From: Dongdong Liu <liudongdong3@huawei.com>
To: <helgaas@kernel.org>, <linux-pci@vger.kernel.org>
Cc: <linuxarm@huawei.com>, Dongdong Liu <liudongdong3@huawei.com>
Subject: [PATCH] PCI/LINK: Print IRQ number used by port
Date: Thu, 10 Sep 2020 19:24:15 +0800 [thread overview]
Message-ID: <1599737055-73624-1-git-send-email-liudongdong3@huawei.com> (raw)
Print IRQ number used by PCIe Link Bandwidth Notification services port
as AER, PME and DPC does. It provides convenience to track PCIe BW notif
interrupts counts of certain port from /proc/interrupts.
The dmesg log is as below.
pcieport 0000:00:00.0: bw_notification: enabled with IRQ 1166
Signed-off-by: Dongdong Liu <liudongdong3@huawei.com>
---
drivers/pci/pcie/bw_notification.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/pci/pcie/bw_notification.c b/drivers/pci/pcie/bw_notification.c
index 77e6857..565d23c 100644
--- a/drivers/pci/pcie/bw_notification.c
+++ b/drivers/pci/pcie/bw_notification.c
@@ -14,6 +14,8 @@
* and warns when links become degraded in operation.
*/
+#define dev_fmt(fmt) "bw_notification: " fmt
+
#include "../pci.h"
#include "portdrv.h"
@@ -97,6 +99,7 @@ static int pcie_bandwidth_notification_probe(struct pcie_device *srv)
return ret;
pcie_enable_link_bandwidth_notification(srv->port);
+ pci_info(srv->port, "enabled with IRQ %d\n", srv->irq);
return 0;
}
--
1.9.1
next reply other threads:[~2020-09-10 11:51 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-10 11:24 Dongdong Liu [this message]
2020-09-17 17:01 ` [PATCH] PCI/LINK: Print IRQ number used by port Bjorn Helgaas
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