Re: [PATCH v6.6] drm/amd/display: Wake DMCUB before executing GPINT commands

[Greg KH <gregkh@linuxfoundation.org>]

On Tue, Apr 16, 2024 at 03:52:40AM +0000, Zhu Wang wrote:
> From: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
> 
> stable inclusion
> from stable-v6.7.3
> commit 2ef98c6d753a744e333b7e34b9cf687040fba57d
> category: bugfix
> bugzilla: https://gitee.com/src-openeuler/kernel/issues/I9BV4C
> CVE: CVE-2023-52624
> 
> Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=2ef98c6d753a744e333b7e34b9cf687040fba57d
> 
> --------------------------------
> 
> [ Upstream commit e5ffd1263dd5b44929c676171802e7b6af483f21 ]
> 
> [Why]
> DMCUB can be in idle when we attempt to interface with the HW through
> the GPINT mailbox resulting in a system hang.
> 
> [How]
> Add dc_wake_and_execute_gpint() to wrap the wake, execute, sleep
> sequence.
> 
> If the GPINT executes successfully then DMCUB will be put back into
> sleep after the optional response is returned.
> 
> It functions similar to the inbox command interface.
> 
> Cc: Mario Limonciello <mario.limonciello@amd.com>
> Cc: Alex Deucher <alexander.deucher@amd.com>
> Cc: stable@vger.kernel.org
> Reviewed-by: Hansen Dsouza <hansen.dsouza@amd.com>
> Acked-by: Wayne Lin <wayne.lin@amd.com>
> Signed-off-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
> Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
> 
> This commit comes from following commits:
> 
>  8774029f76b9 ("drm/amd/display: Add DCN35 CLK_MGR")
>  65138eb72e1f ("drm/amd/display: Add DCN35 DMUB")
>  dc01c4b79bfe ("drm/amd/display: Update driver and IPS interop")
>  820c3870c491 ("drm/amd/display: Refactor DMCUB enter/exit idle interface")
>  2ef98c6d753a ("drm/amd/display: Wake DMCUB before executing GPINT commands")

Why are you putting multiple commits together and not just submitting
the individual ones?  And what is this for?

confused,

greg k-h