From 6f571d5c07d1e9c4c46ec2e9d38138b12db041ab Mon Sep 17 00:00:00 2001
From: Wei Liu <liuwe@microsoft.com>
Date: Thu, 17 Feb 2022 15:42:24 +0000
Subject: [PATCH] pci: add debug output for enabling and disabling MSI-X

This helps debugging MSI-X issues.

Signed-off-by: Wei Liu <liuwe@microsoft.com>
---
 pci/src/msix.rs | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/pci/src/msix.rs b/pci/src/msix.rs
index a9ed04595..73a1fef0d 100644
--- a/pci/src/msix.rs
+++ b/pci/src/msix.rs
@@ -162,6 +162,7 @@ impl MsixConfig {
         // Update interrupt routing
         if old_masked != self.masked || old_enabled != self.enabled {
             if self.enabled && !self.masked {
+                debug!("MSI-X enabled for device 0x{:x}", self.devid);
                 for (idx, table_entry) in self.table_entries.iter().enumerate() {
                     let config = MsiIrqSourceConfig {
                         high_addr: table_entry.msg_addr_hi,
@@ -187,6 +188,7 @@ impl MsixConfig {
                     }
                 }
             } else if old_enabled || !old_masked {
+                debug!("MSI-X disabled for device 0x{:x}", self.devid);
                 if let Err(e) = self.interrupt_source_group.disable() {
                     error!("Failed disabling irq_fd: {:?}", e);
                 }