linux-kernel - Re: [PATCH V3 1/2] PCI: dwc: Add API support to de-initialize host

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Date:   Thu, 2 May 2019 12:36:48 +0530
From:   Vidya Sagar <vidyas@...dia.com>
To:     <jingoohan1@...il.com>, <gustavo.pimentel@...opsys.com>,
        <lorenzo.pieralisi@....com>, <bhelgaas@...gle.com>,
        <Jisheng.Zhang@...aptics.com>, <thierry.reding@...il.com>
CC:     <linux-pci@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <kthota@...dia.com>, <mmaddireddy@...dia.com>, <sagar.tv@...il.com>
Subject: Re: [PATCH V3 1/2] PCI: dwc: Add API support to de-initialize host

On 4/23/2019 10:19 AM, Vidya Sagar wrote:
> Add an API to group all the tasks to be done to de-initialize host which
> can then be called by any DesignWare core based driver implementations
> while adding .remove() support in their respective drivers.
> 
> Signed-off-by: Vidya Sagar <vidyas@...dia.com>
> Acked-by: Gustavo Pimentel <gustavo.pimentel@...opsys.com>
> ---
> v3:
> * Rebased on top of linux-next top of the tree branch
> 
> v2:
> * s/Designware/DesignWare
> 
>   drivers/pci/controller/dwc/pcie-designware-host.c | 7 +++++++
>   drivers/pci/controller/dwc/pcie-designware.h      | 5 +++++
>   2 files changed, 12 insertions(+)
> 
> diff --git a/drivers/pci/controller/dwc/pcie-designware-host.c b/drivers/pci/controller/dwc/pcie-designware-host.c
> index 77db32529319..f87c9542eb09 100644
> --- a/drivers/pci/controller/dwc/pcie-designware-host.c
> +++ b/drivers/pci/controller/dwc/pcie-designware-host.c
> @@ -496,6 +496,13 @@ int dw_pcie_host_init(struct pcie_port *pp)
>   	return ret;
>   }
>   
> +void dw_pcie_host_deinit(struct pcie_port *pp)
> +{
> +	pci_stop_root_bus(pp->root_bus);
> +	pci_remove_root_bus(pp->root_bus);
> +	dw_pcie_free_msi(pp);
> +}
> +
>   static int dw_pcie_access_other_conf(struct pcie_port *pp, struct pci_bus *bus,
>   				     u32 devfn, int where, int size, u32 *val,
>   				     bool write)
> diff --git a/drivers/pci/controller/dwc/pcie-designware.h b/drivers/pci/controller/dwc/pcie-designware.h
> index deab426affd3..4f48ec78c7b9 100644
> --- a/drivers/pci/controller/dwc/pcie-designware.h
> +++ b/drivers/pci/controller/dwc/pcie-designware.h
> @@ -348,6 +348,7 @@ void dw_pcie_msi_init(struct pcie_port *pp);
>   void dw_pcie_free_msi(struct pcie_port *pp);
>   void dw_pcie_setup_rc(struct pcie_port *pp);
>   int dw_pcie_host_init(struct pcie_port *pp);
> +void dw_pcie_host_deinit(struct pcie_port *pp);
>   int dw_pcie_allocate_domains(struct pcie_port *pp);
>   #else
>   static inline irqreturn_t dw_handle_msi_irq(struct pcie_port *pp)
> @@ -372,6 +373,10 @@ static inline int dw_pcie_host_init(struct pcie_port *pp)
>   	return 0;
>   }
>   
> +static inline void dw_pcie_host_deinit(struct pcie_port *pp)
> +{
> +}
> +
>   static inline int dw_pcie_allocate_domains(struct pcie_port *pp)
>   {
>   	return 0;
> 

Hi Lorenzo,
Can you please review this patch series?

Thanks,
Vidya Sagar