Messages in this thread Patch in this message | | | From | Naveen Naidu <> | Subject | [PATCH v4 24/25] PCI: hv: Use PCI_ERROR_RESPONSE to specify hardware read error | Date | Thu, 18 Nov 2021 19:33:34 +0530 |
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Include PCI_ERROR_RESPONSE along with 0xFFFFFFFF in the comment to specify a hardware error. This makes MMIO read errors easier to find.
Signed-off-by: Naveen Naidu <naveennaidu479@gmail.com> --- 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 6733cb14e775..1f961d0b5d6b 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. + * 0xFFFFFFFF (PCI_ERROR_RESPONSE). */ list_for_each_entry(hpdev, &hbus->children, list_entry) { _hv_pcifront_read_config(hpdev, PCI_COMMAND, 2, &command); -- 2.25.1
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