linux-kernel - r8169 on n2100 (was Re: r8169 mac address change (was Re: [0/3] 2.6.19-rc2: known regressions))

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Message-ID: <20061122231656.GA9991@electric-eye.fr.zoreil.com>
Date:	Thu, 23 Nov 2006 00:16:56 +0100
From:	Francois Romieu <romieu@...zoreil.com>
To:	Martin Michlmayr <tbm@...ius.com>
Cc:	Lennert Buytenhek <buytenh@...tstofly.org>,
	Riku Voipio <riku.voipio@....fi>, linux-kernel@...r.kernel.org
Subject: r8169 on n2100 (was Re: r8169 mac address change (was Re: [0/3] 2.6.19-rc2: known regressions))

Francois Romieu <romieu@...zoreil.com> :
[scrouitch]

You can apply the patch below and 'modprobe r8169 ignore_parity_err=1'.

It apparently does the job and it is not much too intrusive.

diff --git a/drivers/net/r8169.c b/drivers/net/r8169.c
index 27f90b2..2b8c057 100644
--- a/drivers/net/r8169.c
+++ b/drivers/net/r8169.c
@@ -225,6 +225,7 @@ MODULE_DEVICE_TABLE(pci, rtl8169_pci_tbl
 
 static int rx_copybreak = 200;
 static int use_dac;
+static int ignore_parity_err;
 static struct {
 	u32 msg_enable;
 } debug = { -1 };
@@ -469,6 +470,8 @@ module_param(use_dac, int, 0);
 MODULE_PARM_DESC(use_dac, "Enable PCI DAC. Unsafe on 32 bit PCI slot.");
 module_param_named(debug, debug.msg_enable, int, 0);
 MODULE_PARM_DESC(debug, "Debug verbosity level (0=none, ..., 16=all)");
+module_param_named(ignore_parity_err, ignore_parity_err, bool, 0);
+MODULE_PARM_DESC(ignore_parity_err, "Ignore PCI parity error as target. Default: false");
 MODULE_LICENSE("GPL");
 MODULE_VERSION(RTL8169_VERSION);
 
@@ -2332,12 +2335,17 @@ static void rtl8169_pcierr_interrupt(str
 	/*
 	 * The recovery sequence below admits a very elaborated explanation:
 	 * - it seems to work;
-	 * - I did not see what else could be done.
+	 * - I did not see what else could be done;
+	 * - it makes iop3xx happy.
 	 *
 	 * Feel free to adjust to your needs.
 	 */
-	pci_write_config_word(pdev, PCI_COMMAND,
-			      pci_cmd | PCI_COMMAND_SERR | PCI_COMMAND_PARITY);
+	if (ignore_parity_err)
+		pci_cmd &= ~PCI_COMMAND_PARITY;
+	else
+		pci_cmd |= PCI_COMMAND_SERR | PCI_COMMAND_PARITY;
+
+	pci_write_config_word(pdev, PCI_COMMAND, pci_cmd);
 
 	pci_write_config_word(pdev, PCI_STATUS,
 		pci_status & (PCI_STATUS_DETECTED_PARITY |
@@ -2351,10 +2359,11 @@ static void rtl8169_pcierr_interrupt(str
 		tp->cp_cmd &= ~PCIDAC;
 		RTL_W16(CPlusCmd, tp->cp_cmd);
 		dev->features &= ~NETIF_F_HIGHDMA;
-		rtl8169_schedule_work(dev, rtl8169_reinit_task);
 	}
 
 	rtl8169_hw_reset(ioaddr);
+
+	rtl8169_schedule_work(dev, rtl8169_reinit_task);
 }
 
 static void
-
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