From: Brett Russ <russb@emc.com>
To: Jeff Garzik <jgarzik@pobox.com>
Cc: linux-ide@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH 2.6.13] libata: fix pio_mask values (take 2)
Date: Thu, 1 Sep 2005 21:53:34 -0400 (EDT) [thread overview]
Message-ID: <20050902015334.1ED2520F96@lns1058.lss.emc.com> (raw)
In-Reply-To: <20050830190309.E14FE20F4C@lns1058.lss.emc.com>
ata_get_mode_mask() uses bits 3 and 4 in the pio_mask to represent PIO
modes 3 and 4. The value read from the drive, which reports support
for PIO3 and PIO4 in bits 0 and 1, is shifted left by 3 bits and OR'd
with 0x7 (which then corresponds to PIO 2-0 in libata). Thus, the
drivers below need adjustments to comply with the way pio_mask is
used. I changed the masks from the commented values to all support
PIO4-0, since the spec mandates that PIO0-2 are supported and there's
no reason not to support PIO3 IMO.
Signed-off-by: Brett Russ <russb@emc.com>
Index: linux-2.6.13/drivers/scsi/ahci.c
===================================================================
--- linux-2.6.13.orig/drivers/scsi/ahci.c
+++ linux-2.6.13/drivers/scsi/ahci.c
@@ -244,7 +244,7 @@ static struct ata_port_info ahci_port_in
.host_flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
ATA_FLAG_SATA_RESET | ATA_FLAG_MMIO |
ATA_FLAG_PIO_DMA,
- .pio_mask = 0x03, /* pio3-4 */
+ .pio_mask = 0x1f, /* pio4-0 */
.udma_mask = 0x7f, /* udma0-6 ; FIXME */
.port_ops = &ahci_ops,
},
Index: linux-2.6.13/drivers/scsi/sata_uli.c
===================================================================
--- linux-2.6.13.orig/drivers/scsi/sata_uli.c
+++ linux-2.6.13/drivers/scsi/sata_uli.c
@@ -120,8 +120,8 @@ static struct ata_port_info uli_port_inf
.sht = &uli_sht,
.host_flags = ATA_FLAG_SATA | ATA_FLAG_SATA_RESET |
ATA_FLAG_NO_LEGACY,
- .pio_mask = 0x03, //support pio mode 4 (FIXME)
- .udma_mask = 0x7f, //support udma mode 6
+ .pio_mask = 0x1f, /* pio4-0 */
+ .udma_mask = 0x7f, /* udma6-0 */
.port_ops = &uli_ops,
};
next prev parent reply other threads:[~2005-09-02 1:53 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-08-30 19:03 [PATCH 2.6.13] Fix pio_mask values Brett Russ
2005-09-02 1:53 ` Brett Russ [this message]
2005-09-07 5:55 ` [PATCH 2.6.13] libata: fix pio_mask values (take 2) Jeff Garzik
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