[PATCH 13/23] mtd: bdi init hooks

[Peter Zijlstra]

split off because the relevant mtd changes seem particular to -mm

Signed-off-by: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
Cc: David Woodhouse <dwmw2@xxxxxxxxxxxxx>
---
 drivers/mtd/mtdcore.c |    9 +++++++++
 1 file changed, 9 insertions(+)

Index: linux-2.6/drivers/mtd/mtdcore.c
===================================================================
--- linux-2.6.orig/drivers/mtd/mtdcore.c
+++ linux-2.6/drivers/mtd/mtdcore.c
@@ -48,6 +48,7 @@ static LIST_HEAD(mtd_notifiers);
 int add_mtd_device(struct mtd_info *mtd)
 {
 	int i;
+	int err;
 
 	if (!mtd->backing_dev_info) {
 		switch (mtd->type) {
@@ -62,6 +63,9 @@ int add_mtd_device(struct mtd_info *mtd)
 			break;
 		}
 	}
+	err = bdi_init(mtd->backing_dev_info);
+	if (err)
+		return 1;
 
 	BUG_ON(mtd->writesize == 0);
 	mutex_lock(&mtd_table_mutex);
@@ -102,6 +106,7 @@ int add_mtd_device(struct mtd_info *mtd)
 		}
 
 	mutex_unlock(&mtd_table_mutex);
+	bdi_destroy(mtd->backing_dev_info);
 	return 1;
 }
 
@@ -144,6 +149,10 @@ int del_mtd_device (struct mtd_info *mtd
 	}
 
 	mutex_unlock(&mtd_table_mutex);
+
+	if (mtd->backing_dev_info)
+		bdi_destroy(mtd->backing_dev_info);
+
 	return ret;
 }
 

--

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