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SubjectRe: [PATCH v2] PCI: dwc: Use {upper,lower}_32_bits() macros for clarity
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Hi Stephen,

Às 11:25 PM de 12/27/2017, Stephen Boyd escreveu:
> 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
> and provide clarity.
>
> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
> ---
>
> Changes from v1:
> * Update dw_msi_setup_msg() too
> * Reword commit text slightly
>
> drivers/pci/dwc/pcie-designware-host.c | 10 ++++------
> 1 file changed, 4 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/pci/dwc/pcie-designware-host.c b/drivers/pci/dwc/pcie-designware-host.c
> index 81e2157a7cfb..454b8d244071 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)
> @@ -189,8 +187,8 @@ static void dw_msi_setup_msg(struct pcie_port *pp, unsigned int irq, u32 pos)
> else
> msi_target = virt_to_phys((void *)pp->msi_data);
>
> - msg.address_lo = (u32)(msi_target & 0xffffffff);
> - msg.address_hi = (u32)(msi_target >> 32 & 0xffffffff);
> + msg.address_lo = lower_32_bits(msi_target);
> + msg.address_hi = upper_32_bits(msi_target);
>
> if (pp->ops->get_msi_data)
> msg.data = pp->ops->get_msi_data(pp, pos);
>

Thanks for the patch.
Gustavo' patch-set targeting the update of the Interrupt API for
pcie-designware* already does this modification, so I would suggest that we wait
for Gustavo' patch to be stable and get the same modification.

Best regards,
Joao Pinto

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