PCI: Warn periodically while waiting for non-CRS ("device ready") status

Add a print statement in pci_bus_wait_crs() so that user observes the
progress of device polling instead of silently waiting for timeout to be
reached.

Signed-off-by: Sinan Kaya <okaya@codeaurora.org>
[bhelgaas: check for timeout first so we don't print "waiting, giving up",
always print time we've slept (not the actual timeout, print a "ready"
message if we've printed a "waiting" message]
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index f09d8cd..9b8a445 100644 (file)
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -1876,11 +1876,16 @@ static bool pci_bus_wait_crs(struct pci_bus *bus, int devfn, u32 *l,
         */
        while (pci_bus_crs_vendor_id(*l)) {
                if (delay > timeout) {
-                       printk(KERN_WARNING "pci %04x:%02x:%02x.%d: not responding\n",
-                              pci_domain_nr(bus), bus->number, PCI_SLOT(devfn),
-                              PCI_FUNC(devfn));
+                       pr_warn("pci %04x:%02x:%02x.%d: not ready after %dms; giving up\n",
+                               pci_domain_nr(bus), bus->number,
+                               PCI_SLOT(devfn), PCI_FUNC(devfn), delay - 1);
+
                        return false;
                }
+               if (delay >= 1000)
+                       pr_info("pci %04x:%02x:%02x.%d: not ready after %dms; waiting\n",
+                               pci_domain_nr(bus), bus->number,
+                               PCI_SLOT(devfn), PCI_FUNC(devfn), delay - 1);
 
                msleep(delay);
                delay *= 2;
@@ -1889,6 +1894,11 @@ static bool pci_bus_wait_crs(struct pci_bus *bus, int devfn, u32 *l,
                        return false;
        }
 
+       if (delay >= 1000)
+               pr_info("pci %04x:%02x:%02x.%d: ready after %dms\n",
+                       pci_domain_nr(bus), bus->number,
+                       PCI_SLOT(devfn), PCI_FUNC(devfn), delay - 1);
+
        return true;
 }