diff options
| -rw-r--r-- | drivers/scsi/sata_nv.c | 30 |
1 files changed, 24 insertions, 6 deletions
diff --git a/drivers/scsi/sata_nv.c b/drivers/scsi/sata_nv.c index c0cf52cb975..bbbb55eeb73 100644 --- a/drivers/scsi/sata_nv.c +++ b/drivers/scsi/sata_nv.c @@ -29,6 +29,12 @@ * NV-specific details such as register offsets, SATA phy location, * hotplug info, etc. * + * 0.10 + * - Fixed spurious interrupts issue seen with the Maxtor 6H500F0 500GB + * drive. Also made the check_hotplug() callbacks return whether there + * was a hotplug interrupt or not. This was not the source of the + * spurious interrupts, but is the right thing to do anyway. + * * 0.09 * - Fixed bug introduced by 0.08's MCP51 and MCP55 support. * @@ -124,10 +130,10 @@ static void nv_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val); static void nv_host_stop (struct ata_host_set *host_set); static void nv_enable_hotplug(struct ata_probe_ent *probe_ent); static void nv_disable_hotplug(struct ata_host_set *host_set); -static void nv_check_hotplug(struct ata_host_set *host_set); +static int nv_check_hotplug(struct ata_host_set *host_set); static void nv_enable_hotplug_ck804(struct ata_probe_ent *probe_ent); static void nv_disable_hotplug_ck804(struct ata_host_set *host_set); -static void nv_check_hotplug_ck804(struct ata_host_set *host_set); +static int nv_check_hotplug_ck804(struct ata_host_set *host_set); enum nv_host_type { @@ -176,7 +182,7 @@ struct nv_host_desc enum nv_host_type host_type; void (*enable_hotplug)(struct ata_probe_ent *probe_ent); void (*disable_hotplug)(struct ata_host_set *host_set); - void (*check_hotplug)(struct ata_host_set *host_set); + int (*check_hotplug)(struct ata_host_set *host_set); }; static struct nv_host_desc nv_device_tbl[] = { @@ -309,12 +315,16 @@ static irqreturn_t nv_interrupt (int irq, void *dev_instance, qc = ata_qc_from_tag(ap, ap->active_tag); if (qc && (!(qc->tf.ctl & ATA_NIEN))) handled += ata_host_intr(ap, qc); + else + // No request pending? Clear interrupt status + // anyway, in case there's one pending. + ap->ops->check_status(ap); } } if (host->host_desc->check_hotplug) - host->host_desc->check_hotplug(host_set); + handled += host->host_desc->check_hotplug(host_set); spin_unlock_irqrestore(&host_set->lock, flags); @@ -497,7 +507,7 @@ static void nv_disable_hotplug(struct ata_host_set *host_set) outb(intr_mask, host_set->ports[0]->ioaddr.scr_addr + NV_INT_ENABLE); } -static void nv_check_hotplug(struct ata_host_set *host_set) +static int nv_check_hotplug(struct ata_host_set *host_set) { u8 intr_status; @@ -522,7 +532,11 @@ static void nv_check_hotplug(struct ata_host_set *host_set) if (intr_status & NV_INT_STATUS_SDEV_REMOVED) printk(KERN_WARNING "nv_sata: " "Secondary device removed\n"); + + return 1; } + + return 0; } static void nv_enable_hotplug_ck804(struct ata_probe_ent *probe_ent) @@ -560,7 +574,7 @@ static void nv_disable_hotplug_ck804(struct ata_host_set *host_set) pci_write_config_byte(pdev, NV_MCP_SATA_CFG_20, regval); } -static void nv_check_hotplug_ck804(struct ata_host_set *host_set) +static int nv_check_hotplug_ck804(struct ata_host_set *host_set) { u8 intr_status; @@ -585,7 +599,11 @@ static void nv_check_hotplug_ck804(struct ata_host_set *host_set) if (intr_status & NV_INT_STATUS_SDEV_REMOVED) printk(KERN_WARNING "nv_sata: " "Secondary device removed\n"); + + return 1; } + + return 0; } static int __init nv_init(void) |