Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
[libata] ahci: SB600 workaround is suspect... play it safe for now
At least one report claims that a878539ef994787c447a98c2e3ba0fe3dad984ec
failed to solve lockups, whereas the old limit-to-32-bit trick worked.
Restore the 32-bit limit, but also leave the 255-sector limit in place,
because we know that's needed as well.
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
+5
-1
drivers/ata/ahci.c
+5
-1
drivers/ata/ahci.c
···
433
/* board_ahci_sb600 */
434
{
435
AHCI_HFLAGS (AHCI_HFLAG_IGN_SERR_INTERNAL |
436
AHCI_HFLAG_SECT255 | AHCI_HFLAG_NO_PMP),
437
.flags = AHCI_FLAG_COMMON,
438
.link_flags = AHCI_LFLAG_COMMON,
···
1218
{
1219
struct ahci_host_priv *hpriv = dev->link->ap->host->private_data;
1220
1221
-
if (hpriv->flags & AHCI_HFLAG_SECT255)
1222
dev->max_sectors = 255;
1223
}
1224
1225
static unsigned int ahci_dev_classify(struct ata_port *ap)
···
433
/* board_ahci_sb600 */
434
{
435
AHCI_HFLAGS (AHCI_HFLAG_IGN_SERR_INTERNAL |
436
+
AHCI_HFLAG_32BIT_ONLY |
437
AHCI_HFLAG_SECT255 | AHCI_HFLAG_NO_PMP),
438
.flags = AHCI_FLAG_COMMON,
439
.link_flags = AHCI_LFLAG_COMMON,
···
1217
{
1218
struct ahci_host_priv *hpriv = dev->link->ap->host->private_data;
1219
1220
+
if (hpriv->flags & AHCI_HFLAG_SECT255) {
1221
dev->max_sectors = 255;
1222
+
ata_dev_printk(dev, KERN_INFO,
1223
+
"SB600 AHCI: limiting to 255 sectors per cmd\n");
1224
+
}
1225
}
1226
1227
static unsigned int ahci_dev_classify(struct ata_port *ap)