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Date:   Fri, 15 Oct 2021 20:09:04 +0530
From:   Naveen Naidu <>
Cc:     Naveen Naidu <>,,,,
        "K. Y. Srinivasan" <>,
        Haiyang Zhang <>,
        Stephen Hemminger <>,
        Wei Liu <>, Dexuan Cui <>,
        Lorenzo Pieralisi <>,
        Rob Herring <>,
        Krzysztof WilczyƄski <>, (open list:Hyper-V/Azure CORE AND DRIVERS)
Subject: [PATCH v2 23/24] PCI: hv: Use PCI_ERROR_RESPONSE to specify hardware read error

Include PCI_ERROR_RESPONSE along with 0xFFFFFFFF in the comment to
specify a hardware error. This helps finding where MMIO read error
occurs easier to find.

Signed-off-by: Naveen Naidu <>
 drivers/pci/controller/pci-hyperv.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/pci/controller/pci-hyperv.c b/drivers/pci/controller/pci-hyperv.c
index 67c46e52c0dc..7e1102e3d7c6 100644
--- a/drivers/pci/controller/pci-hyperv.c
+++ b/drivers/pci/controller/pci-hyperv.c
@@ -1774,7 +1774,7 @@ static void prepopulate_bars(struct hv_pcibus_device *hbus)
 	 * If the memory enable bit is already set, Hyper-V silently ignores
 	 * the below BAR updates, and the related PCI device driver can not
 	 * work, because reading from the device register(s) always returns
-	 * 0xFFFFFFFF.
 	list_for_each_entry(hpdev, &hbus->children, list_entry) {
 		_hv_pcifront_read_config(hpdev, PCI_COMMAND, 2, &command);

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