cxgb3 - Update rx coalescing length

From: Divy Le Ray <[email protected]>

Reduce Rx coalescing length to 12288
Large bursts from the adapter to the host create back pressure on the chip. Reducing the burst size avoids the issue.

---

 drivers/net/cxgb3/common.h |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

index c46c249..55922ed 100644
@@ -104,7 +104,7 @@ enum {
 	PROTO_SRAM_LINES = 128, /* size of TP sram */
 };
 
-#define MAX_RX_COALESCING_LEN 16224U
+#define MAX_RX_COALESCING_LEN 12288U
 
 enum {
 	PAUSE_RX = 1 << 0,