[patch 04/10] [TULIP] Flush MMIO writes in reset sequence

[Valerie Henson <val_henson@linux.intel.com>]

From: Grant Grundler <grundler@parisc-linux.org>

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>

---
 drivers/net/tulip/tulip_core.c |    2 ++
 1 files changed, 2 insertions(+)

--- linux-2.6.18-rc4-mm1.orig/drivers/net/tulip/tulip_core.c
+++ linux-2.6.18-rc4-mm1/drivers/net/tulip/tulip_core.c
@@ -295,12 +295,14 @@ static void tulip_up(struct net_device *
 
 	/* 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)

--
-
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