This is a note to let you know that I've just added the patch titled
PCI: qcom: Fix pipe clock imbalance
to the 5.10-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-pipe-clock-imbalance.patch
and it can be found in the queue-5.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From fdf6a2f533115ec5d4d9629178f8196331f1ac50 Mon Sep 17 00:00:00 2001
From: Johan Hovold <johan+linaro@xxxxxxxxxx>
Date: Fri, 1 Apr 2022 15:33:51 +0200
Subject: PCI: qcom: Fix pipe clock imbalance
From: Johan Hovold <johan+linaro@xxxxxxxxxx>
commit fdf6a2f533115ec5d4d9629178f8196331f1ac50 upstream.
Fix a clock imbalance introduced by ed8cc3b1fc84 ("PCI: qcom: Add support
for SDM845 PCIe controller"), which enables the pipe clock both in init()
and in post_init() but only disables in post_deinit().
Note that the pipe clock was also never disabled in the init() error
paths and that enabling the clock before powering up the PHY looks
questionable.
Link: https://lore.kernel.org/r/20220401133351.10113-1-johan+linaro@xxxxxxxxxx
Fixes: ed8cc3b1fc84 ("PCI: qcom: Add support for SDM845 PCIe controller")
Signed-off-by: Johan Hovold <johan+linaro@xxxxxxxxxx>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@xxxxxxx>
Signed-off-by: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>
Reviewed-by: Bjorn Andersson <bjorn.andersson@xxxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx # 5.6
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/pci/controller/dwc/pcie-qcom.c | 6 ------
1 file changed, 6 deletions(-)
--- a/drivers/pci/controller/dwc/pcie-qcom.c
+++ b/drivers/pci/controller/dwc/pcie-qcom.c
@@ -1192,12 +1192,6 @@ static int qcom_pcie_init_2_7_0(struct q
goto err_disable_clocks;
}
- ret = clk_prepare_enable(res->pipe_clk);
- if (ret) {
- dev_err(dev, "cannot prepare/enable pipe clock\n");
- goto err_disable_clocks;
- }
-
/* configure PCIe to RC mode */
writel(DEVICE_TYPE_RC, pcie->parf + PCIE20_PARF_DEVICE_TYPE);
Patches currently in stable-queue which might be from johan+linaro@xxxxxxxxxx are
queue-5.10/phy-qcom-qmp-fix-pipe-clock-imbalance-on-power-on-fa.patch
queue-5.10/pci-qcom-fix-pipe-clock-imbalance.patch
