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Date: Wed, 29 Sep 2021 04:54:04 -0700 From: Zev Weiss <zev@...ilderbeest.net> To: openbmc@...ts.ozlabs.org Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, Jeremy Kerr <jk@...econstruct.com.au>, Joel Stanley <joel@....id.au>, Cédric Le Goater <clg@...d.org>, Zev Weiss <zev@...ilderbeest.net>, Miquel Raynal <miquel.raynal@...tlin.com>, Richard Weinberger <richard@....at>, Vignesh Raghavendra <vigneshr@...com>, linux-mtd@...ts.infradead.org, linux-kernel@...r.kernel.org Subject: [PATCH 2/6] mtd: core: clear out unregistered devices a bit more This allows an MTD device that has been unregistered to be easily re-registered later without triggering "already registered" warnings in mtd_device_parse_register() and add_mtd_device(). Signed-off-by: Zev Weiss <zev@...ilderbeest.net> --- drivers/mtd/mtdcore.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/mtd/mtdcore.c b/drivers/mtd/mtdcore.c index c8fd7f758938..e22266f63ae9 100644 --- a/drivers/mtd/mtdcore.c +++ b/drivers/mtd/mtdcore.c @@ -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); -- 2.33.0
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