svn commit: r335013 - head/sys/powerpc/powernv

[Breno Leitao]

Author: leitao
Date: Tue Jun 12 19:50:33 2018
New Revision: 335013
URL: https://svnweb.freebsd.org/changeset/base/335013

Log:
  powerpc64/powernv: Avoid type promotion
  
  There is a type promotion that transform count = -1 into a unsigned int causing
  the default TCE SEG SIZE not being returned on a Boston POWER9 machine.
  
  This machine does not have the 'ibm,supported-tce-sizes' entries, thus, count
  is set to -1, and the function continue to execute instead of returning.
  
  Reviewed by: jhibbits, wma
  Approved by: jhibbits (mentor)
  Differential Revision: https://reviews.freebsd.org/D15763

Modified:
  head/sys/powerpc/powernv/opal_pci.c

Modified: head/sys/powerpc/powernv/opal_pci.c
==============================================================================
--- head/sys/powerpc/powernv/opal_pci.c	Tue Jun 12 19:36:32 2018	(r335012)
+++ head/sys/powerpc/powernv/opal_pci.c	Tue Jun 12 19:50:33 2018	(r335013)
@@ -221,7 +221,7 @@ max_tce_size(device_t dev)
 
 	count = OF_getencprop(node, "ibm,supported-tce-sizes",
 	    sizes, sizeof(sizes));
-	if (count < sizeof(cell_t))
+	if (count < (int) sizeof(cell_t))
 		return OPAL_PCI_TCE_DEFAULT_SEG_SIZE;
 
 	count /= sizeof(cell_t);