[PATCH v2 23/24] PCI: hv: Use PCI_ERROR_RESPONSE to specify hardware read error
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STALE1817d
SUPERSEDED
From: Naveen Naidu <hidden>
Date: 2021-10-15 14:47:42
Also in:
linux-kernel-mentees, linux-pci, lkml
Subsystem:
hyper-v/azure core and drivers, pci native host bridge and endpoint drivers, pci subsystem, the rest · Maintainers:
"K. Y. Srinivasan", Haiyang Zhang, Wei Liu, Dexuan Cui, Long Li, Lorenzo Pieralisi, Krzysztof Wilczyński, Manivannan Sadhasivam, Bjorn Helgaas, Linus Torvalds
Revision v2 of 3 in this series.
Revisions (3)
- v2 current
- v3 [diff vs current]
- v4 [diff vs current]
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 <redacted> --- 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. + * 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