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* [PATCH 3/5] sata_nv: Cleanup taskfile setup
@ 2007-02-20  1:02 Robert Hancock
  0 siblings, 0 replies; only message in thread
From: Robert Hancock @ 2007-02-20  1:02 UTC (permalink / raw)
  To: linux-kernel, linux-ide, Jeff Garzik, Andrew Morton

This edits the taskfile setup to more closely match the way that libata
sends the taskfile for other controllers. This avoids putting taskfile writes
into the CPB buffer that are not needed according to the taskfile flags.

Signed-off-by: Robert Hancock <hancockr@shaw.ca>

--- linux-2.6.20-git6edit/drivers/ata/sata_nv.c	2007-02-15 22:36:02.000000000 -0600
+++ linux-2.6.20-git6edit/drivers/ata/sata_nv.c.delayandfixes	2007-02-19 17:00:14.000000000 -0600
@@ -662,29 +662,30 @@ static unsigned int nv_adma_tf_to_cpb(st
 {
 	unsigned int idx = 0;
 
-	cpb[idx++] = cpu_to_le16((ATA_REG_DEVICE << 8) | tf->device | WNB);
-
-	if ((tf->flags & ATA_TFLAG_LBA48) == 0) {
-		cpb[idx++] = cpu_to_le16(IGN);
-		cpb[idx++] = cpu_to_le16(IGN);
-		cpb[idx++] = cpu_to_le16(IGN);
-		cpb[idx++] = cpu_to_le16(IGN);
-		cpb[idx++] = cpu_to_le16(IGN);
-	}
-	else {
-		cpb[idx++] = cpu_to_le16((ATA_REG_ERR   << 8) | tf->hob_feature);
-		cpb[idx++] = cpu_to_le16((ATA_REG_NSECT << 8) | tf->hob_nsect);
-		cpb[idx++] = cpu_to_le16((ATA_REG_LBAL  << 8) | tf->hob_lbal);
-		cpb[idx++] = cpu_to_le16((ATA_REG_LBAM  << 8) | tf->hob_lbam);
-		cpb[idx++] = cpu_to_le16((ATA_REG_LBAH  << 8) | tf->hob_lbah);
-	}
-	cpb[idx++] = cpu_to_le16((ATA_REG_ERR    << 8) | tf->feature);
-	cpb[idx++] = cpu_to_le16((ATA_REG_NSECT  << 8) | tf->nsect);
-	cpb[idx++] = cpu_to_le16((ATA_REG_LBAL   << 8) | tf->lbal);
-	cpb[idx++] = cpu_to_le16((ATA_REG_LBAM   << 8) | tf->lbam);
-	cpb[idx++] = cpu_to_le16((ATA_REG_LBAH   << 8) | tf->lbah);
+	if(tf->flags & ATA_TFLAG_ISADDR) {
+		if (tf->flags & ATA_TFLAG_LBA48) {
+			cpb[idx++] = cpu_to_le16((ATA_REG_ERR   << 8) | tf->hob_feature | WNB);
+			cpb[idx++] = cpu_to_le16((ATA_REG_NSECT << 8) | tf->hob_nsect);
+			cpb[idx++] = cpu_to_le16((ATA_REG_LBAL  << 8) | tf->hob_lbal);
+			cpb[idx++] = cpu_to_le16((ATA_REG_LBAM  << 8) | tf->hob_lbam);
+			cpb[idx++] = cpu_to_le16((ATA_REG_LBAH  << 8) | tf->hob_lbah);
+			cpb[idx++] = cpu_to_le16((ATA_REG_ERR    << 8) | tf->feature);
+		} else
+			cpb[idx++] = cpu_to_le16((ATA_REG_ERR    << 8) | tf->feature | WNB);
+			
+		cpb[idx++] = cpu_to_le16((ATA_REG_NSECT  << 8) | tf->nsect);
+		cpb[idx++] = cpu_to_le16((ATA_REG_LBAL   << 8) | tf->lbal);
+		cpb[idx++] = cpu_to_le16((ATA_REG_LBAM   << 8) | tf->lbam);
+		cpb[idx++] = cpu_to_le16((ATA_REG_LBAH   << 8) | tf->lbah);
+	}
+	
+	if(tf->flags & ATA_TFLAG_DEVICE)
+		cpb[idx++] = cpu_to_le16((ATA_REG_DEVICE << 8) | tf->device);
 
 	cpb[idx++] = cpu_to_le16((ATA_REG_CMD    << 8) | tf->command | CMDEND);
+	
+	while(idx < 12)
+		cpb[idx++] = cpu_to_le16(IGN);
 
 	return idx;
 }


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2007-02-20  1:02 [PATCH 3/5] sata_nv: Cleanup taskfile setup Robert Hancock

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