[PATCH v14 10/11] PCI: kirin: fix poweroff sequence
From: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Date: 2021-10-19 06:07:28
Also in:
linux-pci, lkml
Subsystem:
pci native host bridge and endpoint drivers, pci subsystem, pcie driver for hisilicon kirin, the rest · Maintainers:
Lorenzo Pieralisi, Krzysztof Wilczyński, Manivannan Sadhasivam, Bjorn Helgaas, Xiaowei Song, Binghui Wang, Linus Torvalds
This driver currently doesn't call dw_pcie_host_deinit()
at the .remove() callback. This can cause an OOPS if the driver
is unbound.
While here, add a poweroff function, in order to abstract
between the internal and external PHY logic.
Fixes: fc5165db245a ("PCI: kirin: Add HiSilicon Kirin SoC PCIe controller driver")
Cc: stable@vger.kernel.org
Acked-by: Xiaowei Song <songxiaowei@hisilicon.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
---
See [PATCH v14 00/11] at: https://lore.kernel.org/all/cover.1634622716.git.mchehab+huawei@kernel.org/ (local)
drivers/pci/controller/dwc/pcie-kirin.c | 29 ++++++++++++++++---------
1 file changed, 19 insertions(+), 10 deletions(-)
diff --git a/drivers/pci/controller/dwc/pcie-kirin.c b/drivers/pci/controller/dwc/pcie-kirin.c
index 64221a204db2..fea4d717fff3 100644
--- a/drivers/pci/controller/dwc/pcie-kirin.c
+++ b/drivers/pci/controller/dwc/pcie-kirin.c@@ -680,6 +680,22 @@ static const struct dw_pcie_host_ops kirin_pcie_host_ops = { .host_init = kirin_pcie_host_init, }; +static int kirin_pcie_power_off(struct kirin_pcie *kirin_pcie) +{ + int i; + + if (kirin_pcie->type == PCIE_KIRIN_INTERNAL_PHY) + return hi3660_pcie_phy_power_off(kirin_pcie); + + for (i = 0; i < kirin_pcie->n_gpio_clkreq; i++) + gpio_direction_output(kirin_pcie->gpio_id_clkreq[i], 1); + + phy_power_off(kirin_pcie->phy); + phy_exit(kirin_pcie->phy); + + return 0; +} + static int kirin_pcie_power_on(struct platform_device *pdev, struct kirin_pcie *kirin_pcie) {
@@ -725,12 +741,7 @@ static int kirin_pcie_power_on(struct platform_device *pdev, return 0; err: - if (kirin_pcie->type == PCIE_KIRIN_INTERNAL_PHY) { - hi3660_pcie_phy_power_off(kirin_pcie); - } else { - phy_power_off(kirin_pcie->phy); - phy_exit(kirin_pcie->phy); - } + kirin_pcie_power_off(kirin_pcie); return ret; }
@@ -739,11 +750,9 @@ static int __exit kirin_pcie_remove(struct platform_device *pdev) { struct kirin_pcie *kirin_pcie = platform_get_drvdata(pdev); - if (kirin_pcie->type == PCIE_KIRIN_INTERNAL_PHY) - return hi3660_pcie_phy_power_off(kirin_pcie); + dw_pcie_host_deinit(&kirin_pcie->pci->pp); - phy_power_off(kirin_pcie->phy); - phy_exit(kirin_pcie->phy); + kirin_pcie_power_off(kirin_pcie); return 0; }
--
2.31.1