target/linux/mpc83xx/patches-3.7/111-etsec27_war.patch


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--- a/drivers/net/ethernet/freescale/gianfar.c
+++ b/drivers/net/ethernet/freescale/gianfar.c
@@ -1009,7 +1009,16 @@ static int gfar_probe(struct platform_de
 	/* We need to delay at least 3 TX clocks */
 	udelay(2);
 
-	tempval = (MACCFG1_TX_FLOW | MACCFG1_RX_FLOW);
+	if ((mfspr(SPRN_SVR) & 0xffff) >= 0x0011) {
+		tempval = (MACCFG1_TX_FLOW | MACCFG1_RX_FLOW);
+	} else {
+		/*
+		 * Do not enable flow control on chips earlier than rev 1.1,
+		 * because of the eTSEC27 erratum
+		 */
+		tempval = 0;
+	}
+
 	gfar_write(&regs->maccfg1, tempval);
 
 	/* Initialize MACCFG2. */