Re: [PATCH 2/2] mailbox: pcc: Serialize channel updates with shared memory teardown
Sudeep Holla <[email protected]>
| Newsgroups | org.kernel.vger.linux-acpi,org.kernel.vger.linux-kernel,org.kernel.vger.stable |
|---|---|
| Message-ID | <20260903-solid-unbiased-hog-26c0ef@sudeepholla> |
On Thu, Sep 03, 2026 at 12:13:28PM +0100, Christian Loehle wrote: > mbox_free_channel() makes a PCC channel available before the subsequent > shared-memory unmap. Without serialization, a concurrent request can bind a > new client and replace the mapping, which the old release then unmaps. > > Serialize PCC channel acquisition and release. Keep the channel unavailable > until the old shared-memory mapping has been removed. > > Suggested-by: Sudeep Holla <[email protected]> Reviewed-by: Sudeep Holla <[email protected]> -- Regards, Sudeep