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Date: Mon, 7 Jun 2021 16:14:37 +0300 From: Heikki Krogerus <heikki.krogerus@...ux.intel.com> To: Benjamin Berg <bberg@...hat.com> Cc: linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org Subject: [RFC PATCH 2/7] usb: typec: ucsi: Don't stop alt mode registration on busy condition If the PPM tells it's busy, we can now simply try again. Signed-off-by: Heikki Krogerus <heikki.krogerus@...ux.intel.com> --- drivers/usb/typec/ucsi/ucsi.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/usb/typec/ucsi/ucsi.c b/drivers/usb/typec/ucsi/ucsi.c index 366c8a468bc18..a8e0e31dcddf5 100644 --- a/drivers/usb/typec/ucsi/ucsi.c +++ b/drivers/usb/typec/ucsi/ucsi.c @@ -437,8 +437,11 @@ static int ucsi_register_altmodes(struct ucsi_connector *con, u8 recipient) command |= UCSI_GET_ALTMODE_CONNECTOR_NUMBER(con->num); command |= UCSI_GET_ALTMODE_OFFSET(i); len = ucsi_send_command(con->ucsi, command, alt, sizeof(alt)); - if (len <= 0) + if (len <= 0) { + if (len == -EBUSY) + continue; return len; + } /* * This code is requesting one alt mode at a time, but some PPMs -- 2.30.2
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