[PATCH] Flush MMIO writes in reset sequence

The obvious safe registers to read is one from PCI config space.

Signed-off-by: Grant Grundler <grundler@parisc-linux.org>
Signed-off-by: Kyle McMartin <kyle@parisc-linux.org>
Signed-off-by: Valerie Henson <val_henson@linux.intel.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/net/tulip/tulip_core.c b/drivers/net/tulip/tulip_core.c
index 2f181809bde2..6a7ca8695ff2 100644
--- a/drivers/net/tulip/tulip_core.c
+++ b/drivers/net/tulip/tulip_core.c
@@ -295,12 +295,14 @@ static void tulip_up(struct net_device *dev)
 
         /* Reset the chip, holding bit 0 set at least 50 PCI cycles. */
         iowrite32(0x00000001, ioaddr + CSR0);
+        pci_read_config_dword(tp->pdev, PCI_COMMAND, &i);  /* flush write */
         udelay(100);
 
         /* Deassert reset.
            Wait the specified 50 PCI cycles after a reset by initializing
            Tx and Rx queues and the address filter list. */
         iowrite32(tp->csr0, ioaddr + CSR0);
+        pci_read_config_dword(tp->pdev, PCI_COMMAND, &i);  /* flush write */
         udelay(100);
 
         if (tulip_debug > 1)