Patch "mtd: nand: assign reasonable default name for NAND drivers" has been added to the 4.4-stable tree

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

mtd: nand: assign reasonable default name for NAND drivers

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-assign-reasonable-default-name-for-nand-drivers.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 <[email protected]> know about it.

From: Brian Norris <[email protected]>
Date: Tue, 5 Jan 2016 10:39:45 -0800
Subject: mtd: nand: assign reasonable default name for NAND drivers

From: Brian Norris <[email protected]>

commit f7a8e38f07a17be90758559fe66fe7337096053f upstream.

Commits such as commit 853f1c58c4b2 ("mtd: nand: omap2: show parent device structure in sysfs") attempt to rely on the core MTD code to set the MTD name based on the parent device. However, nand_base tries to set a different default name according to the flash name (e.g., extracted from the ONFI parameter page), which means NAND drivers will never make use of the MTD defaults. This is not the intention of commit 853f1c58c4b2.

This results in problems when trying to use the cmdline partition parser, since the MTD name is different than expected. Let's fix this by providing a default NAND name, where possible.

Note that this is not really a great default name in the long run, since this means that if there are multiple MTDs attached to the same controller device, they will have the same name. But that is an existing issue and requires future work on a better controller vs. flash chip abstraction to fix properly.

---
 drivers/mtd/nand/nand_base.c |    3 +++
 1 file changed, 3 insertions(+)

@@ -3995,6 +3995,9 @@ int nand_scan_ident(struct mtd_info *mtd
 			return ret;
 	}
 
+	if (!mtd->name && mtd->dev.parent)
+		mtd->name = dev_name(mtd->dev.parent);
+
 	/* Set the default functions */
 	nand_set_defaults(chip, chip->options & NAND_BUSWIDTH_16);
 

Patches currently in stable-queue which might be from [email protected] are

queue-4.4/mtd-nand-assign-reasonable-default-name-for-nand-drivers.patch