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usb: typec: ucsi: Fix role swapping

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commit eb5d7ff3cf upstream.

All attempts to swap the roles timed out because the
completion was done without releasing the port lock. Fixing
that by releasing the lock before starting to wait for the
completion.

Link: https://lore.kernel.org/linux-usb/037de7ac-e210-bdf5-ec7a-8c0c88a0be20@gmail.com/
Fixes: ad74b8649b ("usb: typec: ucsi: Preliminary support for alternate modes")
Cc: stable@vger.kernel.org
Reported-and-tested-by: Jia-Ju Bai <baijiaju1990@gmail.com>
Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Link: https://lore.kernel.org/r/20220405134824.68067-3-heikki.krogerus@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Heikki Krogerus
2022-04-05 16:48:24 +03:00
committed by Greg Kroah-Hartman
parent 0366beb402
commit 324e67c3b2
1 changed files with 13 additions and 7 deletions
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20
drivers/usb/typec/ucsi/ucsi.c
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@@ -748,14 +748,18 @@ ucsi_dr_swap(const struct typec_capability *cap, enum typec_data_role role)
if (ret < 0)
goto out_unlock;
mutex_unlock(&con->lock);
if (!wait_for_completion_timeout(&con->complete,
msecs_to_jiffies(UCSI_SWAP_TIMEOUT_MS)))
ret = -ETIMEDOUT;
msecs_to_jiffies(UCSI_SWAP_TIMEOUT_MS)))
return -ETIMEDOUT;
return 0;
out_unlock:
mutex_unlock(&con->lock);
return ret < 0 ? ret : 0;
return ret;
}
static int
@@ -780,11 +784,13 @@ ucsi_pr_swap(const struct typec_capability *cap, enum typec_role role)
if (ret < 0)
goto out_unlock;
mutex_unlock(&con->lock);
if (!wait_for_completion_timeout(&con->complete,
msecs_to_jiffies(UCSI_SWAP_TIMEOUT_MS))) {
ret = -ETIMEDOUT;
goto out_unlock;
}
msecs_to_jiffies(UCSI_SWAP_TIMEOUT_MS)))
return -ETIMEDOUT;
mutex_lock(&con->lock);
/* Something has gone wrong while swapping the role */
if (con->status.pwr_op_mode != UCSI_CONSTAT_PWR_OPMODE_PD) {