libertas: EHS_REMOVE_WAKEUP is not always supported

Certain firmware versions, particularly the 8388 found on the XO-1,
do not support the EHS_REMOVE_WAKEUP command that is used to disable
WOL. Sending this command to the card will return a failure that
would get propagated up the stack and cause suspend to fail.

Instead, fall back to an all-zero wakeup mask.

This fixes http://dev.laptop.org/ticket/9967

Signed-off-by: Deepak Saxena <dsaxena@laptop.org>
Signed-off-by: Daniel Drake <dsd@laptop.org>
[includes fixups by Paul Fox]
Signed-off-by: John W. Linville <linville@tuxdriver.com>

4 files changed, 18 insertions, 1 deletions

diff --git a/drivers/net/wireless/libertas/cmd.c b/drivers/net/wireless/libertas/cmd.c
index 70745928f3f8..78c4da150a74 100644
--- a/drivers/net/wireless/libertas/cmd.c
+++ b/drivers/net/wireless/libertas/cmd.c
@@ -177,6 +177,14 @@ int lbs_host_sleep_cfg(struct lbs_private *priv, uint32_t criteria,
         struct cmd_ds_host_sleep cmd_config;
         int ret;
 
+        /*
+         * Certain firmware versions do not support EHS_REMOVE_WAKEUP command
+         * and the card will return a failure.  Since we need to be
+         * able to reset the mask, in those cases we set a 0 mask instead.
+         */
+        if (criteria == EHS_REMOVE_WAKEUP && !priv->ehs_remove_supported)
+                criteria = 0;
+
         cmd_config.hdr.size = cpu_to_le16(sizeof(cmd_config));
         cmd_config.criteria = cpu_to_le32(criteria);
         cmd_config.gpio = priv->wol_gpio;
diff --git a/drivers/net/wireless/libertas/dev.h b/drivers/net/wireless/libertas/dev.h
index f062ed583901..f5a9851fc7ee 100644
--- a/drivers/net/wireless/libertas/dev.h
+++ b/drivers/net/wireless/libertas/dev.h
@@ -137,6 +137,7 @@ struct lbs_private {
         uint32_t wol_criteria;
         uint8_t wol_gpio;
         uint8_t wol_gap;
+        bool ehs_remove_supported;
 
         /* Transmitting */
         int tx_pending_len;             /* -1 while building packet */
diff --git a/drivers/net/wireless/libertas/if_usb.c b/drivers/net/wireless/libertas/if_usb.c
index 35931cf4d6db..6524c70363d9 100644
--- a/drivers/net/wireless/libertas/if_usb.c
+++ b/drivers/net/wireless/libertas/if_usb.c
@@ -345,6 +345,13 @@ static int if_usb_probe(struct usb_interface *intf,
         if (device_create_file(&priv->dev->dev, &dev_attr_lbs_flash_boot2))
                 lbs_pr_err("cannot register lbs_flash_boot2 attribute\n");
 
+        /*
+         * EHS_REMOVE_WAKEUP is not supported on all versions of the firmware.
+         */
+        priv->wol_criteria = EHS_REMOVE_WAKEUP;
+        if (lbs_host_sleep_cfg(priv, priv->wol_criteria, NULL))
+                priv->ehs_remove_supported = false;
+
         return 0;
 
 err_start_card:
diff --git a/drivers/net/wireless/libertas/main.c b/drivers/net/wireless/libertas/main.c
index 47ce5a6ba120..6d7af91d52c2 100644
--- a/drivers/net/wireless/libertas/main.c
+++ b/drivers/net/wireless/libertas/main.c
@@ -844,9 +844,10 @@ struct lbs_private *lbs_add_card(void *card, struct device *dmdev)
         priv->work_thread = create_singlethread_workqueue("lbs_worker");
         INIT_WORK(&priv->mcast_work, lbs_set_mcast_worker);
 
-        priv->wol_criteria = 0xffffffff;
+        priv->wol_criteria = EHS_REMOVE_WAKEUP;
         priv->wol_gpio = 0xff;
         priv->wol_gap = 20;
+        priv->ehs_remove_supported = true;
 
         goto done;