Patch "axonram: Fix gendisk handling" has been added to the 4.9-stable tree

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

axonram: Fix gendisk handling

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:
axonram-fix-gendisk-handling.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 <[email protected]> know about it.

From: Jan Kara <[email protected]>
Date: Wed, 8 Mar 2017 14:56:05 +0100
Subject: axonram: Fix gendisk handling

From: Jan Kara <[email protected]>

[ Upstream commit 672a2c87c83649fb0167202342ce85af9a3b4f1c ]

It is invalid to call del_gendisk() when disk->queue is NULL. Fix error handling in axon_ram_probe() to avoid doing that.

Also del_gendisk() does not drop a reference to gendisk allocated by alloc_disk(). That has to be done by put_disk(). Add that call where needed.

---
 arch/powerpc/sysdev/axonram.c |    5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

@@ -274,7 +274,9 @@ failed:
 			if (bank->disk->major > 0)
 				unregister_blkdev(bank->disk->major,
 						bank->disk->disk_name);
-			del_gendisk(bank->disk);
+			if (bank->disk->flags & GENHD_FL_UP)
+				del_gendisk(bank->disk);
+			put_disk(bank->disk);
 		}
 		device->dev.platform_data = NULL;
 		if (bank->io_addr != 0)

@@ -299,6 +301,7 @@ axon_ram_remove(struct platform_device *
 	device_remove_file(&device->dev, &dev_attr_ecc);
 	free_irq(bank->irq_id, device);
 	del_gendisk(bank->disk);
+	put_disk(bank->disk);
 	iounmap((void __iomem *) bank->io_addr);
 	kfree(bank);
 

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

queue-4.9/axonram-fix-gendisk-handling.patch