treewide: fix replace nbd@openwrt.org with nbd@nbd.name
[openwrt.org/openwrt.git] / target / linux / generic / patches-3.18 / 077-09-bgmac-increase-rx-ring-size-from-511-to-512.patch
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From: Felix Fietkau <nbd@nbd.name>
Date: Sun, 12 Apr 2015 22:36:16 +0200
Subject: [PATCH] bgmac: increase rx ring size from 511 to 512
 
Limiting it to 511 looks like a failed attempt at leaving one descriptor
empty to allow the hardware to stop processing a buffer that has not
been prepared yet. However, this doesn't work because this affects the
total ring size as well
 
Signed-off-by: Felix Fietkau <nbd@nbd.name>
---
 
--- a/drivers/net/ethernet/broadcom/bgmac.h
+++ b/drivers/net/ethernet/broadcom/bgmac.h
@@ -356,7 +356,7 @@
 #define BGMAC_MAX_RX_RINGS                     1
 
 #define BGMAC_TX_RING_SLOTS                    128
-#define BGMAC_RX_RING_SLOTS                    512 - 1         /* Why -1? Well, Broadcom does that... */
+#define BGMAC_RX_RING_SLOTS                    512
 
 #define BGMAC_RX_HEADER_LEN                    28              /* Last 24 bytes are unused. Well... */
 #define BGMAC_RX_FRAME_OFFSET                  30              /* There are 2 unused bytes between header and real data */
 
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