On Sun, 27 Sep 2026 19:47:36 +0800 Jiale Yao <[email protected]> wrote:
> The dynamic device-dax probe path publishes its devm-allocated pgmap
> before several operations that can still fail. If one of them fails,
> devres frees the pgmap while dev_dax->pgmap remains non-NULL. A later
> bind then fails the dynamic-dax invariant check and leaves the device
> unusable until its region is recreated.
>
> Defer assigning dev_dax->pgmap until the final devm action has been
> installed and probe can no longer fail. A failed probe then never
> publishes the temporary pgmap.
lgtm, thanks.
> Fixes: fc65c4eb0b2a ("device-dax: ensure dev_dax->pgmap is valid for dynamic
> devices")
> Cc: [email protected]
> Signed-off-by: Jiale Yao <[email protected]>
I'll queue this for next-merge-window as it doesn't seem very urgent.
Retaining cc:stable. I've marked it as "needs maintainer acks".
