From 75c0b84d41c6f08c0cb083464907005683ef2920 Mon Sep 17 00:00:00 2001 From: Maxim Levitsky Date: Mon, 22 Feb 2010 20:39:32 +0200 Subject: [PATCH] mtd: call the remove notifiers before assuming it is in use Now that mtd block common layer is prepared for proper hotplug support, enable it here Now all users of the mtd device have a chance to put the mtd device when they are notified to do so, and they have to do so to make hotplug work. [dwmw2: There's more work to be done to fix hotplug in the general case, but this is a reasonable start] Signed-off-by: Maxim Levitsky Signed-off-by: David Woodhouse --- drivers/mtd/mtdcore.c | 19 +++++++++++-------- 1 file changed, 11 insertions(+), 8 deletions(-) diff --git a/drivers/mtd/mtdcore.c b/drivers/mtd/mtdcore.c index 67669a7..70a7858 100644 --- a/drivers/mtd/mtdcore.c +++ b/drivers/mtd/mtdcore.c @@ -350,31 +350,34 @@ fail_locked: int del_mtd_device (struct mtd_info *mtd) { int ret; + struct mtd_notifier *not; mutex_lock(&mtd_table_mutex); if (idr_find(&mtd_idr, mtd->index) != mtd) { ret = -ENODEV; - } else if (mtd->usecount) { + goto out_error; + } + + /* No need to get a refcount on the module containing + the notifier, since we hold the mtd_table_mutex */ + list_for_each_entry(not, &mtd_notifiers, list) + not->remove(mtd); + + if (mtd->usecount) { printk(KERN_NOTICE "Removing MTD device #%d (%s) with use count %d\n", mtd->index, mtd->name, mtd->usecount); ret = -EBUSY; } else { - struct mtd_notifier *not; - device_unregister(&mtd->dev); - /* No need to get a refcount on the module containing - the notifier, since we hold the mtd_table_mutex */ - list_for_each_entry(not, &mtd_notifiers, list) - not->remove(mtd); - idr_remove(&mtd_idr, mtd->index); module_put(THIS_MODULE); ret = 0; } +out_error: mutex_unlock(&mtd_table_mutex); return ret; } -- 2.7.4