Messages in this thread Patch in this message | | | Subject | [PATCH 1/9] MTD: call remove notifiers before removing the device | From | Maxim Levitsky <> | Date | Tue, 12 Jan 2010 21:29:43 +0200 |
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>From 1855da2a21882c803e5dfcfb556fff5bc6989c31 Mon Sep 17 00:00:00 2001 From: Maxim Levitsky <maximlevitsky@gmail.com> Date: Fri, 8 Jan 2010 15:14:20 +0200 Subject: [PATCH 1/9] MTD: call remove notifiers before removing the device
This is first step in implementing proper hotplug support. 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.
Signed-off-by: Maxim Levitsky <maximlevitsky@gmail.com> --- drivers/mtd/mtdcore.c | 21 +++++++++++---------- 1 files changed, 11 insertions(+), 10 deletions(-)
diff --git a/drivers/mtd/mtdcore.c b/drivers/mtd/mtdcore.c index c356c0a..87ff83f 100644 --- a/drivers/mtd/mtdcore.c +++ b/drivers/mtd/mtdcore.c @@ -341,31 +341,32 @@ int add_mtd_device(struct mtd_info *mtd) int del_mtd_device (struct mtd_info *mtd) { int ret; + struct mtd_notifier *not; mutex_lock(&mtd_table_mutex); if (mtd_table[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); - mtd_table[mtd->index] = NULL; - module_put(THIS_MODULE); ret = 0; } +out_error: mutex_unlock(&mtd_table_mutex); return ret; } -- 1.6.3.3
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