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| author | Heikki Krogerus <heikki.krogerus@linux.intel.com> | 2023-01-31 16:15:18 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-02-02 11:27:28 +0100 |
| commit | f82060da749c611ed427523b6d1605d87338aac1 (patch) | |
| tree | 427e9d3a880975e3dad0b926fea1da042ab8cab8 /drivers/usb/typec/ucsi/ucsi.c | |
| parent | 30d09b3131f5b1b9d54ad9b7ee171a45e21362b3 (diff) | |
| download | linux-f82060da749c611ed427523b6d1605d87338aac1.tar.gz linux-f82060da749c611ed427523b6d1605d87338aac1.tar.bz2 linux-f82060da749c611ed427523b6d1605d87338aac1.zip | |
usb: typec: ucsi: Don't attempt to resume the ports before they exist
This will fix null pointer dereference that was caused by
the driver attempting to resume ports that were not yet
registered.
Fixes: e0dced9c7d47 ("usb: typec: ucsi: Resume in separate work")
Cc: <stable@vger.kernel.org>
Link: https://bugzilla.kernel.org/show_bug.cgi?id=216697
Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Link: https://lore.kernel.org/r/20230131141518.78215-1-heikki.krogerus@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/typec/ucsi/ucsi.c')
| -rw-r--r-- | drivers/usb/typec/ucsi/ucsi.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/drivers/usb/typec/ucsi/ucsi.c b/drivers/usb/typec/ucsi/ucsi.c index 1292241d581a..1cf8947c6d66 100644 --- a/drivers/usb/typec/ucsi/ucsi.c +++ b/drivers/usb/typec/ucsi/ucsi.c @@ -1269,6 +1269,9 @@ err_unregister: con->port = NULL; } + kfree(ucsi->connector); + ucsi->connector = NULL; + err_reset: memset(&ucsi->cap, 0, sizeof(ucsi->cap)); ucsi_reset_ppm(ucsi); @@ -1300,7 +1303,8 @@ static void ucsi_resume_work(struct work_struct *work) int ucsi_resume(struct ucsi *ucsi) { - queue_work(system_long_wq, &ucsi->resume_work); + if (ucsi->connector) + queue_work(system_long_wq, &ucsi->resume_work); return 0; } EXPORT_SYMBOL_GPL(ucsi_resume); @@ -1420,6 +1424,9 @@ void ucsi_unregister(struct ucsi *ucsi) /* Disable notifications */ ucsi->ops->async_write(ucsi, UCSI_CONTROL, &cmd, sizeof(cmd)); + if (!ucsi->connector) + return; + for (i = 0; i < ucsi->cap.num_connectors; i++) { cancel_work_sync(&ucsi->connector[i].work); ucsi_unregister_partner(&ucsi->connector[i]); |