue-4.9/mtd-nand-check-ecc-total-sanity-in-nand_scan_tail.patch