mtd: rawnand: diskonchip: Fix the probe error path

commit c5be12e45940f1aa1b5dfa04db5d15ad24f7c896 upstream.

Not sure nand_cleanup() is the right function to call here but in any
case it is not nand_release(). Indeed, even a comment says that
calling nand_release() is a bit of a hack as there is no MTD device to
unregister. So switch to nand_cleanup() for now and drop this
comment.

There is no Fixes tag applying here as the use of nand_release()
in this driver predates by far the introduction of nand_cleanup() in
commit d44154f969a4 ("mtd: nand: Provide nand_cleanup() function to free NAND related resources")
which makes this change possible. However, pointing this commit as the
culprit for backporting purposes makes sense even if it did not intruce
any bug.

Fixes: d44154f969a4 ("mtd: nand: Provide nand_cleanup() function to free NAND related resources")
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/linux-mtd/20200519130035.1883-13-miquel.raynal@bootlin.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/mtd/nand/raw/diskonchip.c b/drivers/mtd/nand/raw/diskonchip.c
index c2a391ad2c3508cd74c686887d035a8e78a1f15d..baabc663355764178bb33a4511f2f034a7cce3d5 100644 (file)
--- a/drivers/mtd/nand/raw/diskonchip.c
+++ b/drivers/mtd/nand/raw/diskonchip.c
@@ -1609,13 +1609,10 @@ static int __init doc_probe(unsigned long physadr)
                numchips = doc2001_init(mtd);
 
        if ((ret = nand_scan(nand, numchips)) || (ret = doc->late_init(mtd))) {
-               /* DBB note: i believe nand_release is necessary here, as
+               /* DBB note: i believe nand_cleanup is necessary here, as
                   buffers may have been allocated in nand_base.  Check with
                   Thomas. FIX ME! */
-               /* nand_release will call mtd_device_unregister, but we
-                  haven't yet added it.  This is handled without incident by
-                  mtd_device_unregister, as far as I can tell. */
-               nand_release(nand);
+               nand_cleanup(nand);
                goto fail;
        }