diff options
| author | Andrei Kuchynski <akuchynski@chromium.org> | 2025-04-24 08:44:28 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-05-22 14:29:53 +0200 |
| commit | 5924b324468845fc795bd76f588f51d7ab4f202d (patch) | |
| tree | 15592cfc9bffaba1bafcac5bf257e12b6084e713 /drivers/usb/cdns3/cdns3-debug.h | |
| parent | bca94cc345633e29ad61a7f1ade0bd035bd7d1f7 (diff) | |
usb: typec: ucsi: displayport: Fix deadlock
commit 364618c89d4c57c85e5fc51a2446cd939bf57802 upstream.
This patch introduces the ucsi_con_mutex_lock / ucsi_con_mutex_unlock
functions to the UCSI driver. ucsi_con_mutex_lock ensures the connector
mutex is only locked if a connection is established and the partner pointer
is valid. This resolves a deadlock scenario where
ucsi_displayport_remove_partner holds con->mutex waiting for
dp_altmode_work to complete while dp_altmode_work attempts to acquire it.
Cc: stable <stable@kernel.org>
Fixes: af8622f6a585 ("usb: typec: ucsi: Support for DisplayPort alt mode")
Signed-off-by: Andrei Kuchynski <akuchynski@chromium.org>
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Link: https://lore.kernel.org/r/20250424084429.3220757-2-akuchynski@chromium.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/cdns3/cdns3-debug.h')
0 files changed, 0 insertions, 0 deletions