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,
"Shawn Lin" <shawn.lin@rock-chips.com>,
"Lorenzo Pieralisi" <lorenzo.pieralisi@arm.com>,
"Rob Herring" <robh@kernel.org>,
"Krzysztof Wilczyński" <kw@linux.com>,
"Heiko Stuebner" <heiko@sntech.de>,
linux-rockchip@lists.infradead.org (open list:PCIE DRIVER FOR
ROCKCHIP),
linux-arm-kernel@lists.infradead.org (moderated
list:ARM/Rockchip SoC support)
Subject: [PATCH 13/22] PCI: rockchip: Use SET_PCI_ERROR_RESPONSE() when device not found
Date: Mon, 11 Oct 2021 23:32:57 +0530 [thread overview]
Message-ID: <11cbd327beeed70c6db69aad4eeafe28ade4ecb3.1633972263.git.naveennaidu479@gmail.com> (raw)
In-Reply-To: <cover.1633972263.git.naveennaidu479@gmail.com>
An MMIO read from a PCI device that doesn't exist or doesn't respond
causes a PCI error. There's no real data to return to satisfy the
CPU read, so most hardware fabricates ~0 data.
Use SET_PCI_ERROR_RESPONSE() to set the error response, when a faulty
read occurs.
This helps unify PCI error response checking and make error check
consistent and easier to find.
Compile tested only.
Signed-off-by: Naveen Naidu <naveennaidu479@gmail.com>
---
drivers/pci/controller/pcie-rockchip-host.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/pci/controller/pcie-rockchip-host.c b/drivers/pci/controller/pcie-rockchip-host.c
index c52316d0bfd2..f5d718700d59 100644
--- a/drivers/pci/controller/pcie-rockchip-host.c
+++ b/drivers/pci/controller/pcie-rockchip-host.c
@@ -222,7 +222,7 @@ static int rockchip_pcie_rd_conf(struct pci_bus *bus, u32 devfn, int where,
struct rockchip_pcie *rockchip = bus->sysdata;
if (!rockchip_pcie_valid_device(rockchip, bus, PCI_SLOT(devfn))) {
- *val = 0xffffffff;
+ SET_PCI_ERROR_RESPONSE(val);
return PCIBIOS_DEVICE_NOT_FOUND;
}
--
2.25.1
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next prev parent reply other threads:[~2021-10-11 18:06 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-11 17:35 [PATCH 00/22] PCI: Unify PCI error response checking Naveen Naidu
2021-10-11 17:37 ` [PATCH 01/22] PCI: Add PCI_ERROR_RESPONSE and it's related defintions Naveen Naidu
2021-10-11 17:45 ` [PATCH 03/22] PCI: thunder: Use SET_PCI_ERROR_RESPONSE() when device not found Naveen Naidu
2021-10-11 17:46 ` [PATCH 04/22] PCI: iproc: " Naveen Naidu
2021-10-11 17:51 ` [PATCH 05/22] PCI: mediatek: " Naveen Naidu
2021-10-11 17:52 ` [PATCH 06/22] PCI: exynos: " Naveen Naidu
2021-10-11 17:56 ` [PATCH 09/22] PCI: aardvark: " Naveen Naidu
2021-10-11 18:08 ` Pali Rohár
2021-10-11 18:28 ` Naveen Naidu
[not found] ` <20211011182526.kboaxqofdpd2jjrl@theprophet>
2021-10-11 18:41 ` Pali Rohár
2021-10-12 15:59 ` Naveen Naidu
2021-10-13 2:13 ` Bjorn Helgaas
2021-10-13 17:59 ` Pali Rohár
2021-10-11 18:00 ` [PATCH 10/22] PCI: mvebu: " Naveen Naidu
2021-10-11 18:02 ` Naveen Naidu [this message]
2021-10-11 18:13 ` [PATCH 22/22] PCI: xgene: Use PCI_ERROR_RESPONSE to specify hardware error Naveen Naidu
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