* [PATCH] mtd: core: clear out unregistered devices a bit more
@ 2021-10-15 18:50 Zev Weiss
2021-11-19 18:48 ` Miquel Raynal
0 siblings, 1 reply; 2+ messages in thread
From: Zev Weiss @ 2021-10-15 18:50 UTC (permalink / raw)
To: linux-mtd
Cc: Zev Weiss, Miquel Raynal, Richard Weinberger,
Vignesh Raghavendra, Michael Walle, Zhen Lei, Lee Jones,
Dan Carpenter, Tian Tao, Petr Malat, Jon Hunter, linux-kernel
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>
---
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 153229198947..0a0fca737d43 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
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] mtd: core: clear out unregistered devices a bit more
2021-10-15 18:50 [PATCH] mtd: core: clear out unregistered devices a bit more Zev Weiss
@ 2021-11-19 18:48 ` Miquel Raynal
0 siblings, 0 replies; 2+ messages in thread
From: Miquel Raynal @ 2021-11-19 18:48 UTC (permalink / raw)
To: Zev Weiss, linux-mtd
Cc: Miquel Raynal, Richard Weinberger, Vignesh Raghavendra,
Michael Walle, Zhen Lei, Lee Jones, Dan Carpenter, Tian Tao,
Petr Malat, Jon Hunter, linux-kernel
On Fri, 2021-10-15 at 18:50:48 UTC, Zev Weiss wrote:
> 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>
Applied to https://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux.git mtd/next, thanks.
Miquel
^ permalink raw reply [flat|nested] 2+ messages in thread
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