This is a note to let you know that I've just added the patch titled
mtd: nand: Drop mtd.owner requirement in nand_scan
to the 4.4-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-drop-mtd.owner-requirement-in-nand_scan.patch
and it can be found in the queue-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 20c07a5bf094198ff2382aa5e7c930b3c9807792 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ezequiel=20Garc=C3=ADa?= <ezequiel@xxxxxxxxxxxxxxxxxxxx>
Date: Fri, 1 Apr 2016 18:29:23 -0300
Subject: mtd: nand: Drop mtd.owner requirement in nand_scan
From: Ezequiel García <ezequiel@xxxxxxxxxxxxxxxxxxxx>
commit 20c07a5bf094198ff2382aa5e7c930b3c9807792 upstream.
Since commit 807f16d4db95 ("mtd: core: set some defaults
when dev.parent is set"), it's now legal for drivers
to call nand_scan and nand_scan_ident without setting
mtd.owner.
Drop the check and while at it remove the BUG() abuse.
Fixes: 807f16d4db95 ("mtd: core: set some defaults when dev.parent is set")
Signed-off-by: Ezequiel Garcia <ezequiel@xxxxxxxxxxxxxxxxxxxx>
Acked-by: Boris Brezillon <boris.brezillon@xxxxxxxxxxxxxxxxxx>
[Brian: editorial note - while commit 807f16d4db95 wasn't explicitly
broken, some follow-up commits in the v4.4 release broke a few
drivers, since they would hit this BUG() if they used nand_scan()
and were built as modules]
Signed-off-by: Brian Norris <computersforpeace@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/mtd/nand/nand_base.c | 10 +---------
1 file changed, 1 insertion(+), 9 deletions(-)
--- a/drivers/mtd/nand/nand_base.c
+++ b/drivers/mtd/nand/nand_base.c
@@ -3979,7 +3979,6 @@ static int nand_dt_init(struct mtd_info
* This is the first phase of the normal nand_scan() function. It reads the
* flash ID and sets up MTD fields accordingly.
*
- * The mtd->owner field must be set to the module of the caller.
*/
int nand_scan_ident(struct mtd_info *mtd, int maxchips,
struct nand_flash_dev *table)
@@ -4403,19 +4402,12 @@ EXPORT_SYMBOL(nand_scan_tail);
*
* This fills out all the uninitialized function pointers with the defaults.
* The flash ID is read and the mtd/chip structures are filled with the
- * appropriate values. The mtd->owner field must be set to the module of the
- * caller.
+ * appropriate values.
*/
int nand_scan(struct mtd_info *mtd, int maxchips)
{
int ret;
- /* Many callers got this wrong, so check for it for a while... */
- if (!mtd->owner && caller_is_module()) {
- pr_crit("%s called with NULL mtd->owner!\n", __func__);
- BUG();
- }
-
ret = nand_scan_ident(mtd, maxchips, NULL);
if (!ret)
ret = nand_scan_tail(mtd);
Patches currently in stable-queue which might be from ezequiel@xxxxxxxxxxxxxxxxxxxx are
queue-4.4/mtd-nand-drop-mtd.owner-requirement-in-nand_scan.patch
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