lspci: Decode PCIe DevCap "Acceptable Latencies" only for Endpoints

The PCIe Device Capabilities "Endpoint L0s Acceptable Latency" and
"Endpoint L1 Acceptable Latency" are defined only for Endpoint functions,
so don't display them unless this is an endpoint.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

diff --git a/ls-caps.c b/ls-caps.c
index a1a1546beb953c4298c16548591681e8c9ba0b5a..347f50ab7c273d613dfac4b7ec0ae39d9d8437f4 100644 (file)
--- a/ls-caps.c
+++ b/ls-caps.c
@@ -659,11 +659,14 @@ static void cap_express_dev(struct device *d, int where, int type)
   u16 w;
 
   t = get_conf_long(d, where + PCI_EXP_DEVCAP);
-  printf("\t\tDevCap:\tMaxPayload %d bytes, PhantFunc %d, Latency L0s %s, L1 %s\n",
+  printf("\t\tDevCap:\tMaxPayload %d bytes, PhantFunc %d",
        128 << (t & PCI_EXP_DEVCAP_PAYLOAD),
-       (1 << ((t & PCI_EXP_DEVCAP_PHANTOM) >> 3)) - 1,
+       (1 << ((t & PCI_EXP_DEVCAP_PHANTOM) >> 3)) - 1);
+  if ((type == PCI_EXP_TYPE_ENDPOINT) || (type == PCI_EXP_TYPE_LEG_END))
+    printf(", Latency L0s %s, L1 %s",
        latency_l0s((t & PCI_EXP_DEVCAP_L0S) >> 6),
        latency_l1((t & PCI_EXP_DEVCAP_L1) >> 9));
+  printf("\n");
   printf("\t\t\tExtTag%c", FLAG(t, PCI_EXP_DEVCAP_EXT_TAG));
   if ((type == PCI_EXP_TYPE_ENDPOINT) || (type == PCI_EXP_TYPE_LEG_END) ||
       (type == PCI_EXP_TYPE_UPSTREAM) || (type == PCI_EXP_TYPE_PCI_BRIDGE))