linux-kernel - [PATCH V8 2/2] PCI: display not responding message while device is unreachable

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Message-Id: <1502071792-15263-2-git-send-email-okaya@codeaurora.org>
Date:   Sun,  6 Aug 2017 22:09:52 -0400
From:   Sinan Kaya <okaya@...eaurora.org>
To:     linux-pci@...r.kernel.org, timur@...eaurora.org,
        alex.williamson@...hat.com
Cc:     linux-arm-msm@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        Sinan Kaya <okaya@...eaurora.org>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        linux-kernel@...r.kernel.org
Subject: [PATCH V8 2/2] PCI: display not responding message while device is unreachable

Adding a print statement into pci_bus_read_dev_vendor_id() so that
user observes the progress of device polling instead of silently
waiting for timeout to be reached.

Signed-off-by: Sinan Kaya <okaya@...eaurora.org>
---
 drivers/pci/probe.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index c31310d..6e4a846 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -1851,9 +1851,15 @@ bool pci_bus_read_dev_vendor_id(struct pci_bus *bus, int devfn, u32 *l,
 		delay *= 2;
 		if (pci_bus_read_config_dword(bus, devfn, PCI_VENDOR_ID, l))
 			return false;
+
+		if (delay > 1000)
+			pr_info("pci %04x:%02x:%02x.%d: not responding\n",
+				pci_domain_nr(bus), bus->number,
+				PCI_SLOT(devfn), PCI_FUNC(devfn));
+
 		/* Card hasn't responded in 60 seconds?  Must be stuck. */
 		if (delay > crs_timeout) {
-			printk(KERN_WARNING "pci %04x:%02x:%02x.%d: not responding\n",
+			pr_warn("pci %04x:%02x:%02x.%d: not responding timeout reached\n",
 			       pci_domain_nr(bus), bus->number, PCI_SLOT(devfn),
 			       PCI_FUNC(devfn));
 			return false;
-- 
1.9.1