Hello Scott,
Scott Wood wrote:
> Heiko Schocher wrote:
>> diff --git a/drivers/net/fs_enet/fs_enet-main.c
>> b/drivers/net/fs_enet/fs_enet-main.c
>> index f2a4d39..f432a18 100644
>> --- a/drivers/net/fs_enet/fs_enet-main.c
>> +++ b/drivers/net/fs_enet/fs_enet-main.c
>> @@ -810,6 +810,10 @@ static int fs_enet_open(struct net_device *dev)
>> if (fep->fpi->use_napi)
>> napi_enable(&fep->napi);
>>
>> + /* to initialize the fep->cur_rx,... */
>> + /* not doing this, will cause a crash in fs_enet_rx_napi */
>> + fs_init_bds(fep->ndev);
>
> We should do this just before napi_enable() rather than just after, to
> eliminate any chance of a race window.
Yes, you are right.
Here is the new patch:
>From 3b8db4261199f0115d8e0188b6bffbc9f5e7673d Mon Sep 17 00:00:00 2001
From: Heiko Schocher <[EMAIL PROTECTED]>
Date: Thu, 10 Jan 2008 19:28:18 +0100
Subject: [PATCH] [POWERPC] Fix Ethernet over SCC on a CPM2,
also Fix crash in fs_enet_rx_napi()
Signed-off-by: Heiko Schocher <[EMAIL PROTECTED]>
---
drivers/net/fs_enet/fs_enet-main.c | 10 +++++++++-
drivers/net/fs_enet/mac-scc.c | 8 +++++++-
include/asm-powerpc/cpm2.h | 5 +++++
3 files changed, 21 insertions(+), 2 deletions(-)
diff --git a/drivers/net/fs_enet/fs_enet-main.c
b/drivers/net/fs_enet/fs_enet-main.c
index f2a4d39..70a0319 100644
--- a/drivers/net/fs_enet/fs_enet-main.c
+++ b/drivers/net/fs_enet/fs_enet-main.c
@@ -807,6 +807,10 @@ static int fs_enet_open(struct net_device *dev)
int r;
int err;
+ /* to initialize the fep->cur_rx,... */
+ /* not doing this, will cause a crash in fs_enet_rx_napi */
+ fs_init_bds(fep->ndev);
+
if (fep->fpi->use_napi)
napi_enable(&fep->napi);
@@ -982,6 +986,7 @@ static struct net_device *fs_init_instance(struct device
*dev,
fep = netdev_priv(ndev);
fep->dev = dev;
+ fep->ndev = ndev;
dev_set_drvdata(dev, ndev);
fep->fpi = fpi;
if (fpi->init_ioports)
@@ -1085,7 +1090,6 @@ static struct net_device *fs_init_instance(struct device
*dev,
}
registered = 1;
-
return ndev;
err:
@@ -1347,6 +1351,10 @@ static struct of_device_id fs_enet_match[] = {
.compatible = "fsl,cpm1-scc-enet",
.data = (void *)&fs_scc_ops,
},
+ {
+ .compatible = "fsl,cpm2-scc-enet",
+ .data = (void *)&fs_scc_ops,
+ },
#endif
#ifdef CONFIG_FS_ENET_HAS_FCC
{
diff --git a/drivers/net/fs_enet/mac-scc.c b/drivers/net/fs_enet/mac-scc.c
index fe3d8a6..3889271 100644
--- a/drivers/net/fs_enet/mac-scc.c
+++ b/drivers/net/fs_enet/mac-scc.c
@@ -50,7 +50,6 @@
#include "fs_enet.h"
/*************************************************/
-
#if defined(CONFIG_CPM1)
/* for a 8xx __raw_xxx's are sufficient */
#define __fs_out32(addr, x) __raw_writel(x, addr)
@@ -65,6 +64,8 @@
#define __fs_out16(addr, x) out_be16(addr, x)
#define __fs_in32(addr) in_be32(addr)
#define __fs_in16(addr) in_be16(addr)
+#define __fs_out8(addr, x) out_8(addr, x)
+#define __fs_in8(addr) in_8(addr)
#endif
/* write, read, set bits, clear bits */
@@ -297,8 +298,13 @@ static void restart(struct net_device *dev)
/* Initialize function code registers for big-endian.
*/
+#ifndef CONFIG_NOT_COHERENT_CACHE
+ W8(ep, sen_genscc.scc_rfcr, SCC_EB | SCC_GBL);
+ W8(ep, sen_genscc.scc_tfcr, SCC_EB | SCC_GBL);
+#else
W8(ep, sen_genscc.scc_rfcr, SCC_EB);
W8(ep, sen_genscc.scc_tfcr, SCC_EB);
+#endif
/* Set maximum bytes per receive buffer.
* This appears to be an Ethernet frame size, not the buffer
diff --git a/include/asm-powerpc/cpm2.h b/include/asm-powerpc/cpm2.h
index f1112c1..14c6496 100644
--- a/include/asm-powerpc/cpm2.h
+++ b/include/asm-powerpc/cpm2.h
@@ -375,6 +375,11 @@ typedef struct scc_param {
uint scc_tcrc; /* Internal */
} sccp_t;
+/* Function code bits.
+*/
+#define SCC_EB ((u_char) 0x10) /* Set big endian byte order */
+#define SCC_GBL ((u_char) 0x20) /* Snooping enabled */
+
/* CPM Ethernet through SCC1.
*/
typedef struct scc_enet {
--
1.5.2.2
bye,
Heiko
--
DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
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