aboutsummaryrefslogtreecommitdiffstats
path: root/target/linux/generic/patches-3.18/077-09-bgmac-increase-rx-ring-size-from-511-to-512.patch
blob: 1fc4ed03f1f63253827d6da09259d317b0a9b66b (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
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 */