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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,
	"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 v2 23/24] PCI: hv: Use PCI_ERROR_RESPONSE to specify hardware read error
Date: Fri, 15 Oct 2021 20:09:04 +0530	[thread overview]
Message-ID: <9b72268025063f0094880f32f391e2f626f62487.1634306198.git.naveennaidu479@gmail.com> (raw)
In-Reply-To: <cover.1634306198.git.naveennaidu479@gmail.com>

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 <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


  parent reply	other threads:[~2021-10-15 14:47 UTC|newest]

Thread overview: 39+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-10-15 14:35 [PATCH v2 00/24] Unify PCI error response checking Naveen Naidu
2021-10-15 14:28 ` [PATCH v2 01/24] PCI: Add PCI_ERROR_RESPONSE and it's related definitions Naveen Naidu
2021-10-20 13:24   ` Rob Herring
2021-10-15 14:28 ` [PATCH v2 02/24] PCI: Set error response in config access defines when ops->read() fails Naveen Naidu
2021-10-20 13:41   ` Rob Herring
2021-10-20 13:52   ` Pali Rohár
2021-10-20 15:13     ` Naveen Naidu
2021-10-15 14:38 ` [PATCH v2 03/24] PCI: Unify PCI error response checking Naveen Naidu
2021-10-20 13:13   ` Rob Herring
2021-10-20 15:15     ` Naveen Naidu
2021-10-15 14:38 ` [PATCH v2 04/24] PCI: Remove redundant error fabrication when device read fails Naveen Naidu
2021-10-20 13:42   ` Rob Herring
2021-10-15 14:38 ` [PATCH v2 05/24] PCI: thunder: " Naveen Naidu
2021-10-15 14:38 ` [PATCH v2 06/24] PCI: iproc: " Naveen Naidu
2021-10-15 16:49   ` Ray Jui
2021-10-15 17:05     ` Naveen Naidu
2021-10-15 14:38 ` [PATCH v2 07/24] PCI: mediatek: " Naveen Naidu
2021-10-15 14:38 ` [PATCH v2 08/24] PCI: exynos: " Naveen Naidu
2021-10-15 14:38 ` [PATCH v2 09/24] PCI: histb: " Naveen Naidu
2021-10-15 14:38 ` [PATCH v2 10/24] PCI: kirin: " Naveen Naidu
2021-10-15 14:38 ` [PATCH v2 11/24] PCI: aardvark: " Naveen Naidu
2021-10-15 14:38 ` [PATCH v2 12/24] PCI: mvebu: " Naveen Naidu
2021-10-15 14:38 ` [PATCH v2 13/24] PCI: altera: " Naveen Naidu
2021-10-15 14:38 ` [PATCH v2 14/24] PCI: rcar: " Naveen Naidu
2021-10-18 11:32   ` Geert Uytterhoeven
2021-10-18 11:51     ` Naveen Naidu
2021-10-18 12:00       ` Geert Uytterhoeven
2021-10-15 14:38 ` [PATCH v2 15/24] PCI: rockchip: " Naveen Naidu
2021-10-15 14:38 ` [PATCH v2 16/24] PCI/ERR: Use RESPONSE_IS_PCI_ERROR() to check read from hardware Naveen Naidu
2021-10-15 14:38 ` [PATCH v2 17/24] PCI: vmd: " Naveen Naidu
2021-10-15 14:52   ` Naveen Naidu
2021-10-15 14:38 ` [PATCH v2 18/24] PCI: pciehp: " Naveen Naidu
2021-10-15 15:15   ` Naveen Naidu
2021-10-15 14:39 ` [PATCH v2 19/24] PCI/DPC: " Naveen Naidu
2021-10-15 14:39 ` [PATCH v2 20/24] PCI/PME: " Naveen Naidu
2021-10-15 14:39 ` [PATCH v2 21/24] PCI: cpqphp: " Naveen Naidu
2021-10-15 14:39 ` [PATCH v2 22/24] PCI: keystone: Use PCI_ERROR_RESPONSE to specify hardware error Naveen Naidu
2021-10-15 14:39 ` Naveen Naidu [this message]
2021-10-15 14:39 ` [PATCH v2 24/24] PCI: xgene: " Naveen Naidu

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