From 83eda202f1f04d5aa2297998fe44cf6641a03b1d Mon Sep 17 00:00:00 2001 From: Francois Romieu Date: Sun, 17 Dec 2006 22:14:09 +0100 Subject: 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 Signed-off-by: Adrian Bunk --- drivers/net/r8169.c | 17 +++++++++++++---- 1 file changed, 13 insertions(+), 4 deletions(-) diff --git a/drivers/net/r8169.c b/drivers/net/r8169.c index 9841acd8bdcc..78c532df4037 100644 --- a/drivers/net/r8169.c +++ b/drivers/net/r8169.c @@ -194,6 +194,7 @@ 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 }; @@ -461,6 +462,8 @@ 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); @@ -2289,12 +2292,17 @@ 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 | @@ -2308,10 +2316,11 @@ 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 -- cgit v1.2.3