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From: Richard Zhu <hongxing.zhu@nxp.com>
To: l.stach@pengutronix.de, kw@linux.com, bhelgaas@google.com,
	stefan@agner.ch, lorenzo.pieralisi@arm.com
Cc: linux-pci@vger.kernel.org, linux-imx@nxp.com,
	linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org, kernel@pengutronix.de,
	Richard Zhu <hongxing.zhu@nxp.com>
Subject: [PATCH v2] PCI: imx6: Limit DBI register length for imx6qp PCIe
Date: Sat, 20 Feb 2021 10:49:48 +0800	[thread overview]
Message-ID: <1613789388-2495-2-git-send-email-hongxing.zhu@nxp.com> (raw)
In-Reply-To: <1613789388-2495-1-git-send-email-hongxing.zhu@nxp.com>

Define the length of the DBI registers and limit config space to its
length. This makes sure that the kernel does not access registers beyond
that point that otherwise would lead to an abort on the i.MX 6QuadPlus.

See commit 075af61c19cd ("PCI: imx6: Limit DBI register length") that
resolves a similar issue on the i.MX 6Quad PCIe.

Signed-off-by: Richard Zhu <hongxing.zhu@nxp.com>
Reviewed-by: Lucas Stach <l.stach@pengutronix.de>
Reviewed-by: Krzysztof Wilczyński <kw@linux.com>
---
 drivers/pci/controller/dwc/pci-imx6.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c
index 0cf1333c0440..853ea8e82952 100644
--- a/drivers/pci/controller/dwc/pci-imx6.c
+++ b/drivers/pci/controller/dwc/pci-imx6.c
@@ -1175,6 +1175,7 @@ static const struct imx6_pcie_drvdata drvdata[] = {
 		.variant = IMX6QP,
 		.flags = IMX6_PCIE_FLAG_IMX6_PHY |
 			 IMX6_PCIE_FLAG_IMX6_SPEED_CHANGE,
+		.dbi_length = 0x200,
 	},
 	[IMX7D] = {
 		.variant = IMX7D,
-- 
2.17.1


WARNING: multiple messages have this Message-ID (diff)
From: Richard Zhu <hongxing.zhu@nxp.com>
To: l.stach@pengutronix.de, kw@linux.com, bhelgaas@google.com,
	stefan@agner.ch, lorenzo.pieralisi@arm.com
Cc: Richard Zhu <hongxing.zhu@nxp.com>,
	linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-imx@nxp.com, kernel@pengutronix.de,
	linux-arm-kernel@lists.infradead.org
Subject: [PATCH v2] PCI: imx6: Limit DBI register length for imx6qp PCIe
Date: Sat, 20 Feb 2021 10:49:48 +0800	[thread overview]
Message-ID: <1613789388-2495-2-git-send-email-hongxing.zhu@nxp.com> (raw)
In-Reply-To: <1613789388-2495-1-git-send-email-hongxing.zhu@nxp.com>

Define the length of the DBI registers and limit config space to its
length. This makes sure that the kernel does not access registers beyond
that point that otherwise would lead to an abort on the i.MX 6QuadPlus.

See commit 075af61c19cd ("PCI: imx6: Limit DBI register length") that
resolves a similar issue on the i.MX 6Quad PCIe.

Signed-off-by: Richard Zhu <hongxing.zhu@nxp.com>
Reviewed-by: Lucas Stach <l.stach@pengutronix.de>
Reviewed-by: Krzysztof Wilczyński <kw@linux.com>
---
 drivers/pci/controller/dwc/pci-imx6.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c
index 0cf1333c0440..853ea8e82952 100644
--- a/drivers/pci/controller/dwc/pci-imx6.c
+++ b/drivers/pci/controller/dwc/pci-imx6.c
@@ -1175,6 +1175,7 @@ static const struct imx6_pcie_drvdata drvdata[] = {
 		.variant = IMX6QP,
 		.flags = IMX6_PCIE_FLAG_IMX6_PHY |
 			 IMX6_PCIE_FLAG_IMX6_SPEED_CHANGE,
+		.dbi_length = 0x200,
 	},
 	[IMX7D] = {
 		.variant = IMX7D,
-- 
2.17.1


_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

  reply	other threads:[~2021-02-20  3:02 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-02-20  2:49 [PATCH] PCI: imx6: Limit DBI register length for imx6qp PCIe Richard Zhu
2021-02-20  2:49 ` Richard Zhu
2021-02-20  2:49 ` Richard Zhu [this message]
2021-02-20  2:49   ` [PATCH v2] " Richard Zhu
2021-06-21 14:24   ` Lorenzo Pieralisi
2021-06-21 14:24     ` Lorenzo Pieralisi
2021-06-22  0:41     ` Richard Zhu
2021-06-22  0:41       ` Richard Zhu
2021-06-22  9:28 ` [PATCH] " Lorenzo Pieralisi
2021-06-22  9:28   ` Lorenzo Pieralisi

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