]> git.ipfire.org Git - thirdparty/kernel/stable.git/commit
Merge patch series "mei: connect to card in D3cold"
authorGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Thu, 18 Sep 2025 16:29:34 +0000 (18:29 +0200)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Thu, 18 Sep 2025 16:29:34 +0000 (18:29 +0200)
commit55f6ac4484b342e62640ee4135ab1f1ffbcd5be5
treef53421ecf32a59e0d0b5001f65f71c14f99471e7
parent68be6c432cfa84abe908668b0d5c26060f2fe589
parentf9deb462d52e71e12f339a43b10f4443287e1f08
Merge patch series "mei: connect to card in D3cold"

Alexander Usyskin <alexander.usyskin@intel.com> says:

When discrete graphic card enters D3cold th CSC engine is powered down.

On wakeup from the D3cold full HECI link reset is required.  The driver
should detect that firmware requests link reset and initiate the link
reset flow.

In the usual flow the connect IOCTL will trigger the wake from D3cold
and corresponding link reset.  The MEI driver invalidates all open
handles on link reset including the one that triggered the wake
rendering this connection unusable.  To break this loop make connect
detect that it is interrupted by link reset and retry connect attempt
after reset was completed.

Link: https://lore.kernel.org/r/20250918130435.3327400-1-alexander.usyskin@intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/misc/mei/main.c