mwifiex: fix cmd_skb headroom decreasing issue

Before calling host_to_card() to send the cmd to firmware,
we use skb_push() to add 4 bytes SDIO interface header at
the start of the data buffer. Since cmd_skb data structure
will be re-used at a later time, we need to restore its
headroom by removing the 4 bytes header.

Signed-off-by: Bing Zhao <bzhao@marvell.com>
Signed-off-by: Marc Yang <yangyang@marvell.com>
Signed-off-by: Yogesh Ashok Powar <yogeshp@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/drivers/net/wireless/mwifiex/cmdevt.c b/drivers/net/wireless/mwifiex/cmdevt.c
index a9aeb31..8676480 100644 (file)
--- a/drivers/net/wireless/mwifiex/cmdevt.c
+++ b/drivers/net/wireless/mwifiex/cmdevt.c
@@ -206,6 +206,8 @@ static int mwifiex_dnld_cmd_to_fw(struct mwifiex_private *priv,
                                             cmd_node->cmd_skb->data,
                                             cmd_node->cmd_skb->len, NULL);
 
+       skb_pull(cmd_node->cmd_skb, INTF_HEADER_LEN);
+
        if (ret == -1) {
                dev_err(adapter->dev, "DNLD_CMD: host to card failed\n");
                if (wait_queue)