diff mbox

[net-next,v4] r8169: fix invalid register dump

Message ID 1377119831-29691-1-git-send-email-lekensteyn@gmail.com
State Accepted, archived
Delegated to: David Miller
Headers show

Commit Message

Peter Wu Aug. 21, 2013, 9:17 p.m. UTC 
For some reason, my PCIe RTL8111E onboard NIC on a GA-Z68X-UD3H-B3
motherboard reads as FFs when reading from MMIO with a block size
larger than 7. Therefore change to reading blocks of four bytes.

Ben Hutchings noted that the buffer is large enough to hold all
registers, so now all registers are read.

Signed-off-by: Peter Wu <lekensteyn@gmail.com>
Acked-by: Francois Romieu <romieu@fr.zoreil.com>
---
 drivers/net/ethernet/realtek/r8169.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

Comments

David Miller Aug. 22, 2013, 9:26 p.m. UTC | #1 
From: Peter Wu <lekensteyn@gmail.com>
Date: Wed, 21 Aug 2013 23:17:11 +0200

> For some reason, my PCIe RTL8111E onboard NIC on a GA-Z68X-UD3H-B3
> motherboard reads as FFs when reading from MMIO with a block size
> larger than 7. Therefore change to reading blocks of four bytes.
> 
> Ben Hutchings noted that the buffer is large enough to hold all
> registers, so now all registers are read.
> 
> Signed-off-by: Peter Wu <lekensteyn@gmail.com>
> Acked-by: Francois Romieu <romieu@fr.zoreil.com>

Applied, thanks.
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diff mbox

Patch

diff --git a/drivers/net/ethernet/realtek/r8169.c b/drivers/net/ethernet/realtek/r8169.c
index 93ee49d..c0c9e14 100644
--- a/drivers/net/ethernet/realtek/r8169.c
+++ b/drivers/net/ethernet/realtek/r8169.c
@@ -1897,9 +1897,13 @@  static void rtl8169_get_regs(struct net_device *dev, struct ethtool_regs *regs,
 			     void *p)
 {
 	struct rtl8169_private *tp = netdev_priv(dev);
+	u32 __iomem *data = tp->mmio_addr;
+	u32 *dw = p;
+	int i;
 
 	rtl_lock_work(tp);
-	memcpy_fromio(p, tp->mmio_addr, regs->len);
+	for (i = 0; i < R8169_REGS_SIZE; i += 4)
+		memcpy_fromio(dw++, data++, 4);
 	rtl_unlock_work(tp);
 }