add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/drivers/ata/libata-sata.c
..
..
@@ -317,7 +317,7 @@
317
317
 		 * immediately after resuming.  Delay 200ms before
318
318
 		 * debouncing.
319
319
 		 */
320
-		if (!(link->flags & ATA_LFLAG_NO_DB_DELAY))
320
+		if (!(link->flags & ATA_LFLAG_NO_DEBOUNCE_DELAY))
321
321
 			ata_msleep(link->ap, 200);
322
322
 
323
323
 		/* is SControl restored correctly? */
..
..
@@ -394,10 +394,23 @@
394
394
 	case ATA_LPM_MED_POWER_WITH_DIPM:
395
395
 	case ATA_LPM_MIN_POWER_WITH_PARTIAL:
396
396
 	case ATA_LPM_MIN_POWER:
397
-		if (ata_link_nr_enabled(link) > 0)
398
-			/* no restrictions on LPM transitions */
397
+		if (ata_link_nr_enabled(link) > 0) {
398
+			/* assume no restrictions on LPM transitions */
399
399
 			scontrol &= ~(0x7 << 8);
400
-		else {
400
+
401
+			/*
402
+			 * If the controller does not support partial, slumber,
403
+			 * or devsleep, then disallow these transitions.
404
+			 */
405
+			if (link->ap->host->flags & ATA_HOST_NO_PART)
406
+				scontrol |= (0x1 << 8);
407
+
408
+			if (link->ap->host->flags & ATA_HOST_NO_SSC)
409
+				scontrol |= (0x2 << 8);
410
+
411
+			if (link->ap->host->flags & ATA_HOST_NO_DEVSLP)
412
+				scontrol |= (0x4 << 8);
413
+		} else {
401
414
 			/* empty port, power off */
402
415
 			scontrol &= ~0xf;
403
416
 			scontrol |= (0x1 << 2);