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SubjectRe: 2.6.19-rc2-mm2 AHCI lengthy pause on detection
Berck E. Nash wrote:
> AHCI pauses heartily on during detection boot, but eventually proceeds.
> This problem currently exists with 2.6.19-rc2-mm1, but did not exist in
> 2.6.17.3. I realize that's a huge gap, and if you'd like me to narrow
> it down, I'll be glad to try.

Can you try the attached patch? And please post the result of hdparm -I
/dev/sdX.

--
tejun
diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index 2592912..8215139 100644
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -278,8 +278,7 @@ static const struct ata_port_info ahci_p
{
.sht = &ahci_sht,
.flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
- ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA |
- ATA_FLAG_SKIP_D2H_BSY,
+ ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA,
.pio_mask = 0x1f, /* pio0-4 */
.udma_mask = 0x7f, /* udma0-6 ; FIXME */
.port_ops = &ahci_ops,
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