mwifiex: adding check for enough space before padding
All MSDUs, except the last one in an AMSDU, should end up at 4 bytes boundary. There is need to check if enough skb_tailroom space exists before padding the skb. Also re-arranging code for better readablity. Signed-off-by: NYogesh Ashok Powar <yogeshp@marvell.com> Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>
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