libertas: set mac control synchronously during init

CMD_MAC_CONTROL is currently sent async to the firmware, and is sent
from the lbs_setup_firmware() path during device init.

This means that device init can complete with commands pending, and
the if_sdio driver will sometimes power down the device (after init)
with this command still pending.

This was causing an occasional spurious command timeout after init,
leading to a device reset.

Fix this by making CMD_MAC_CONTROL synchronous when called from the
lbs_setup_firmware() path.

Signed-off-by: Daniel Drake <dsd@laptop.org>
Signed-off-by: Dan Williams <dcbw@redhat.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 16 insertions, 0 deletions

diff --git a/drivers/net/wireless/libertas/cmd.c b/drivers/net/wireless/libertas/cmd.c
index 26e68326710b..aaa297315c47 100644
--- a/drivers/net/wireless/libertas/cmd.c
+++ b/drivers/net/wireless/libertas/cmd.c
@@ -1159,6 +1159,22 @@ void lbs_set_mac_control(struct lbs_private *priv)
 	lbs_deb_leave(LBS_DEB_CMD);
 }
 
+int lbs_set_mac_control_sync(struct lbs_private *priv)
+{
+	struct cmd_ds_mac_control cmd;
+	int ret = 0;
+
+	lbs_deb_enter(LBS_DEB_CMD);
+
+	cmd.hdr.size = cpu_to_le16(sizeof(cmd));
+	cmd.action = cpu_to_le16(priv->mac_control);
+	cmd.reserved = 0;
+	ret = lbs_cmd_with_response(priv, CMD_MAC_CONTROL, &cmd);
+
+	lbs_deb_leave(LBS_DEB_CMD);
+	return ret;
+}
+
 /**
  *  lbs_allocate_cmd_buffer - allocates the command buffer and links
  *  it to command free queue