linux-kernel - Re: [PATCH 2/4] PCI/dwc: Fix the 4GiB outbound window size truncated to zero issue

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Message-ID: <681034bb-f73b-1793-ed48-ff49e8b58cf5@synopsys.com>
Date:   Mon, 5 Nov 2018 12:25:30 +0000
From:   Gustavo Pimentel <gustavo.pimentel@...opsys.com>
To:     "Z.q. Hou" <zhiqiang.hou@....com>,
        "linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "bhelgaas@...gle.com" <bhelgaas@...gle.com>,
        "lorenzo.pieralisi@....com" <lorenzo.pieralisi@....com>,
        "jingoohan1@...il.com" <jingoohan1@...il.com>,
        "gustavo.pimentel@...opsys.com" <gustavo.pimentel@...opsys.com>
CC:     Roy Zang <roy.zang@....com>, Mingkai Hu <mingkai.hu@....com>,
        "M.h. Lian" <minghuan.lian@....com>
Subject: Re: [PATCH 2/4] PCI/dwc: Fix the 4GiB outbound window size truncated
 to zero issue

On 25/10/2018 10:22, Z.q. Hou wrote:
> From: Hou Zhiqiang <Zhiqiang.Hou@....com>
> 
> The current type of mem_size is 'u32', so when resource_size()
> return 4G it will be truncated to zero. This patch fix it by
> changing its type to 'u64'.
> 
> Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@....com>
> ---
>  drivers/pci/controller/dwc/pcie-designware.c | 4 ++--
>  drivers/pci/controller/dwc/pcie-designware.h | 4 ++--
>  2 files changed, 4 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/pci/controller/dwc/pcie-designware.c b/drivers/pci/controller/dwc/pcie-designware.c
> index 2153956a0b20..7ac5989c23ef 100644
> --- a/drivers/pci/controller/dwc/pcie-designware.c
> +++ b/drivers/pci/controller/dwc/pcie-designware.c
> @@ -106,7 +106,7 @@ static void dw_pcie_writel_ob_unroll(struct dw_pcie *pci, u32 index, u32 reg,
>  
>  static void dw_pcie_prog_outbound_atu_unroll(struct dw_pcie *pci, int index,
>  					     int type, u64 cpu_addr,
> -					     u64 pci_addr, u32 size)
> +					     u64 pci_addr, u64 size)
>  {
>  	u32 retries, val;
>  
> @@ -141,7 +141,7 @@ static void dw_pcie_prog_outbound_atu_unroll(struct dw_pcie *pci, int index,
>  }
>  
>  void dw_pcie_prog_outbound_atu(struct dw_pcie *pci, int index, int type,
> -			       u64 cpu_addr, u64 pci_addr, u32 size)
> +			       u64 cpu_addr, u64 pci_addr, u64 size)
>  {
>  	u32 retries, val;
>  
> diff --git a/drivers/pci/controller/dwc/pcie-designware.h b/drivers/pci/controller/dwc/pcie-designware.h
> index 9f1a5e399b70..a438c3879aa9 100644
> --- a/drivers/pci/controller/dwc/pcie-designware.h
> +++ b/drivers/pci/controller/dwc/pcie-designware.h
> @@ -153,7 +153,7 @@ struct pcie_port {
>  	u32			io_size;
>  	u64			mem_base;
>  	phys_addr_t		mem_bus_addr;
> -	u32			mem_size;
> +	u64			mem_size;
>  	struct resource		*cfg;
>  	struct resource		*io;
>  	struct resource		*mem;
> @@ -238,7 +238,7 @@ int dw_pcie_link_up(struct dw_pcie *pci);
>  int dw_pcie_wait_for_link(struct dw_pcie *pci);
>  void dw_pcie_prog_outbound_atu(struct dw_pcie *pci, int index,
>  			       int type, u64 cpu_addr, u64 pci_addr,
> -			       u32 size);
> +			       u64 size);
>  int dw_pcie_prog_inbound_atu(struct dw_pcie *pci, int index, int bar,
>  			     u64 cpu_addr, enum dw_pcie_as_type as_type);
>  void dw_pcie_disable_atu(struct dw_pcie *pci, int index,
> 

Nice catch! :)

Acked-by: Gustavo Pimentel <gustavo.pimentel@...opsys.com>