Bluetooth: EWS: extended window size option support

Adds support for extended window size (EWS) config option. We enable EWS
feature in L2CAP Info RSP when hs enabled. EWS option is included in L2CAP
Config Req if tx_win (which is set via socket) bigger then standard default
value (63) && hs enabled && remote side supports EWS feature.

Using EWS selects extended control field in L2CAP.

Code partly based on Qualcomm and Atheros patches sent upstream a year ago.

Signed-off-by: Andrei Emeltchenko <andrei.emeltchenko@intel.com>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>

1 files changed, 4 insertions, 4 deletions

diff --git a/net/bluetooth/l2cap_sock.c b/net/bluetooth/l2cap_sock.c
index 48ad8ba492a5..836d12e66a38 100644
--- a/net/bluetooth/l2cap_sock.c
+++ b/net/bluetooth/l2cap_sock.c
@@ -331,7 +331,7 @@ static int l2cap_sock_getsockopt_old(struct socket *sock, int optname, char __us
                 opts.mode     = chan->mode;
                 opts.fcs      = chan->fcs;
                 opts.max_tx   = chan->max_tx;
-                opts.txwin_size = (__u16)chan->tx_win;
+                opts.txwin_size = chan->tx_win;
 
                 len = min_t(unsigned int, len, sizeof(opts));
                 if (copy_to_user(optval, (char *) &opts, len))
@@ -501,7 +501,7 @@ static int l2cap_sock_setsockopt_old(struct socket *sock, int optname, char __us
                 opts.mode     = chan->mode;
                 opts.fcs      = chan->fcs;
                 opts.max_tx   = chan->max_tx;
-                opts.txwin_size = (__u16)chan->tx_win;
+                opts.txwin_size = chan->tx_win;
 
                 len = min_t(unsigned int, sizeof(opts), optlen);
                 if (copy_from_user((char *) &opts, optval, len)) {
@@ -509,7 +509,7 @@ static int l2cap_sock_setsockopt_old(struct socket *sock, int optname, char __us
                         break;
                 }
 
-                if (opts.txwin_size > L2CAP_DEFAULT_TX_WINDOW) {
+                if (opts.txwin_size > L2CAP_DEFAULT_EXT_WINDOW) {
                         err = -EINVAL;
                         break;
                 }
@@ -533,7 +533,7 @@ static int l2cap_sock_setsockopt_old(struct socket *sock, int optname, char __us
                 chan->omtu = opts.omtu;
                 chan->fcs  = opts.fcs;
                 chan->max_tx = opts.max_tx;
-                chan->tx_win = (__u8)opts.txwin_size;
+                chan->tx_win = opts.txwin_size;
                 break;
 
         case L2CAP_LM: