linux-kernel - [PATCH 5/9] mtd: Allow dynamic major/minor number for mtd block devices

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Date:	Fri, 02 Mar 2007 15:54:49 +0000
From:	Richard Purdie <rpurdie@...nedhand.com>
To:	Nick Piggin <nickpiggin@...oo.com.au>,
	Hugh Dickins <hugh@...itas.com>,
	kernel list <linux-kernel@...r.kernel.org>,
	linux-mtd <linux-mtd@...ts.infradead.org>,
	David Woodhouse <dwmw2@...radead.org>
Subject: [PATCH 5/9] mtd: Allow dynamic major/minor number for mtd block
	devices

Allow mtd block devices to have a dynamically allocated major/minor 
numbers if tr->major == 0.

Signed-off-by: Richard Purdie <rpurdie@...nedhand.com>

---
 drivers/mtd/mtd_blkdevs.c |    5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

Index: linux/drivers/mtd/mtd_blkdevs.c
===================================================================
--- linux.orig/drivers/mtd/mtd_blkdevs.c	2007-02-28 18:16:52.000000000 +0000
+++ linux/drivers/mtd/mtd_blkdevs.c	2007-03-02 14:46:29.000000000 +0000
@@ -380,13 +380,16 @@ int register_mtd_blktrans(struct mtd_blk
 	mutex_lock(&mtd_table_mutex);
 
 	ret = register_blkdev(tr->major, tr->name);
-	if (ret) {
+	if (ret < 0) {
 		printk(KERN_WARNING "Unable to register %s block device on major %d: %d\n",
 		       tr->name, tr->major, ret);
 		kfree(tr->blkcore_priv);
 		mutex_unlock(&mtd_table_mutex);
 		return ret;
 	}
+	if (!tr->major)
+		tr->major = ret;
+
 	spin_lock_init(&tr->blkcore_priv->queue_lock);
 	init_completion(&tr->blkcore_priv->thread_dead);
 	init_waitqueue_head(&tr->blkcore_priv->thread_wq);


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