libertas: Move actual transmission to main thread

The locking issues with TX, especially TX from multiple netdevs, get
_so_ much easier if you do it like this.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 4 insertions, 1 deletions

diff --git a/drivers/net/wireless/libertas/dev.h b/drivers/net/wireless/libertas/dev.h
index 04cf33da5899..468140512a66 100644
--- a/drivers/net/wireless/libertas/dev.h
+++ b/drivers/net/wireless/libertas/dev.h
@@ -164,7 +164,10 @@ struct lbs_private {
 
         struct mutex lock;
 
-        u8 tmptxbuf[LBS_UPLD_SIZE];
+        /* TX packet ready to be sent... */
+        int tx_pending_len;             /* -1 while building packet */
+
+        u8 tx_pending_buf[LBS_UPLD_SIZE];
         /* protected by hard_start_xmit serialization */
 
         /** command-related variables */