linux-kernel - [PATCH v2 1/2] PCI: Report quirk timings with pci_info() instead of pr

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Date:   Wed, 14 Mar 2018 08:30:34 -0500
From:   Bjorn Helgaas <helgaas@...nel.org>
To:     linux-pci@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, Myron Stowe <myron.stowe@...hat.com>,
        Paul Menzel <pmenzel+linux-pci@...gen.mpg.de>,
        Andreas Noever <andreas.noever@...il.com>,
        Alan Stern <stern@...land.harvard.edu>,
        Andy Shevchenko <andy.shevchenko@...il.com>
Subject: [PATCH v2 1/2] PCI: Report quirk timings with pci_info() instead of
 pr_debug()

From: Bjorn Helgaas <bhelgaas@...gle.com>

With "initcall_debug", we report how long every PCI quirk took.  Previously
we used pr_debug(), which means you have to figure out how to enable debug
output.

Log these timings using pci_info() instead so it doesn't depend on DEBUG,
CONFIG_DYNAMIC_DEBUG, etc.

Also, don't log anything at all unless "initcall_debug" is specified.  This
matches what we do in do_one_initcall_debug().

Signed-off-by: Bjorn Helgaas <bhelgaas@...gle.com>
---
 drivers/pci/quirks.c |    7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index ec280f2223b3..97c74e386bcc 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -3004,10 +3004,8 @@ static ktime_t fixup_debug_start(struct pci_dev *dev,
 {
 	ktime_t calltime = 0;
 
-	pci_dbg(dev, "calling %pF\n", fn);
 	if (initcall_debug) {
-		pr_debug("calling  %pF @ %i for %s\n",
-			 fn, task_pid_nr(current), dev_name(&dev->dev));
+		pci_info(dev, "calling  %pF @ %i\n", fn, task_pid_nr(current));
 		calltime = ktime_get();
 	}
 
@@ -3024,8 +3022,7 @@ static void fixup_debug_report(struct pci_dev *dev, ktime_t calltime,
 		rettime = ktime_get();
 		delta = ktime_sub(rettime, calltime);
 		duration = (unsigned long long) ktime_to_ns(delta) >> 10;
-		pr_debug("pci fixup %pF returned after %lld usecs for %s\n",
-			 fn, duration, dev_name(&dev->dev));
+		pci_info(dev, "%pF took %lld usecs\n", fn, duration);
 	}
 }