svn commit: r341400 - head/sys/dev/sound/pcm

[Konstantin Belousov]

Author: kib
Date: Sun Dec  2 13:29:13 2018
New Revision: 341400
URL: https://svnweb.freebsd.org/changeset/base/341400

Log:
  Add a comment noting that the additional range checks are not needed.
  
  The object size is set in the dsp_mmap_single() which provides the
  range limit by vm_fault().
  
  Reported by:	C Turt <ecturt at gmail.com>
  Reviewed by:	alc, markj
  admbug:		781
  MFC after:	2 weeks
  Sponsored by:	The FreeBSD Foundation

Modified:
  head/sys/dev/sound/pcm/dsp.c

Modified: head/sys/dev/sound/pcm/dsp.c
==============================================================================
--- head/sys/dev/sound/pcm/dsp.c	Sun Dec  2 13:27:36 2018	(r341399)
+++ head/sys/dev/sound/pcm/dsp.c	Sun Dec  2 13:29:13 2018	(r341400)
@@ -2205,7 +2205,10 @@ dsp_mmap(struct cdev *i_dev, vm_ooffset_t offset, vm_p
     int nprot, vm_memattr_t *memattr)
 {
 
-	/* XXX memattr is not honored */
+	/*
+	 * offset is in range due to checks in dsp_mmap_single().
+	 * XXX memattr is not honored.
+	 */
 	*paddr = vtophys(offset);
 	return (0);
 }