Re: [PATCH v3 01/14] PCI: tegra: Convert to MSI domains

[Jon Hunter]

Hi Marc,

On 20/04/2021 09:39, Marc Zyngier wrote:

...

> The following should hopefully cure it (compile tested only). Please
> let me know.
> 
> 	M.
> 
> diff --git a/drivers/pci/controller/pci-tegra.c b/drivers/pci/controller/pci-tegra.c
> index eaba7b2fab4a..507b23d43ad1 100644
> --- a/drivers/pci/controller/pci-tegra.c
> +++ b/drivers/pci/controller/pci-tegra.c
> @@ -1802,13 +1802,19 @@ static void tegra_pcie_enable_msi(struct tegra_pcie *pcie)
>  {
>  	const struct tegra_pcie_soc *soc = pcie->soc;
>  	struct tegra_msi *msi = &pcie->msi;
> -	u32 reg;
> +	u32 reg, msi_state[INT_PCI_MSI_NR / 32];
> +	int i;
>  
>  	afi_writel(pcie, msi->phys >> soc->msi_base_shift, AFI_MSI_FPCI_BAR_ST);
>  	afi_writel(pcie, msi->phys, AFI_MSI_AXI_BAR_ST);
>  	/* this register is in 4K increments */
>  	afi_writel(pcie, 1, AFI_MSI_BAR_SZ);
>  
> +	/* Restore the MSI allocation state */
> +	bitmap_to_arr32(msi_state, msi->used, INT_PCI_MSI_NR);
> +	for (i = 0; i < ARRAY_SIZE(msi_state); i++)
> +		afi_writel(pcie, msi_state[i], AFI_MSI_EN_VEC(i));
> +
>  	/* and unmask the MSI interrupt */
>  	reg = afi_readl(pcie, AFI_INTR_MASK);
>  	reg |= AFI_INTR_MASK_MSI_MASK;
> 


Thanks, that does fix it indeed!

Tested-by: Jon Hunter <jonathanh@xxxxxxxxxx>

Cheers
Jon

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nvpublic