PCI: dwc: Use {upper,lower}_32_bits() macros for clarity

Message ID 20171129005334.16425-1-sboyd@codeaurora.org
State Changes Requested
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Series
  • PCI: dwc: Use {upper,lower}_32_bits() macros for clarity
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Commit Message

Stephen Boyd Nov. 29, 2017, 12:53 a.m.
We have macros for getting the upper or lower 32 bits of a
number. Use them here to shave a couple lines off the code.

Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
---
 drivers/pci/dwc/pcie-designware-host.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

Comments

Jingoo Han Nov. 29, 2017, 11:48 p.m. | #1
On Tuesday, November 28, 2017 7:54 PM, Stephen Boyd wrote:
> 
> We have macros for getting the upper or lower 32 bits of a
> number. Use them here to shave a couple lines off the code.
> 
> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>

Acked-by: Jingoo Han <jingoohan1@gmail.com>

Best regards,
Jingoo Han

> ---
>  drivers/pci/dwc/pcie-designware-host.c | 6 ++----
>  1 file changed, 2 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/pci/dwc/pcie-designware-host.c
> b/drivers/pci/dwc/pcie-designware-host.c
> index 157621175147..ae5abfddf8de 100644
> --- a/drivers/pci/dwc/pcie-designware-host.c
> +++ b/drivers/pci/dwc/pcie-designware-host.c
> @@ -89,10 +89,8 @@ void dw_pcie_msi_init(struct pcie_port *pp)
>  	msi_target = virt_to_phys((void *)pp->msi_data);
> 
>  	/* program the msi_data */
> -	dw_pcie_wr_own_conf(pp, PCIE_MSI_ADDR_LO, 4,
> -			    (u32)(msi_target & 0xffffffff));
> -	dw_pcie_wr_own_conf(pp, PCIE_MSI_ADDR_HI, 4,
> -			    (u32)(msi_target >> 32 & 0xffffffff));
> +	dw_pcie_wr_own_conf(pp, PCIE_MSI_ADDR_LO, 4,
> lower_32_bits(msi_target));
> +	dw_pcie_wr_own_conf(pp, PCIE_MSI_ADDR_HI, 4,
> upper_32_bits(msi_target));
>  }
> 
>  static void dw_pcie_msi_clear_irq(struct pcie_port *pp, int irq)
> --
> The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
> a Linux Foundation Collaborative Project
Lorenzo Pieralisi Dec. 11, 2017, 10:19 a.m. | #2
On Tue, Nov 28, 2017 at 04:53:34PM -0800, Stephen Boyd wrote:
> We have macros for getting the upper or lower 32 bits of a
> number. Use them here to shave a couple lines off the code.
> 
> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
> ---
>  drivers/pci/dwc/pcie-designware-host.c | 6 ++----
>  1 file changed, 2 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/pci/dwc/pcie-designware-host.c b/drivers/pci/dwc/pcie-designware-host.c
> index 157621175147..ae5abfddf8de 100644
> --- a/drivers/pci/dwc/pcie-designware-host.c
> +++ b/drivers/pci/dwc/pcie-designware-host.c
> @@ -89,10 +89,8 @@ void dw_pcie_msi_init(struct pcie_port *pp)
>  	msi_target = virt_to_phys((void *)pp->msi_data);
>  
>  	/* program the msi_data */
> -	dw_pcie_wr_own_conf(pp, PCIE_MSI_ADDR_LO, 4,
> -			    (u32)(msi_target & 0xffffffff));
> -	dw_pcie_wr_own_conf(pp, PCIE_MSI_ADDR_HI, 4,
> -			    (u32)(msi_target >> 32 & 0xffffffff));
> +	dw_pcie_wr_own_conf(pp, PCIE_MSI_ADDR_LO, 4, lower_32_bits(msi_target));
> +	dw_pcie_wr_own_conf(pp, PCIE_MSI_ADDR_HI, 4, upper_32_bits(msi_target));
>  }

Hi Stephen,

I was about to apply it but I think that for consistency it would be
better to convert to {lower,upper}_32_bits() also code in
dw_msi_setup_msg() and slightly reword the log accordingly; if you do
not mind sending a v2 with those changes I will apply then.

Thanks,
Lorenzo

Patch

diff --git a/drivers/pci/dwc/pcie-designware-host.c b/drivers/pci/dwc/pcie-designware-host.c
index 157621175147..ae5abfddf8de 100644
--- a/drivers/pci/dwc/pcie-designware-host.c
+++ b/drivers/pci/dwc/pcie-designware-host.c
@@ -89,10 +89,8 @@  void dw_pcie_msi_init(struct pcie_port *pp)
 	msi_target = virt_to_phys((void *)pp->msi_data);
 
 	/* program the msi_data */
-	dw_pcie_wr_own_conf(pp, PCIE_MSI_ADDR_LO, 4,
-			    (u32)(msi_target & 0xffffffff));
-	dw_pcie_wr_own_conf(pp, PCIE_MSI_ADDR_HI, 4,
-			    (u32)(msi_target >> 32 & 0xffffffff));
+	dw_pcie_wr_own_conf(pp, PCIE_MSI_ADDR_LO, 4, lower_32_bits(msi_target));
+	dw_pcie_wr_own_conf(pp, PCIE_MSI_ADDR_HI, 4, upper_32_bits(msi_target));
 }
 
 static void dw_pcie_msi_clear_irq(struct pcie_port *pp, int irq)