svn commit: r279917 - stable/10/sys/dev/ahci

[Alexander Motin]

Author: mav
Date: Thu Mar 12 13:16:05 2015
New Revision: 279917
URL: https://svnweb.freebsd.org/changeset/base/279917

Log:
  MFC r270833 (by imp):
  We were returning 20 bytes as the FIS size to send, but only
  initializing 16. Initialize all 20 so we don't send garbage in the
  Auxiliary register. The SATA standard mandates a 5 dword length for
  the Host to Device FIS.

Modified:
  stable/10/sys/dev/ahci/ahci.c
Directory Properties:
  stable/10/   (props changed)

Modified: stable/10/sys/dev/ahci/ahci.c
==============================================================================
--- stable/10/sys/dev/ahci/ahci.c	Thu Mar 12 12:36:08 2015	(r279916)
+++ stable/10/sys/dev/ahci/ahci.c	Thu Mar 12 13:16:05 2015	(r279917)
@@ -2794,7 +2794,7 @@ ahci_setup_fis(device_t dev, struct ahci
 	struct ahci_channel *ch = device_get_softc(dev);
 	u_int8_t *fis = &ctp->cfis[0];
 
-	bzero(ctp->cfis, 16);
+	bzero(fis, 20);
 	fis[0] = 0x27;  		/* host to device */
 	fis[1] = (ccb->ccb_h.target_id & 0x0f);
 	if (ccb->ccb_h.func_code == XPT_SCSI_IO) {