From 08f94352e8d09f7db07b4e894b3c223ee92df5ad Mon Sep 17 00:00:00 2001 From: Johan Hovold Date: Fri, 27 May 2016 17:26:39 +0200 Subject: [PATCH] greybus: control: add error message to mode-switch helper Print an informative error message in case sending the mode-switch request fails. Signed-off-by: Johan Hovold Signed-off-by: Greg Kroah-Hartman --- drivers/staging/greybus/control.c | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) diff --git a/drivers/staging/greybus/control.c b/drivers/staging/greybus/control.c index c5cdf3c8ccf8..3e02bbb5abfe 100644 --- a/drivers/staging/greybus/control.c +++ b/drivers/staging/greybus/control.c @@ -163,9 +163,18 @@ int gb_control_disconnecting_operation(struct gb_control *control, int gb_control_mode_switch_operation(struct gb_control *control) { - return gb_operation_unidirectional(control->connection, + int ret; + + ret = gb_operation_unidirectional(control->connection, GB_CONTROL_TYPE_MODE_SWITCH, NULL, 0); + if (ret) { + dev_err(&control->dev, "failed to send mode switch: %d\n", + ret); + return ret; + } + + return 0; } int gb_control_timesync_enable(struct gb_control *control, u8 count, -- 2.39.2