tile PCI RC: gentler warning for missing plug-in PCI

Besides using pr_info() to print the linkdown status for a plug-in
slot, add extra indication that this is expected if the slot is empty.

Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>

diff --git a/arch/tile/include/hv/drv_trio_intf.h b/arch/tile/include/hv/drv_trio_intf.h
index ef9f3f5..ec643a0 100644 (file)
--- a/arch/tile/include/hv/drv_trio_intf.h
+++ b/arch/tile/include/hv/drv_trio_intf.h
@@ -64,8 +64,9 @@ struct pcie_port_property
    *  will not consider it an error if the link comes up as a x8 link. */
   uint8_t allow_x8: 1;
 
-  /** Reserved. */
-  uint8_t reserved: 1;
+  /** If true, this link is connected to a device which may or may not
+   *  be present. */
+  uint8_t removable: 1;
 
 };
 

diff --git a/arch/tile/kernel/pci_gx.c b/arch/tile/kernel/pci_gx.c
index e0d6664..bf8c69d 100644 (file)
--- a/arch/tile/kernel/pci_gx.c
+++ b/arch/tile/kernel/pci_gx.c
@@ -729,8 +729,14 @@ int __init pcibios_init(void)
                        __gxio_mmio_read(trio_context->mmio_base_mac +
                                         reg_offset);
                if (!port_status.dl_up) {
-                       pr_err("PCI: link is down, MAC %d on TRIO %d\n",
-                               mac, trio_index);
+                       if (pcie_ports[trio_index][mac].removable) {
+                               pr_info("PCI: link is down, MAC %d on TRIO %d\n",
+                                       mac, trio_index);
+                               pr_info("This is expected if no PCIe card"
+                                       " is connected to this link\n");
+                       } else
+                               pr_err("PCI: link is down, MAC %d on TRIO %d\n",
+                                       mac, trio_index);
                        continue;
                }