[SCSI] aic7xxx: Take the LED out of diagnostic mode on PM resume

Take the Diag/Activity-LED of the HBA out of diagnostic mode on PM
resume after successful PM resume from standby and HBA restart, it
remained always on before. If something fails before complete
recovery, it should remain on, since it is a diagnostics LED, reason
for the used higher layer for the clear.

Signed-off-by: thomas.schorpp@gmail.com
Acked-by: NHannes Reinecke <hare@suse.de>
Signed-off-by: NJames Bottomley <James.Bottomley@HansenPartnership.com>

drivers/scsi/aic7xxx/aic7xxx_core.c

@@ -814,6 +814,7 @@ ahc_intr(struct ahc_softc *ahc)
 static void
 ahc_restart(struct ahc_softc *ahc)
 {
+	uint8_t	sblkctl;
 
 	ahc_pause(ahc);
 
@@ -868,6 +869,12 @@ ahc_restart(struct ahc_softc *ahc)
 	ahc_outb(ahc, SEQADDR0, 0);
 	ahc_outb(ahc, SEQADDR1, 0);
 
+	/*
+	 * Take the LED out of diagnostic mode on PM resume, too
+	 */
+	sblkctl = ahc_inb(ahc, SBLKCTL);
+	ahc_outb(ahc, SBLKCTL, (sblkctl & ~(DIAGLEDEN|DIAGLEDON)));
+
 	ahc_unpause(ahc);
 }