From: "Pali Rohár" <pali@kernel.org>
To: "Thomas Petazzoni" <thomas.petazzoni@bootlin.com>,
"Lorenzo Pieralisi" <lorenzo.pieralisi@arm.com>,
"Rob Herring" <robh@kernel.org>,
"Krzysztof Wilczyński" <kw@linux.com>,
"Bjorn Helgaas" <bhelgaas@google.com>,
"Marek Behún" <kabel@kernel.org>
Cc: linux-pci@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org
Subject: [PATCH 07/15] PCI: mvebu: Do not modify PCI IO type bits in conf_write
Date: Thu, 25 Nov 2021 13:45:57 +0100 [thread overview]
Message-ID: <20211125124605.25915-8-pali@kernel.org> (raw)
In-Reply-To: <20211125124605.25915-1-pali@kernel.org>
PCI IO type bits are already initialized in mvebu_pci_bridge_emul_init()
function and only when IO support is enabled. These type bits are read-only
and pci-bridge-emul.c code already does not allow to modify them from upper
layers.
When IO support is disabled then all IO registers should be read-only and
return zeros. Therefore do not modify PCI IO type bits in
mvebu_pci_bridge_emul_base_conf_write() callback.
Signed-off-by: Pali Rohár <pali@kernel.org>
Fixes: 1f08673eef12 ("PCI: mvebu: Convert to PCI emulated bridge config space")
Cc: stable@vger.kernel.org
---
drivers/pci/controller/pci-mvebu.c | 7 -------
1 file changed, 7 deletions(-)
diff --git a/drivers/pci/controller/pci-mvebu.c b/drivers/pci/controller/pci-mvebu.c
index 32694763e930..a0b661972436 100644
--- a/drivers/pci/controller/pci-mvebu.c
+++ b/drivers/pci/controller/pci-mvebu.c
@@ -522,13 +522,6 @@ mvebu_pci_bridge_emul_base_conf_write(struct pci_bridge_emul *bridge,
break;
case PCI_IO_BASE:
- /*
- * We keep bit 1 set, it is a read-only bit that
- * indicates we support 32 bits addressing for the
- * I/O
- */
- conf->iobase |= PCI_IO_RANGE_TYPE_32;
- conf->iolimit |= PCI_IO_RANGE_TYPE_32;
mvebu_pcie_handle_iobase_change(port);
break;
--
2.20.1
next prev parent reply other threads:[~2021-11-25 12:50 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-11-25 12:45 [PATCH 00/15] pci: mvebu: Various fixes Pali Rohár
2021-11-25 12:45 ` [PATCH 01/15] PCI: mvebu: Check for valid ports Pali Rohár
2021-11-25 12:45 ` [PATCH 02/15] PCI: mvebu: Check for errors from pci_bridge_emul_init() call Pali Rohár
2021-11-25 12:45 ` [PATCH 03/15] PCI: mvebu: Check that PCI bridge specified in DT has function number zero Pali Rohár
2022-01-07 18:15 ` Bjorn Helgaas
2022-01-07 18:18 ` Pali Rohár
2022-01-07 21:09 ` Bjorn Helgaas
2022-01-07 21:58 ` Pali Rohár
2021-11-25 12:45 ` [PATCH 04/15] PCI: mvebu: Handle invalid size of read config request Pali Rohár
2022-01-07 18:45 ` Bjorn Helgaas
2022-01-07 19:15 ` Russell King (Oracle)
2021-11-25 12:45 ` [PATCH 05/15] PCI: mvebu: Disallow mapping interrupts on emulated bridges Pali Rohár
2022-01-07 21:32 ` Bjorn Helgaas
2022-01-07 22:13 ` Pali Rohár
2022-01-07 23:01 ` Bjorn Helgaas
2022-01-07 23:11 ` Pali Rohár
2021-11-25 12:45 ` [PATCH 06/15] PCI: mvebu: Fix support for bus mastering and PCI_COMMAND on emulated bridge Pali Rohár
2021-11-25 12:45 ` Pali Rohár [this message]
2021-11-25 12:45 ` [PATCH 08/15] PCI: mvebu: Propagate errors when updating PCI_IO_BASE and PCI_MEM_BASE registers Pali Rohár
2022-01-07 21:55 ` Bjorn Helgaas
2022-01-07 22:28 ` Pali Rohár
2022-01-07 23:16 ` Bjorn Helgaas
2022-01-07 23:46 ` Pali Rohár
2022-01-13 0:19 ` Bjorn Helgaas
2022-01-13 10:35 ` Pali Rohár
2022-01-20 17:50 ` Bjorn Helgaas
2022-01-20 19:08 ` Pali Rohár
2022-01-20 19:37 ` Bjorn Helgaas
2021-11-25 12:45 ` [PATCH 09/15] PCI: mvebu: Setup PCIe controller to Root Complex mode Pali Rohár
2021-11-25 12:46 ` [PATCH 10/15] PCI: mvebu: Set PCI Bridge Class Code to PCI Bridge Pali Rohár
2021-11-25 12:46 ` [PATCH 11/15] PCI: mvebu: Fix configuring secondary bus of PCIe Root Port via emulated bridge Pali Rohár
2021-11-25 12:46 ` [PATCH 12/15] PCI: mvebu: Fix support for PCI_BRIDGE_CTL_BUS_RESET on " Pali Rohár
2021-11-25 12:46 ` [PATCH 13/15] PCI: mvebu: Fix support for PCI_EXP_DEVCTL " Pali Rohár
2021-11-25 12:46 ` [PATCH 14/15] PCI: mvebu: Fix support for PCI_EXP_RTSTA " Pali Rohár
2021-11-25 12:46 ` [PATCH 15/15] PCI: mvebu: Fix support for DEVCAP2, DEVCTL2 and LNKCTL2 registers " Pali Rohár
2022-01-04 15:04 ` [PATCH 00/15] pci: mvebu: Various fixes Lorenzo Pieralisi
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