2024-03-25 17:37:32

by Herve Codina

Subject: [PATCH v3 RESEND] driver core: Keep the supplier fwnode consistent with the device

The commit 3a2dbc510c43 ("driver core: fw_devlink: Don't purge child
fwnode's consumer links") introduces the possibility to use the
supplier's parent device instead of the supplier itself.
In that case the supplier fwnode used is not updated and is no more
consistent with the supplier device used.

Use the fwnode consistent with the supplier device when checking flags.

Fixes: 3a2dbc510c43 ("driver core: fw_devlink: Don't purge child fwnode's consumer links")
Cc: [email protected]
Signed-off-by: Herve Codina <[email protected]>
---
Changes v2 -> v3:
Do not update the supplier handle in order to keep the original handle
for debug traces.

Changes v1 -> v2:
Remove sup_handle check and related pr_debug() call as sup_handle cannot be
invalid if sup_dev is valid.

drivers/base/core.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/base/core.c b/drivers/base/core.c
index b93f3c5716ae..0d335b0dc396 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -2163,7 +2163,7 @@ static int fw_devlink_create_devlink(struct device *con,
* supplier device indefinitely.
*/
if (sup_dev->links.status == DL_DEV_NO_DRIVER &&
- sup_handle->flags & FWNODE_FLAG_INITIALIZED) {
+ sup_dev->fwnode->flags & FWNODE_FLAG_INITIALIZED) {
dev_dbg(con,
"Not linking %pfwf - dev might never probe\n",
sup_handle);
--
2.44.0

2024-03-25 21:50:39

by Saravana Kannan

Subject: Re: [PATCH v3 RESEND] driver core: Keep the supplier fwnode consistent with the device

On Mon, Mar 25, 2024 at 9:39 AM Herve Codina <[email protected]> wrote:
>
> The commit 3a2dbc510c43 ("driver core: fw_devlink: Don't purge child
> fwnode's consumer links") introduces the possibility to use the
> supplier's parent device instead of the supplier itself.
> In that case the supplier fwnode used is not updated and is no more
> consistent with the supplier device used.
>
> Use the fwnode consistent with the supplier device when checking flags.

Please drop this patch. It's unnecessary churn. fw_devlink took years
to get to where it is. There are lots of corner cases. So I'd rather
not touch something if it's not broken. If a particular case for you
is broken, start with describing the issue please and then we can
figure out if it needs a change and what's a good way to do it.

Nack.

-Saravana

>
> Fixes: 3a2dbc510c43 ("driver core: fw_devlink: Don't purge child fwnode's consumer links")
> Cc: [email protected]
> Signed-off-by: Herve Codina <[email protected]>
> ---
> Changes v2 -> v3:
> Do not update the supplier handle in order to keep the original handle
> for debug traces.
>
> Changes v1 -> v2:
> Remove sup_handle check and related pr_debug() call as sup_handle cannot be
> invalid if sup_dev is valid.
>
> drivers/base/core.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/base/core.c b/drivers/base/core.c
> index b93f3c5716ae..0d335b0dc396 100644
> --- a/drivers/base/core.c
> +++ b/drivers/base/core.c
> @@ -2163,7 +2163,7 @@ static int fw_devlink_create_devlink(struct device *con,
> * supplier device indefinitely.
> */
> if (sup_dev->links.status == DL_DEV_NO_DRIVER &&
> - sup_handle->flags & FWNODE_FLAG_INITIALIZED) {
> + sup_dev->fwnode->flags & FWNODE_FLAG_INITIALIZED) {
> dev_dbg(con,
> "Not linking %pfwf - dev might never probe\n",
> sup_handle);
> --
> 2.44.0
>