FAILED: patch "[PATCH] PCI: imx6: Add IMX8MM_EP and IMX8MP_EP fixed 256-byte BAR 4" failed to apply to 6.6-stable tree

FAILED: patch "[PATCH] PCI: imx6: Add IMX8MM_EP and IMX8MP_EP fixed 256-byte BAR 4" failed to apply to 6.6-stable tree

[gregkh]

The patch below does not apply to the 6.6-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable@vger.kernel.org>.

To reproduce the conflict and resubmit, you may use the following commands:

git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.6.y
git checkout FETCH_HEAD
git cherry-pick -x 399444a87acdea5d21c218bc8e9b621fea1cd218
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<stable@vger.kernel.org>' --in-reply-to '2025082152-acetone-swept-9f05@gregkh' --subject-prefix 'PATCH 6.6.y' HEAD^..

Possible dependencies:



thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From 399444a87acdea5d21c218bc8e9b621fea1cd218 Mon Sep 17 00:00:00 2001
From: Richard Zhu <hongxing.zhu@nxp.com>
Date: Tue, 8 Jul 2025 17:10:03 +0800
Subject: [PATCH] PCI: imx6: Add IMX8MM_EP and IMX8MP_EP fixed 256-byte BAR 4
 in epc_features

For IMX8MM_EP and IMX8MP_EP, add fixed 256-byte BAR 4 and reserved BAR 5
in imx8m_pcie_epc_features.

Fixes: 75c2f26da03f ("PCI: imx6: Add i.MX PCIe EP mode support")
Signed-off-by: Richard Zhu <hongxing.zhu@nxp.com>
[bhelgaas: add details in subject]
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Cc: stable@vger.kernel.org
Link: https://patch.msgid.link/20250708091003.2582846-3-hongxing.zhu@nxp.com

diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c
index 7d15bcb7c107..9754cc6e09b9 100644
--- a/drivers/pci/controller/dwc/pci-imx6.c
+++ b/drivers/pci/controller/dwc/pci-imx6.c
@@ -1385,6 +1385,8 @@ static const struct pci_epc_features imx8m_pcie_epc_features = {
 	.msix_capable = false,
 	.bar[BAR_1] = { .type = BAR_RESERVED, },
 	.bar[BAR_3] = { .type = BAR_RESERVED, },
+	.bar[BAR_4] = { .type = BAR_FIXED, .fixed_size = SZ_256, },
+	.bar[BAR_5] = { .type = BAR_RESERVED, },
 	.align = SZ_64K,
 };
 

[PATCH 6.6.y] PCI: imx6: Add IMX8MM_EP and IMX8MP_EP fixed 256-byte BAR 4 in epc_features

[Sasha Levin]

From: Richard Zhu <hongxing.zhu@nxp.com>

[ Upstream commit 399444a87acdea5d21c218bc8e9b621fea1cd218 ]

For IMX8MM_EP and IMX8MP_EP, add fixed 256-byte BAR 4 and reserved BAR 5
in imx8m_pcie_epc_features.

Fixes: 75c2f26da03f ("PCI: imx6: Add i.MX PCIe EP mode support")
Signed-off-by: Richard Zhu <hongxing.zhu@nxp.com>
[bhelgaas: add details in subject]
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Cc: stable@vger.kernel.org
Link: https://patch.msgid.link/20250708091003.2582846-3-hongxing.zhu@nxp.com
[ Adapted BAR configuration to use reserved_bar bitmap and bar_fixed_size ]
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/pci/controller/dwc/pci-imx6.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c
index cedfbd425863..bddec814b826 100644
--- a/drivers/pci/controller/dwc/pci-imx6.c
+++ b/drivers/pci/controller/dwc/pci-imx6.c
@@ -1043,7 +1043,10 @@ static const struct pci_epc_features imx8m_pcie_epc_features = {
 	.linkup_notifier = false,
 	.msi_capable = true,
 	.msix_capable = false,
-	.reserved_bar = 1 << BAR_1 | 1 << BAR_3,
+	.reserved_bar = 1 << BAR_1 | 1 << BAR_3 | 1 << BAR_5,
+	.bar_fixed_size = {
+		[BAR_4] = SZ_256,
+	},
 	.align = SZ_64K,
 };
 
-- 
2.50.1