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[PATCH] Necessary evil to get sata_vsc to initialize with Intel iq3124h hba

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* libata does not care about error interrupts, so handle them locally
* the interrupts that are ignored only appear to happen at init time

Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
This commit is contained in:
Dan Williams 2005-12-14 13:10:49 -07:00 committed by Jeff Garzik
parent cfe91f9ce2
commit 2ae5b30ff0
1 changed files with 29 additions and 1 deletions
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30
drivers/scsi/sata_vsc.c
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@ -81,6 +81,19 @@
/* Port stride */
#define VSC_SATA_PORT_OFFSET 0x200
/* Error interrupt status bit offsets */
#define VSC_SATA_INT_ERROR_E_OFFSET 2
#define VSC_SATA_INT_ERROR_P_OFFSET 4
#define VSC_SATA_INT_ERROR_T_OFFSET 5
#define VSC_SATA_INT_ERROR_M_OFFSET 1
#define is_vsc_sata_int_err(port_idx, int_status) \
(int_status & ((1 << (VSC_SATA_INT_ERROR_E_OFFSET + (8 * port_idx))) | \
(1 << (VSC_SATA_INT_ERROR_P_OFFSET + (8 * port_idx))) | \
(1 << (VSC_SATA_INT_ERROR_T_OFFSET + (8 * port_idx))) | \
(1 << (VSC_SATA_INT_ERROR_M_OFFSET + (8 * port_idx))) \
)\
)
static u32 vsc_sata_scr_read (struct ata_port *ap, unsigned int sc_reg)
{
@ -201,13 +214,28 @@ static irqreturn_t vsc_sata_interrupt (int irq, void *dev_instance,
struct ata_port *ap;
ap = host_set->ports[i];
if (is_vsc_sata_int_err(i, int_status)) {
u32 err_status;
printk(KERN_DEBUG "%s: ignoring interrupt(s)\n", __FUNCTION__);
err_status = ap ? vsc_sata_scr_read(ap, SCR_ERROR) : 0;
vsc_sata_scr_write(ap, SCR_ERROR, err_status);
handled++;
}
if (ap && !(ap->flags &
(ATA_FLAG_PORT_DISABLED|ATA_FLAG_NOINTR))) {
struct ata_queued_cmd *qc;
qc = ata_qc_from_tag(ap, ap->active_tag);
if (qc && (!(qc->tf.ctl & ATA_NIEN)))
if (qc && (!(qc->tf.ctl & ATA_NIEN))) {
handled += ata_host_intr(ap, qc);
} else {
printk(KERN_DEBUG "%s: ignoring interrupt(s)\n", __FUNCTION__);
ata_chk_status(ap);
handled++;
}
}
}
}