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mtd: core: clear out unregistered devices a bit more

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This allows an MTD device that has been unregistered to be easily
re-registered later without triggering spurious "already registered"
warnings in mtd_device_parse_register() and add_mtd_device().

Signed-off-by: Zev Weiss <zev@bewilderbeest.net>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20211015185049.3318-1-zev@bewilderbeest.net
This commit is contained in:
Zev Weiss 2021-10-15 11:50:48 -07:00 committed by Miquel Raynal
parent b4a0de29f0
commit 00596576a0
1 changed files with 6 additions and 1 deletions
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7
drivers/mtd/mtdcore.c
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@ -747,6 +747,9 @@ int del_mtd_device(struct mtd_info *mtd)
device_unregister(&mtd->dev);
/* Clear dev so mtd can be safely re-registered later if desired */
memset(&mtd->dev, 0, sizeof(mtd->dev));
idr_remove(&mtd_idr, mtd->index);
of_node_put(mtd_get_of_node(mtd));
@ -1018,8 +1021,10 @@ int mtd_device_unregister(struct mtd_info *master)
{
int err;
if (master->_reboot)
if (master->_reboot) {
unregister_reboot_notifier(&master->reboot_notifier);
memset(&master->reboot_notifier, 0, sizeof(master->reboot_notifier));
}
if (master->otp_user_nvmem)
nvmem_unregister(master->otp_user_nvmem);