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Date: Wed, 06 Jan 2010 23:44:45 +0200 From: Maxim Levitsky <maximlevitsky@...il.com> To: linux-kernel <linux-kernel@...r.kernel.org> Cc: linux-mtd <linux-mtd@...ts.infradead.org>, Alex Dubov <oakad@...oo.com>, joern <joern@...fs.org> Subject: [PATCH 1/9] MTD: call remove notifiers before removing the device >>From d8cb6b03919de5ab1587cd4340c684f2c468aec7 Mon Sep 17 00:00:00 2001 From: Maxim Levitsky <maximlevitsky@...il.com> Date: Tue, 5 Jan 2010 22:29:31 +0200 Subject: [PATCH 1/9] MTD: call remove notifiers before removing the device, so users have chance to free the mtd device Signed-off-by: Maxim Levitsky <maximlevitsky@...il.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 467a4f1..738e329 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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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