From: Aaron Sierra <asierra@xes-inc.com>
Date: Fri, 25 May 2012 19:11:39 +0000 (-0500)
Subject: lspci: zero address in IO isn't always unassigned
X-Git-Tag: v3.1.10~6
X-Git-Url: http://mj.ucw.cz/gitweb/?a=commitdiff_plain;h=00bf6625153067e3d894beb984fc3a2a381f8700;p=pciutils.git

lspci: zero address in IO isn't always unassigned

Zero is a valid address in I/O space, so display it and it's associated
size when IO is enabled in the PCI command register.

From arch/powerpc/kernel/pci-common.c:

/* Here, we are a bit different than memory as typically IO space
 * starting at low addresses -is- valid. What we do instead [is] that
 * we consider as unassigned anything that doesn't have IO enabled
 * in the PCI command register, and that's it.
 */

Signed-off-by: Aaron Sierra <asierra@xes-inc.com>
---

diff --git a/lib/sysfs.c b/lib/sysfs.c
index 1ec4afb..2197fab 100644
--- a/lib/sysfs.c
+++ b/lib/sysfs.c
@@ -125,7 +125,7 @@ sysfs_get_resources(struct pci_dev *d)
 	break;
       if (sscanf(buf, "%llx %llx %llx", &start, &end, &flags) != 3)
 	a->error("Syntax error in %s", namebuf);
-      if (start)
+      if (end > start)
 	size = end - start + 1;
       else
 	size = 0;
diff --git a/lspci.c b/lspci.c
index 681ef6a..a67a516 100644
--- a/lspci.c
+++ b/lspci.c
@@ -372,7 +372,7 @@ show_bases(struct device *d, int cnt)
 	{
 	  pciaddr_t a = pos & PCI_BASE_ADDRESS_IO_MASK;
 	  printf("I/O ports at ");
-	  if (a)
+	  if (a || (cmd & PCI_COMMAND_IO))
 	    printf(PCIADDR_PORT_FMT, a);
 	  else if (flg & PCI_BASE_ADDRESS_IO_MASK)
 	    printf("<ignored>");