From a6e8b946508cda3c3bf0f9b0e133d293dc9754f6 Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Thu, 29 Jul 2021 23:51:52 +0200
Subject: [PATCH] PCI/MSI: Simplify msi_verify_entries()
Patch-mainline: v5.15-rc1
Git-commit: a6e8b946508cda3c3bf0f9b0e133d293dc9754f6
References: jsc#SLE-19359
No point in looping over all entries when 64bit addressing mode is enabled
for nothing.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Marc Zyngier <maz@kernel.org>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Link: https://lore.kernel.org/r/20210729222542.992849326@linutronix.de
Signed-off-by: Oliver Neukum <oneukum@suse.com>
---
drivers/pci/msi.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c
index 95e6ce478c04..b59957c021a8 100644
--- a/drivers/pci/msi.c
+++ b/drivers/pci/msi.c
@@ -613,8 +613,11 @@ static int msi_verify_entries(struct pci_dev *dev)
{
struct msi_desc *entry;
+ if (!dev->no_64bit_msi)
+ return 0;
+
for_each_pci_msi_entry(entry, dev) {
- if (entry->msg.address_hi && dev->no_64bit_msi) {
+ if (entry->msg.address_hi) {
pci_err(dev, "arch assigned 64-bit MSI address %#x%08x but device only supports 32 bits\n",
entry->msg.address_hi, entry->msg.address_lo);
return -EIO;
--
2.26.2