iwlwifi: increase max tfd payload size

Increase the size of TFD_MAX_PAYLOAD_SIZE (the size of iwl_device_cmd)
to accommodate iwl6000_channel_switch_cmd data structure.

Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Acked-by: Ben Cahill <ben.m.cahill@intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 8 insertions, 3 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-dev.h b/drivers/net/wireless/iwlwifi/iwl-dev.h
index 1378654801c..b520e551f7f 100644
--- a/drivers/net/wireless/iwlwifi/iwl-dev.h
+++ b/drivers/net/wireless/iwlwifi/iwl-dev.h
@@ -364,7 +364,7 @@ enum {
         CMD_WANT_SKB = (1 << 2),
 };
 
-#define IWL_CMD_MAX_PAYLOAD 320
+#define DEF_CMD_PAYLOAD_SIZE 320
 
 /*
  * IWL_LINK_HDR_MAX should include ieee80211_hdr, radiotap header,
@@ -388,7 +388,8 @@ struct iwl_device_cmd {
                 u16 val16;
                 u32 val32;
                 struct iwl_tx_cmd tx;
-                u8 payload[IWL_CMD_MAX_PAYLOAD];
+                struct iwl6000_channel_switch_cmd chswitch;
+                u8 payload[DEF_CMD_PAYLOAD_SIZE];
         } __attribute__ ((packed)) cmd;
 } __attribute__ ((packed));
 
@@ -741,7 +742,11 @@ static inline int iwl_queue_used(const struct iwl_queue *q, int i)
 
 static inline u8 get_cmd_index(struct iwl_queue *q, u32 index, int is_huge)
 {
-        /* This is for scan command, the big buffer at end of command array */
+        /*
+         * This is for init calibration result and scan command which
+         * required buffer > TFD_MAX_PAYLOAD_SIZE,
+         * the big buffer at end of command array
+         */
         if (is_huge)
                 return q->n_window;     /* must be power of 2 */