Maybe,Didn't the driver reach the function pci_set_master() because of other
initial or error?
I try to load other myself driver(for ethernet,it also call
pci_set_master() ),and the Bus Master Enable can be set!
Can i comment out some unnecessary initial or step?
--------------------------------------------------
From: "Jeff Garzik" <jgarzik@xxxxxxxxx>
Sent: Thursday, June 12, 2008 10:50 AM
To: "dunneil" <dunneil@xxxxxxx>
Cc: <linux-ide@xxxxxxxxxxxxxxx>
Subject: Re: ahci.c
dunneil wrote:
hi,
My hardware is AHCI SATA controller with FPGA-based PCIE board.My
kernel is 2.6.20.7. after insmod ahci.ko, i run lspci -xxxxvvvv
command.but,it seems that it doesn't set the BUS master enable bit of
PCIE header command register.plz check my header content.
But,i run Pcitree software at windows.The BUS master enable is
observed to be set,and that i can read out a part of sata register value.
how to debug this issue?
ahci.c calls pci_set_master() to enable the BusMaster bit.
Jeff
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