linux-kernel - [PATCH 5.12 036/677] PCI: keystone: Let AM65 use the pci

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Message-Id: <20210512144838.414882629@linuxfoundation.org>
Date:   Wed, 12 May 2021 16:41:22 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Kishon Vijay Abraham I <kishon@...com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Krzysztof Wilczyński <kw@...ux.com>
Subject: [PATCH 5.12 036/677] PCI: keystone: Let AM65 use the pci_ops defined in pcie-designware-host.c

From: Kishon Vijay Abraham I <kishon@...com>

commit 3d0b2a3a87ce5ae85de46c4241afd52ab8b566fe upstream.

Both TI's AM65x (K3) and TI's K2 PCIe driver are implemented in
pci-keystone. However Only K2 PCIe driver should use it's own pci_ops
for configuration space accesses. But commit 10a797c6e54a
("PCI: dwc: keystone: Use pci_ops for config space accessors") used
custom pci_ops for both AM65x and K2. This breaks configuration space
access for AM65x platform. Fix it here.

Link: https://lore.kernel.org/r/20210317131518.11040-1-kishon@ti.com
Fixes: 10a797c6e54a ("PCI: dwc: keystone: Use pci_ops for config space accessors")
Signed-off-by: Kishon Vijay Abraham I <kishon@...com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@....com>
Reviewed-by: Krzysztof Wilczyński <kw@...ux.com>
Cc: <stable@...r.kernel.org> # v5.10
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/pci/controller/dwc/pci-keystone.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/drivers/pci/controller/dwc/pci-keystone.c
+++ b/drivers/pci/controller/dwc/pci-keystone.c
@@ -798,7 +798,8 @@ static int __init ks_pcie_host_init(stru
 	int ret;
 
 	pp->bridge->ops = &ks_pcie_ops;
-	pp->bridge->child_ops = &ks_child_pcie_ops;
+	if (!ks_pcie->is_am6)
+		pp->bridge->child_ops = &ks_child_pcie_ops;
 
 	ret = ks_pcie_config_legacy_irq(ks_pcie);
 	if (ret)