openwrt/target/linux/generic/backport-5.15/850-v5.17-0006-PCI-aardvark-Disable-bus-mastering-when-unbinding-dr.patch
Rui Salvaterra be381a7ac7 kernel: bump 5.15 to 5.15.33
Deleted (upstreamed):
generic/backport-5.15/350-v5.18-MIPS-pgalloc-fix-memory-leak-caused-by-pgd_free.patch [1]
generic/backport-5.15/730-v5.16-hv-utils-add-PTP_1588_CLOCK-to-Kconfig-to-fix-build.patch [2]
generic/pending-5.15/850-0014-PCI-aardvark-Fix-reading-PCI_EXP_RTSTA_PME-bit-on-em.patch [3]
generic/pending-5.15/850-0002-PCI-aardvark-Fix-reading-MSI-interrupt-number.patch [4]

Manually rebased:
generic/pending-5.15/850-0002-PCI-aardvark-Fix-reading-MSI-interrupt-number.patch
ramips/patches-5.15/710-at803x.patch

[1] https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v5.15.33&id=d29cda15cab086d82d692de016f7249545d4b6b4
[2] https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v5.15.33&id=d5aad7d63b1b5c1f3c4b69e12c05e7c7d196fae8
[3] https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v5.15.33&id=ed750e22e44366e264bcdf7b1cf0713f08f7980a
[4] https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v5.15.33&id=0fe94b84c43cfea867e1721606185e8686d7d32f

Signed-off-by: Rui Salvaterra <rsalvaterra@gmail.com>
[Refresh patches again]
[Remove generic/pending-5.15/850-0002-PCI-aardvark-Fix-reading-MSI-interrupt-number.patch]
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
2022-04-09 19:31:46 +02:00

42 lines
1.5 KiB
Diff

From a46f2f6dd4093438d9615dfbf5c0fea2a9835dba Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Pali=20Roh=C3=A1r?= <pali@kernel.org>
Date: Tue, 30 Nov 2021 18:29:08 +0100
Subject: [PATCH] PCI: aardvark: Disable bus mastering when unbinding driver
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Ensure that after driver unbind PCIe cards are not able to forward
memory and I/O requests in the upstream direction.
Link: https://lore.kernel.org/r/20211130172913.9727-7-kabel@kernel.org
Signed-off-by: Pali Rohár <pali@kernel.org>
Signed-off-by: Marek Behún <kabel@kernel.org>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
---
drivers/pci/controller/pci-aardvark.c | 6 ++++++
1 file changed, 6 insertions(+)
--- a/drivers/pci/controller/pci-aardvark.c
+++ b/drivers/pci/controller/pci-aardvark.c
@@ -1683,6 +1683,7 @@ static int advk_pcie_remove(struct platf
{
struct advk_pcie *pcie = platform_get_drvdata(pdev);
struct pci_host_bridge *bridge = pci_host_bridge_from_priv(pcie);
+ u32 val;
int i;
/* Remove PCI bus with all devices */
@@ -1691,6 +1692,11 @@ static int advk_pcie_remove(struct platf
pci_remove_root_bus(bridge->bus);
pci_unlock_rescan_remove();
+ /* Disable Root Bridge I/O space, memory space and bus mastering */
+ val = advk_readl(pcie, PCIE_CORE_CMD_STATUS_REG);
+ val &= ~(PCI_COMMAND_IO | PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER);
+ advk_writel(pcie, val, PCIE_CORE_CMD_STATUS_REG);
+
/* Remove IRQ domains */
advk_pcie_remove_msi_irq_domain(pcie);
advk_pcie_remove_irq_domain(pcie);