[patch for 2.6.27? 08/10] r8169: fix RxMissed register access
From: akpm@linux-foundation.org
Date: 2008-09-22 21:16:42
From: Francois Romieu <romieu@fr.zoreil.com> - the register is defined for the 8169 chipset only and there is no 8169 beyond RTL_GIGA_MAC_VER_06. - only the lower 3 bytes of the register are valid Fixes: 1. http://bugzilla.kernel.org/show_bug.cgi?id=10180 2. http://bugzilla.kernel.org/show_bug.cgi?id=11062 (bits of) Tested by Hermann Gausterer and Adam Huffman. Signed-off-by: Francois Romieu <romieu@fr.zoreil.com> Cc: Edward Hsu <redacted> Cc: Jeff Garzik <redacted> Tested-by: Ivan Vecera <ivecera@redhat.com> Cc: <stable@kernel.org> [2.6.25.x, 2.6.26.x] Signed-off-by: Andrew Morton <akpm@linux-foundation.org> --- drivers/net/r8169.c | 25 ++++++++++++++----------- 1 file changed, 14 insertions(+), 11 deletions(-) diff -puN drivers/net/r8169.c~r8169-fix-rxmissed-register-access drivers/net/r8169.c
--- a/drivers/net/r8169.c~r8169-fix-rxmissed-register-access
+++ a/drivers/net/r8169.c@@ -2286,8 +2286,6 @@ static void rtl_hw_start_8168(struct net RTL_R8(IntrMask); - RTL_W32(RxMissed, 0); - rtl_set_rx_mode(dev); RTL_W8(ChipCmd, CmdTxEnb | CmdRxEnb);
@@ -2412,8 +2410,6 @@ static void rtl_hw_start_8101(struct net RTL_R8(IntrMask); - RTL_W32(RxMissed, 0); - rtl_set_rx_mode(dev); RTL_W8(ChipCmd, CmdTxEnb | CmdRxEnb);
@@ -3191,6 +3187,17 @@ static int rtl8169_poll(struct napi_stru return work_done; } +static void rtl8169_rx_missed(struct net_device *dev, void __iomem *ioaddr) +{ + struct rtl8169_private *tp = netdev_priv(dev); + + if (tp->mac_version > RTL_GIGA_MAC_VER_06) + return; + + dev->stats.rx_missed_errors += (RTL_R32(RxMissed) & 0xffffff); + RTL_W32(RxMissed, 0); +} + static void rtl8169_down(struct net_device *dev) { struct rtl8169_private *tp = netdev_priv(dev);
@@ -3208,9 +3215,7 @@ core_down: rtl8169_asic_down(ioaddr); - /* Update the error counts. */ - dev->stats.rx_missed_errors += RTL_R32(RxMissed); - RTL_W32(RxMissed, 0); + rtl8169_rx_missed(dev, ioaddr); spin_unlock_irq(&tp->lock);
@@ -3332,8 +3337,7 @@ static struct net_device_stats *rtl8169_ if (netif_running(dev)) { spin_lock_irqsave(&tp->lock, flags); - dev->stats.rx_missed_errors += RTL_R32(RxMissed); - RTL_W32(RxMissed, 0); + rtl8169_rx_missed(dev, ioaddr); spin_unlock_irqrestore(&tp->lock, flags); }
@@ -3358,8 +3362,7 @@ static int rtl8169_suspend(struct pci_de rtl8169_asic_down(ioaddr); - dev->stats.rx_missed_errors += RTL_R32(RxMissed); - RTL_W32(RxMissed, 0); + rtl8169_rx_missed(dev, ioaddr); spin_unlock_irq(&tp->lock);
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