The patch titled
pata_it821x in 2.6.27: works but no LBA48 and "hdparm -t" is slower
has been removed from the -mm tree. Its filename was
pata_it821x-in-2627-works-but-no-lba48-and-hdparm-t-is-slower.patch
This patch was dropped because it was merged into mainline or a subsystem tree
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
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Subject: pata_it821x in 2.6.27: works but no LBA48 and "hdparm -t" is slower
From: Ondrej Zary <linux@xxxxxxxxxxxxxxxxxxxx>
This patch fixes LBA48 on pata_it821x RAID volumes - and to my surprise, also
increases the "hdparm -t" speed back. Haven't tested access to >128GB area.
ACPI: PCI Interrupt Link [LNKC] enabled at IRQ 11
pata_it821x 0000:00:12.0: PCI INT A -> Link[LNKC] -> GSI 11 (level, low) -> IRQ 11
pata_it821x: controller in smart mode.
pata_it821x 0000:00:12.0: setting latency timer to 64
pata_it821x: Firmware 02/09/3030
0: MWDMA2 RAID1RAID 0+1 Volume: 0 SAMSUNG HD400LD
1: MWDMA2 RAID1RAID 0+1 Volume: 0 SAMSUNG HD400LD
scsi2 : pata_it821x
scsi3 : pata_it821x
ata3: PATA max UDMA/133 cmd 0x6800 ctl 0x6c00 bmdma 0x7800 irq 11
ata4: PATA max UDMA/133 cmd 0x7000 ctl 0x7400 bmdma 0x7808 irq 11
ata3.00: ATA-4: Integrated Technology Express Inc, , max MWDMA2
ata3.00: 781422766 sectors, multi 0: LBA48
ata3.00: RAID1 volume.
ata3.00: configured for DMA
scsi 2:0:0:0: Direct-Access ATA Integrated Techn n/a PQ: 0 ANSI: 5
sd 2:0:0:0: [sdb] 781422766 512-byte hardware sectors (400088 MB)
sd 2:0:0:0: [sdb] Write Protect is off
sd 2:0:0:0: [sdb] Mode Sense: 00 3a 00 00
sd 2:0:0:0: [sdb] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA
sd 2:0:0:0: [sdb] 781422766 512-byte hardware sectors (400088 MB)
sd 2:0:0:0: [sdb] Write Protect is off
sd 2:0:0:0: [sdb] Mode Sense: 00 3a 00 00
sd 2:0:0:0: [sdb] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA
sdb: sdb1 sdb2 sdb3 sdb4
sd 2:0:0:0: [sdb] Attached SCSI disk
sd 2:0:0:0: Attached scsi generic sg2 type 0
/dev/sdb:
Timing buffered disk reads: 60 MB in 3.01 seconds = 19.91 MB/sec
Fix LBA48 on pata_it821x RAID volumes.
Signed-off-by: Ondrej Zary <linux@xxxxxxxxxxxxxxxxxxxx>
Cc: Jeff Garzik <jeff@xxxxxxxxxx>
Cc: <stable@xxxxxxxxxx>
Acked-by: Alan Cox <alan@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/ata/pata_it821x.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff -puN drivers/ata/pata_it821x.c~pata_it821x-in-2627-works-but-no-lba48-and-hdparm-t-is-slower drivers/ata/pata_it821x.c
--- a/drivers/ata/pata_it821x.c~pata_it821x-in-2627-works-but-no-lba48-and-hdparm-t-is-slower
+++ a/drivers/ata/pata_it821x.c
@@ -557,9 +557,8 @@ static unsigned int it821x_read_id(struc
if (strstr(model_num, "Integrated Technology Express")) {
/* Set feature bits the firmware neglects */
id[49] |= 0x0300; /* LBA, DMA */
- id[82] |= 0x0400; /* LBA48 */
id[83] &= 0x7FFF;
- id[83] |= 0x4000; /* Word 83 is valid */
+ id[83] |= 0x4400; /* Word 83 is valid and LBA48 */
id[86] |= 0x0400; /* LBA48 on */
id[ATA_ID_MAJOR_VER] |= 0x1F;
}
_
Patches currently in -mm which might be from linux@xxxxxxxxxxxxxxxxxxxx are
origin.patch
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