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greybus: control: add error message to mode-switch helper

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Print an informative error message in case sending the mode-switch
request fails.

Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
This commit is contained in:
Johan Hovold 2016-05-27 17:26:39 +02:00 committed by Greg Kroah-Hartman
parent e3fbe48432
commit 08f94352e8
1 changed files with 10 additions and 1 deletions
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11
drivers/staging/greybus/control.c
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@ -163,9 +163,18 @@ int gb_control_disconnecting_operation(struct gb_control *control,
int gb_control_mode_switch_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, GB_CONTROL_TYPE_MODE_SWITCH,
NULL, 0); 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, int gb_control_timesync_enable(struct gb_control *control, u8 count,