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authorFrancois Romieu <romieu@fr.zoreil.com>2006-11-23 00:00:42 +0100
committerFrancois Romieu <romieu@electric-eye.fr.zoreil.com>2006-12-04 00:42:40 +0100
commitd03902b8864d7814c938f67befade5a3bba68708 (patch)
treec68791287e5010d709ad2ff87905cb8286899c6f /drivers/net
parent9cb427b6ff0b3e235c518acf5c1fcbbfc95f0ae2 (diff)
r8169: tweak the PCI data parity error recovery
The 8110SB based n2100 board signals a lot of what ought to be PCI data parity errors durint operation of the 8169 as target. Experiment proved that the driver can ignore the error and process the packet as if nothing had happened. Let's add an ad-hoc knob to enable users to fix their system while avoiding the risks of a wholesale change. Signed-off-by: Francois Romieu <romieu@fr.zoreil.com>
Diffstat (limited to 'drivers/net')
-rw-r--r--drivers/net/r8169.c17
1 files changed, 13 insertions, 4 deletions
diff --git a/drivers/net/r8169.c b/drivers/net/r8169.c
index c8fa9b1b229..7438049ca6d 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);
@@ -2380,12 +2383,17 @@ static void rtl8169_pcierr_interrupt(struct net_device *dev)
/*
* 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 |
@@ -2399,10 +2407,11 @@ static void rtl8169_pcierr_interrupt(struct net_device *dev)
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