From: Naveen Naidu <naveennaidu479@gmail.com>
To: bhelgaas@google.com
Cc: "Naveen Naidu" <naveennaidu479@gmail.com>,
linux-kernel-mentees@lists.linuxfoundation.org,
linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org,
skhan@linuxfoundation.org, "K. Y. Srinivasan" <kys@microsoft.com>,
"Haiyang Zhang" <haiyangz@microsoft.com>,
"Stephen Hemminger" <sthemmin@microsoft.com>,
"Wei Liu" <wei.liu@kernel.org>,
"Dexuan Cui" <decui@microsoft.com>,
"Lorenzo Pieralisi" <lorenzo.pieralisi@arm.com>,
"Rob Herring" <robh@kernel.org>,
"Krzysztof Wilczyński" <kw@linux.com>,
linux-hyperv@vger.kernel.org (open list:Hyper-V/Azure CORE AND
DRIVERS)
Subject: [PATCH v3 24/25] PCI: hv: Use PCI_ERROR_RESPONSE to specify hardware read error
Date: Thu, 21 Oct 2021 20:37:49 +0530 [thread overview]
Message-ID: <0cbcf03e6a66aa1092862d3cde22e487855b9c2d.1634825082.git.naveennaidu479@gmail.com> (raw)
In-Reply-To: <cover.1634825082.git.naveennaidu479@gmail.com>
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 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
prev parent reply other threads:[~2021-10-21 15:15 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-21 15:07 [PATCH v3 00/25] Unify PCI error response checking Naveen Naidu
2021-10-21 15:07 ` [PATCH v3 01/25] PCI: Add PCI_ERROR_RESPONSE and it's related definitions Naveen Naidu
2021-10-21 16:08 ` Pali Rohár
2021-11-17 23:58 ` Bjorn Helgaas
2021-11-18 13:30 ` Naveen Naidu
2021-10-21 15:07 ` [PATCH v3 02/25] PCI: Set error response in config access defines when ops->read() fails Naveen Naidu
2021-10-21 15:59 ` Pali Rohár
2021-10-21 15:07 ` Naveen Naidu [this message]
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