AcoSail/kernel_optimize_test
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Merge branch 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/libata-dev

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* 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/libata-dev:
  libata: retry link resume if necessary
  ata_piix: enable 32bit PIO on SATA piix
  sata_promise: don't classify overruns as HSM errors
This commit is contained in:
Linus Torvalds 2010-01-12 20:56:20 -08:00
commit 2d13c8f068
4 changed files with 37 additions and 10 deletions
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2
drivers/ata/ata_piix.c
View File

@ -329,7 +329,7 @@ static struct ata_port_operations ich_pata_ops = {
};
static struct ata_port_operations piix_sata_ops = {
.inherits = &ata_bmdma_port_ops,
.inherits = &ata_bmdma32_port_ops,
};
static struct ata_port_operations piix_sidpr_sata_ops = {

40
drivers/ata/libata-core.c
View File

@ -3790,21 +3790,45 @@ int sata_link_debounce(struct ata_link *link, const unsigned long *params,
int sata_link_resume(struct ata_link *link, const unsigned long *params,
unsigned long deadline)
{
int tries = ATA_LINK_RESUME_TRIES;
u32 scontrol, serror;
int rc;
if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
return rc;
scontrol = (scontrol & 0x0f0) | 0x300;
if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol)))
return rc;
/* Some PHYs react badly if SStatus is pounded immediately
* after resuming. Delay 200ms before debouncing.
/*
* Writes to SControl sometimes get ignored under certain
* controllers (ata_piix SIDPR). Make sure DET actually is
* cleared.
*/
msleep(200);
do {
scontrol = (scontrol & 0x0f0) | 0x300;
if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol)))
return rc;
/*
* Some PHYs react badly if SStatus is pounded
* immediately after resuming. Delay 200ms before
* debouncing.
*/
msleep(200);
/* is SControl restored correctly? */
if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
return rc;
} while ((scontrol & 0xf0f) != 0x300 && --tries);
if ((scontrol & 0xf0f) != 0x300) {
ata_link_printk(link, KERN_ERR,
"failed to resume link (SControl %X)\n",
scontrol);
return 0;
}
if (tries < ATA_LINK_RESUME_TRIES)
ata_link_printk(link, KERN_WARNING,
"link resume succeeded after %d retries\n",
ATA_LINK_RESUME_TRIES - tries);
if ((rc = sata_link_debounce(link, params, deadline)))
return rc;

2
drivers/ata/sata_promise.c
View File

@ -862,7 +862,7 @@ static void pdc_error_intr(struct ata_port *ap, struct ata_queued_cmd *qc,
if (port_status & PDC_DRIVE_ERR)
ac_err_mask |= AC_ERR_DEV;
if (port_status & (PDC_OVERRUN_ERR | PDC_UNDERRUN_ERR))
ac_err_mask |= AC_ERR_HSM;
ac_err_mask |= AC_ERR_OTHER;
if (port_status & (PDC2_ATA_HBA_ERR | PDC2_ATA_DMA_CNT_ERR))
ac_err_mask |= AC_ERR_ATA_BUS;
if (port_status & (PDC_PH_ERR | PDC_SH_ERR | PDC_DH_ERR | PDC2_HTO_ERR

3
include/linux/libata.h
View File

@ -354,6 +354,9 @@ enum {
/* max tries if error condition is still set after ->error_handler */
ATA_EH_MAX_TRIES = 5,
/* sometimes resuming a link requires several retries */
ATA_LINK_RESUME_TRIES = 5,
/* how hard are we gonna try to probe/recover devices */
ATA_PROBE_MAX_TRIES = 3,
ATA_EH_DEV_TRIES = 3,