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| author | Andrei Kuchynski <[email protected]> | 2025-04-24 08:44:28 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <[email protected]> | 2025-05-01 15:40:01 +0000 |
| commit | 364618c89d4c57c85e5fc51a2446cd939bf57802 (patch) | |
| tree | fde20af099fe40e11afbdc56247d186ba1f319ba /drivers/usb/cdns3/cdnsp-ring.c | |
| parent | usb: misc: onboard_usb_dev: fix support for Cypress HX3 hubs (diff) | |
| download | kernel-364618c89d4c57c85e5fc51a2446cd939bf57802.tar.gz kernel-364618c89d4c57c85e5fc51a2446cd939bf57802.zip | |
usb: typec: ucsi: displayport: Fix deadlock
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 <[email protected]>
Fixes: af8622f6a585 ("usb: typec: ucsi: Support for DisplayPort alt mode")
Signed-off-by: Andrei Kuchynski <[email protected]>
Reviewed-by: Heikki Krogerus <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>
Diffstat (limited to 'drivers/usb/cdns3/cdnsp-ring.c')
0 files changed, 0 insertions, 0 deletions