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| author | Heikki Krogerus <heikki.krogerus@linux.intel.com> | 2024-05-07 16:43:16 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-05-25 17:17:18 +0300 |
| commit | 6b40d4c2620966e014157cbb3fae695a6d7dd223 (patch) | |
| tree | bc4d79038ecd9534b9265b38429b959ed023fab2 /fs/squashfs/dir.c | |
| parent | 467139546f3fb93913de064461b1a43a212d7626 (diff) | |
| download | linux-6b40d4c2620966e014157cbb3fae695a6d7dd223.tar.xz | |
usb: typec: ucsi: displayport: Fix potential deadlock
commit b791a67f68121d69108640d4a3e591d210ffe850 upstream.
The function ucsi_displayport_work() does not access the
connector, so it also must not acquire the connector lock.
This fixes a potential deadlock scenario:
ucsi_displayport_work() -> lock(&con->lock)
typec_altmode_vdm()
dp_altmode_vdm()
dp_altmode_work()
typec_altmode_enter()
ucsi_displayport_enter() -> lock(&con->lock)
Reported-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Fixes: af8622f6a585 ("usb: typec: ucsi: Support for DisplayPort alt mode")
Cc: stable@vger.kernel.org
Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Link: https://lore.kernel.org/r/20240507134316.161999-1-heikki.krogerus@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs/squashfs/dir.c')
0 files changed, 0 insertions, 0 deletions