This is a note to let you know that I've just added the patch titled
PCI: qcom: Fix IPQ8074 enumeration
to the 6.1-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
pci-qcom-fix-ipq8074-enumeration.patch
and it can be found in the queue-6.1 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 6a878a54d0053ef21f3b829dc267487c2302b012 Mon Sep 17 00:00:00 2001
From: Sricharan Ramabadhran <quic_srichara@xxxxxxxxxxx>
Date: Tue, 19 Sep 2023 15:59:48 +0530
Subject: PCI: qcom: Fix IPQ8074 enumeration
From: Sricharan Ramabadhran <quic_srichara@xxxxxxxxxxx>
commit 6a878a54d0053ef21f3b829dc267487c2302b012 upstream.
PARF_SLV_ADDR_SPACE_SIZE_2_3_3 is used by qcom_pcie_post_init_2_3_3().
This PCIe slave address space size register offset is 0x358 but was
incorrectly changed to 0x16c by 39171b33f652 ("PCI: qcom: Remove PCIE20_
prefix from register definitions").
This prevented access to slave address space registers like iATU, etc.,
so the IPQ8074 PCIe controller was not enumerated.
Revert back to the correct 0x358 offset and remove the unused
PARF_SLV_ADDR_SPACE_SIZE_2_3_3.
Fixes: 39171b33f652 ("PCI: qcom: Remove PCIE20_ prefix from register definitions")
Link: https://lore.kernel.org/r/20230919102948.1844909-1-quic_srichara@xxxxxxxxxxx
Tested-by: Robert Marko <robimarko@xxxxxxxxx>
Signed-off-by: Sricharan Ramabadhran <quic_srichara@xxxxxxxxxxx>
[bhelgaas: commit log]
Signed-off-by: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>
Reviewed-by: Manivannan Sadhasivam <mani@xxxxxxxxxx>
Reviewed-by: Konrad Dybcio <konrad.dybcio@xxxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx # v6.4+
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/pci/controller/dwc/pcie-qcom.c | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)
--- a/drivers/pci/controller/dwc/pcie-qcom.c
+++ b/drivers/pci/controller/dwc/pcie-qcom.c
@@ -40,7 +40,6 @@
#define PARF_PHY_REFCLK 0x4c
#define PARF_CONFIG_BITS 0x50
#define PARF_DBI_BASE_ADDR 0x168
-#define PARF_SLV_ADDR_SPACE_SIZE_2_3_3 0x16c /* Register offset specific to IP ver 2.3.3 */
#define PARF_MHI_CLOCK_RESET_CTRL 0x174
#define PARF_AXI_MSTR_WR_ADDR_HALT 0x178
#define PARF_AXI_MSTR_WR_ADDR_HALT_V2 0x1a8
@@ -1148,8 +1147,7 @@ static int qcom_pcie_post_init_2_3_3(str
u16 offset = dw_pcie_find_capability(pci, PCI_CAP_ID_EXP);
u32 val;
- writel(SLV_ADDR_SPACE_SZ,
- pcie->parf + PARF_SLV_ADDR_SPACE_SIZE_2_3_3);
+ writel(SLV_ADDR_SPACE_SZ, pcie->parf + PARF_SLV_ADDR_SPACE_SIZE);
val = readl(pcie->parf + PARF_PHY_CTRL);
val &= ~BIT(0);
Patches currently in stable-queue which might be from quic_srichara@xxxxxxxxxxx are
queue-6.1/pci-qcom-fix-ipq8074-enumeration.patch
