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sata_mv: don't blindly enable IRQs 

Part one of simplifying/fixing handling of the main_irq_mask register
to resolve unexpected interrupt issues observed in 2.6.26-rc*.

Don't blindly enable port IRQs at host init time.
Instead, enable only the bits that we want,
which in this case is simply the PCI_ERR bit.

The per-port bits can wait until the ports are reset/probed for devices.

Signed-off-by: Mark Lord <mlord@pobox.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
This commit is contained in:
Mark Lord 2008-05-17 13:34:42 -04:00 committed by Jeff Garzik
parent c443c5002b
commit 51de32d200
1 changed files with 5 additions and 25 deletions
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30
drivers/ata/sata_mv.c
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@ -202,13 +202,6 @@ enum {
HC_MAIN_RSVD = (0x7f << 25), /* bits 31-25 */
HC_MAIN_RSVD_5 = (0x1fff << 19), /* bits 31-19 */
HC_MAIN_RSVD_SOC = (0x3fffffb << 6), /* bits 31-9, 7-6 */
HC_MAIN_MASKED_IRQS = (TRAN_LO_DONE | TRAN_HI_DONE |
PORTS_0_3_COAL_DONE | PORTS_4_7_COAL_DONE |
PORTS_0_7_COAL_DONE | GPIO_INT | TWSI_INT |
HC_MAIN_RSVD),
HC_MAIN_MASKED_IRQS_5 = (PORTS_0_3_COAL_DONE | PORTS_4_7_COAL_DONE |
HC_MAIN_RSVD_5),
HC_MAIN_MASKED_IRQS_SOC = (PORTS_0_3_COAL_DONE | HC_MAIN_RSVD_SOC),
/* SATAHC registers */
HC_CFG_OFS = 0,
@ -3101,25 +3094,12 @@ static int mv_init_host(struct ata_host *host, unsigned int board_idx)
/* and unmask interrupt generation for host regs */
writelfl(hpriv->unmask_all_irqs, mmio + hpriv->irq_mask_ofs);
if (IS_GEN_I(hpriv))
writelfl(~HC_MAIN_MASKED_IRQS_5,
hpriv->main_irq_mask_addr);
else
writelfl(~HC_MAIN_MASKED_IRQS,
hpriv->main_irq_mask_addr);
VPRINTK("HC MAIN IRQ cause/mask=0x%08x/0x%08x "
"PCI int cause/mask=0x%08x/0x%08x\n",
readl(hpriv->main_irq_cause_addr),
readl(hpriv->main_irq_mask_addr),
readl(mmio + hpriv->irq_cause_ofs),
readl(mmio + hpriv->irq_mask_ofs));
} else {
writelfl(~HC_MAIN_MASKED_IRQS_SOC,
hpriv->main_irq_mask_addr);
VPRINTK("HC MAIN IRQ cause/mask=0x%08x/0x%08x\n",
readl(hpriv->main_irq_cause_addr),
readl(hpriv->main_irq_mask_addr));
/*
* enable only global host interrupts for now.
* The per-port interrupts get done later as ports are set up.
*/
writelfl(PCI_ERR, hpriv->main_irq_mask_addr);
}
done:
return rc;