Hi, On Montag, 14. April 2008, Peer Chen wrote: > Volker, > I mean add msleep(x) function between writel(HOST_AHCI_EN, mmio + HOST_CTL) > and readl(mmio + HOST_CTL) cause we ever met a bug that writing data to the > AHCI BAR5 but need a delay to get correct read back value. But forget it, > looks like it's not the same case here. Which mode do you set(ahci or > non-raid) when you encountered the issue that the AHCI_EN bit failed to > set? I found we have workaround for AHCI_EN bit setting in our Bios > programming guide for AHCI mode. you mean this? [ 0.363828] ------------[ cut here ]------------ [ 0.363828] WARNING: at drivers/ata/ahci.c:645 ahci_init_one+0x190/0xa3a() [ 0.363828] Modules linked in: [ 0.363828] Pid: 1, comm: swapper Not tainted 2.6.25-rc8 #2 [ 0.363828] [ 0.363828] Call Trace: [ 0.363828] [<ffffffff8022c5a5>] warn_on_slowpath+0x51/0x63 [ 0.363832] [<ffffffff80220061>] __ioremap+0x8/0x197 [ 0.363872] [<ffffffff803921f4>] pci_conf1_read+0xb2/0xbd [ 0.363911] [<ffffffff802f3316>] pcim_iomap_release+0x0/0x2c [ 0.363950] [<ffffffff802f3316>] pcim_iomap_release+0x0/0x2c [ 0.363989] [<ffffffff803471a9>] devres_find+0x4b/0x65 [ 0.364028] [<ffffffff8036e4cd>] ahci_init_one+0x190/0xa3a [ 0.364067] [<ffffffff802af837>] sysfs_addrm_finish+0x1d/0x209 [ 0.364107] [<ffffffff80284014>] ifind+0x34/0x8d [ 0.364145] [<ffffffff802af54e>] sysfs_find_dirent+0x1b/0x2f [ 0.364184] [<ffffffff802eb75d>] ida_get_new_above+0xf0/0x180 [ 0.364223] [<ffffffff802af837>] sysfs_addrm_finish+0x1d/0x209 [ 0.364263] [<ffffffff802b0378>] sysfs_create_link+0xb6/0x102 [ 0.364303] [<ffffffff802f8664>] pci_device_probe+0x4c/0x72 [ 0.364342] [<ffffffff80344c48>] driver_probe_device+0xb5/0x132 [ 0.364381] [<ffffffff80344ddb>] __driver_attach+0x6f/0xaf [ 0.364419] [<ffffffff80344d6c>] __driver_attach+0x0/0xaf [ 0.364458] [<ffffffff80344d6c>] __driver_attach+0x0/0xaf [ 0.364498] [<ffffffff8034400a>] bus_for_each_dev+0x44/0x6f [ 0.364538] [<ffffffff802a9b57>] proc_match+0x23/0x2d [ 0.364576] [<ffffffff80344876>] bus_add_driver+0xae/0x1f4 [ 0.364614] [<ffffffff8034500a>] driver_register+0x59/0xce [ 0.364654] [<ffffffff802f88a5>] __pci_register_driver+0x4a/0x7d [ 0.364701] [<ffffffff804e56b8>] kernel_init+0x14f/0x2b9 [ 0.364740] [<ffffffff8020be98>] child_rip+0xa/0x12 [ 0.364779] [<ffffffff804e5569>] kernel_init+0x0/0x2b9 [ 0.364817] [<ffffffff8020be8e>] child_rip+0x0/0x12 [ 0.364854] [ 0.364891] ---[ end trace ea9d541113ecaf1e ]--- this happened with AHCI mode set in bios, pci=nomsi as kernel boot parameter and kernel 2.6.25-rc8. Something similar looking happened without pci=nomsi, but in that case I could not scroll back to even make a picture because of the kernel panic (rootfs not found). Glück Auf Volker -- To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
