From: Jisheng Zhang <jszhang@kernel.org>
Date: Sun, 26 Dec 2021 15:49:10 +0800
Subject: PCI: tegra194: Remove unnecessary MSI enable reg save and restore
Git-commit: 571dda6ca5136c1213bd36b9f298d4487e2b6622
Patch-mainline: v5.19-rc1
References: jsc#PED-1763
The integrated MSI Receiver enable register is always initialized in
dw_pcie_setup_rc() which is also called in resume code path, so we
don't need to save/restore the enable register during suspend/resume.
Link: https://lore.kernel.org/r/20211226074910.2722-1-jszhang@kernel.org
Signed-off-by: Jisheng Zhang <jszhang@kernel.org>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Acked-by: Vidya Sagar <vidyas@nvidia.com>
Signed-off-by: Matthias Brugger <mbrugger@suse.com>
---
drivers/pci/controller/dwc/pcie-tegra194.c | 9 ---------
1 file changed, 9 deletions(-)
diff --git a/drivers/pci/controller/dwc/pcie-tegra194.c b/drivers/pci/controller/dwc/pcie-tegra194.c
index b1b5f836a8064..cc26784901627 100644
--- a/drivers/pci/controller/dwc/pcie-tegra194.c
+++ b/drivers/pci/controller/dwc/pcie-tegra194.c
@@ -186,8 +186,6 @@
#define N_FTS_VAL 52
#define FTS_VAL 52
-#define PORT_LOGIC_MSI_CTRL_INT_0_EN 0x828
-
#define GEN3_EQ_CONTROL_OFF 0x8a8
#define GEN3_EQ_CONTROL_OFF_PSET_REQ_VEC_SHIFT 8
#define GEN3_EQ_CONTROL_OFF_PSET_REQ_VEC_MASK GENMASK(23, 8)
@@ -2189,9 +2187,6 @@ static int tegra194_pcie_suspend_noirq(struct device *dev)
if (!pcie->link_state)
return 0;
- /* Save MSI interrupt vector */
- pcie->msi_ctrl_int = dw_pcie_readl_dbi(&pcie->pci,
- PORT_LOGIC_MSI_CTRL_INT_0_EN);
tegra_pcie_downstream_dev_to_D0(pcie);
tegra194_pcie_pme_turnoff(pcie);
tegra_pcie_unconfig_controller(pcie);
@@ -2223,10 +2218,6 @@ static int tegra194_pcie_resume_noirq(struct device *dev)
if (ret < 0)
goto fail_host_init;
- /* Restore MSI interrupt vector */
- dw_pcie_writel_dbi(&pcie->pci, PORT_LOGIC_MSI_CTRL_INT_0_EN,
- pcie->msi_ctrl_int);
-
return 0;
fail_host_init:
--
2.37.3