isdn/gigaset: avoid copying AT commands twice

Change the Gigaset driver's internal write_cmd interface to accept a
cmdbuf structure instead of a string. This avoids copying formatted
AT commands a second time.

Impact: optimization
Signed-off-by: Tilman Schmidt <tilman@imap.cc>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 1 insertions, 3 deletions

diff --git a/drivers/isdn/gigaset/gigaset.h b/drivers/isdn/gigaset/gigaset.h
index 8738b0821fc9..904c9473effc 100644
--- a/drivers/isdn/gigaset/gigaset.h
+++ b/drivers/isdn/gigaset/gigaset.h
@@ -574,9 +574,7 @@ struct bas_bc_state {
 struct gigaset_ops {
         /* Called from ev-layer.c/interface.c for sending AT commands to the
            device */
-        int (*write_cmd)(struct cardstate *cs,
-                         const unsigned char *buf, int len,
-                         struct tasklet_struct *wake_tasklet);
+        int (*write_cmd)(struct cardstate *cs, struct cmdbuf_t *cb);
 
         /* Called from interface.c for additional device control */
         int (*write_room)(struct cardstate *cs);