X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=drivers%2Fscsi%2Fsata_nv.c;h=e5b20c6afc18b2e0d68544cc9eac824f33c38c7a;hb=d04ef3a795b3b7b376a02713ed5e211e9ae1f917;hp=c0cf52cb975a9386ba7a4b03ec54fcfb35caa08c;hpb=ed03f430cdc8c802652467e9097606fedc2c7abc;p=linux-2.6

diff --git a/drivers/scsi/sata_nv.c b/drivers/scsi/sata_nv.c
index c0cf52cb97..e5b20c6afc 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[] = {
@@ -227,7 +233,6 @@ static struct scsi_host_template nv_sht = {
 	.can_queue		= ATA_DEF_QUEUE,
 	.this_id		= ATA_SHT_THIS_ID,
 	.sg_tablesize		= LIBATA_MAX_PRD,
-	.max_sectors		= ATA_MAX_SECTORS,
 	.cmd_per_lun		= ATA_SHT_CMD_PER_LUN,
 	.emulated		= ATA_SHT_EMULATED,
 	.use_clustering		= ATA_SHT_USE_CLUSTERING,
@@ -309,12 +314,16 @@ 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 +506,7 @@ 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 +531,11 @@ 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 +573,7 @@ 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 +598,11 @@ 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)