Index: ahcisata_core.c
===================================================================
RCS file: /cvsroot/src/sys/dev/ic/ahcisata_core.c,v
retrieving revision 1.73
diff -u -p -r1.73 ahcisata_core.c
--- ahcisata_core.c	12 Jan 2019 15:16:51 -0000	1.73
+++ ahcisata_core.c	16 Jan 2019 19:43:27 -0000
@@ -774,8 +774,12 @@ ahci_exec_fis(struct ata_channel *chp, i
 		    0)
 			return 0;
 		is = AHCI_READ(sc, AHCI_P_IS(chp->ch_channel));
+		AHCI_WRITE(sc, AHCI_P_IS(chp->ch_channel), is);
+		if (is > 0)
+			printf("is %x ", is);
+
 		if (is & (AHCI_P_IX_TFES | AHCI_P_IX_HBFS | AHCI_P_IX_HBDS |
-		    AHCI_P_IX_IFS |
+		    AHCI_P_IX_IFS | AHCI_P_IX_IPMS |
 		    AHCI_P_IX_OFS | AHCI_P_IX_UFS)) {
 			if ((is & (AHCI_P_IX_DHRS|AHCI_P_IX_TFES)) ==
 			    (AHCI_P_IX_DHRS|AHCI_P_IX_TFES)) {
@@ -863,7 +867,7 @@ ahci_do_reset_drive(struct ata_channel *
 	 * controllers fail to process the SRST clear operation unless
 	 * we wait for at least this period between the set and clear commands.
 	 */
-	ata_delay(chp, 10, "ahcirstw", flags);
+	ata_delay(chp, 100, "ahcirstw", flags);
 
 	cmd_h->cmdh_flags = htole16(RHD_FISLEN / 4 |
 	    (drive << AHCI_CMDH_F_PMP_SHIFT));