Merge tag 'ata-ata-6.17-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/libata/linux

Pull ata fixes from Damien Le Moal:

 - Fix a regression affecting old IDE/PATA device scan and introduced by
   the recent link power management cleanups & fixes. The regression
   prevented devices from being properly detected (me)

 - Fix command duration limits (CDL) feature control: attempting to
   enable the feature while NCQ commands are being executed resulted in
   a silent failure to enable CDL when needed (Igor)

* tag 'ata-ata-6.17-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/libata/linux:
  ata: libata-scsi: Fix CDL control
  ata: libata-eh: Fix link state check for IDE/PATA ports

Author: torvalds

drivers/ata/libata-eh.c

@@ -2075,7 +2075,7 @@ static void ata_eh_get_success_sense(struct ata_link *link)
  * Check if a link is established. This is a relaxed version of
  * ata_phys_link_online() which accounts for the fact that this is potentially
  * called after changing the link power management policy, which may not be
- * reflected immediately in the SSTAUS register (e.g., we may still be seeing
+ * reflected immediately in the SStatus register (e.g., we may still be seeing
  * the PHY in partial, slumber or devsleep Partial power management state.
  * So check that:
  * - A device is still present, that is, DET is 1h (Device presence detected
@@ -2089,8 +2089,13 @@ static bool ata_eh_link_established(struct ata_link *link)
 	u32 sstatus;
 	u8 det, ipm;
 
+	/*
+	 * For old IDE/PATA adapters that do not have a valid scr_read method,
+	 * or if reading the SStatus register fails, assume that the device is
+	 * present. Device probe will determine if that is really the case.
+	 */
 	if (sata_scr_read(link, SCR_STATUS, &sstatus))
-		return false;
+		return true;
 
 	det = sstatus & 0x0f;
 	ipm = (sstatus >> 8) & 0x0f;

drivers/ata/libata-scsi.c

@@ -3904,21 +3904,16 @@ static int ata_mselect_control_ata_feature(struct ata_queued_cmd *qc,
 	/* Check cdl_ctrl */
 	switch (buf[0] & 0x03) {
 	case 0:
-		/* Disable CDL if it is enabled */
-		if (!(dev->flags & ATA_DFLAG_CDL_ENABLED))
-			return 0;
+		/* Disable CDL */
 		ata_dev_dbg(dev, "Disabling CDL\n");
 		cdl_action = 0;
 		dev->flags &= ~ATA_DFLAG_CDL_ENABLED;
 		break;
 	case 0x02:
 		/*
-		 * Enable CDL if not already enabled. Since this is mutually
-		 * exclusive with NCQ priority, allow this only if NCQ priority
-		 * is disabled.
+		 * Enable CDL. Since CDL is mutually exclusive with NCQ
+		 * priority, allow this only if NCQ priority is disabled.
 		 */
-		if (dev->flags & ATA_DFLAG_CDL_ENABLED)
-			return 0;
 		if (dev->flags & ATA_DFLAG_NCQ_PRIO_ENABLED) {
 			ata_dev_err(dev,
 				"NCQ priority must be disabled to enable CDL\n");