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From: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
To: Jiri Slaby <jslaby@suse.cz>
Cc: jingoohan1@gmail.com, gustavo.pimentel@synopsys.com,
	amurray@thegoodpenguin.co.uk, bhelgaas@google.com,
	linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org,
	Kishon Vijay Abraham I <kishon@ti.com>
Subject: Re: [PATCH] PCI: dwc: clean up computing of msix_tbl
Date: Tue, 5 May 2020 10:57:23 +0100	[thread overview]
Message-ID: <20200505095723.GB12543@e121166-lin.cambridge.arm.com> (raw)
In-Reply-To: <20200420065227.4920-1-jslaby@suse.cz>

On Mon, Apr 20, 2020 at 08:52:27AM +0200, Jiri Slaby wrote:
> Commit 6f5e193bfb55 ("PCI: dwc: Fix dw_pcie_ep_raise_msix_irq() to get
> correct MSI-X table address") overcomplicated the computation of the
> msix_tbl address. Simplify it as it's simply the addr + offset. Provided
> addr is (void *) already.
> 
> objdump -d shows no difference after this patch.
> 
> Signed-off-by: Jiri Slaby <jslaby@suse.cz>
> Cc: Kishon Vijay Abraham I <kishon@ti.com>
> Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
> ---
>  drivers/pci/controller/dwc/pcie-designware-ep.c | 6 +-----
>  1 file changed, 1 insertion(+), 5 deletions(-)

Applied to pci/dwc, thanks !

Lorenzo

> diff --git a/drivers/pci/controller/dwc/pcie-designware-ep.c b/drivers/pci/controller/dwc/pcie-designware-ep.c
> index 1cdcbd102ce8..c815d36905b6 100644
> --- a/drivers/pci/controller/dwc/pcie-designware-ep.c
> +++ b/drivers/pci/controller/dwc/pcie-designware-ep.c
> @@ -433,7 +433,6 @@ int dw_pcie_ep_raise_msix_irq(struct dw_pcie_ep *ep, u8 func_no,
>  	struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
>  	struct pci_epf_msix_tbl *msix_tbl;
>  	struct pci_epc *epc = ep->epc;
> -	struct pci_epf_bar *epf_bar;
>  	u32 reg, msg_data, vec_ctrl;
>  	unsigned int aligned_offset;
>  	u32 tbl_offset;
> @@ -446,10 +445,7 @@ int dw_pcie_ep_raise_msix_irq(struct dw_pcie_ep *ep, u8 func_no,
>  	bir = (tbl_offset & PCI_MSIX_TABLE_BIR);
>  	tbl_offset &= PCI_MSIX_TABLE_OFFSET;
>  
> -	epf_bar = ep->epf_bar[bir];
> -	msix_tbl = epf_bar->addr;
> -	msix_tbl = (struct pci_epf_msix_tbl *)((char *)msix_tbl + tbl_offset);
> -
> +	msix_tbl = ep->epf_bar[bir]->addr + tbl_offset;
>  	msg_addr = msix_tbl[(interrupt_num - 1)].msg_addr;
>  	msg_data = msix_tbl[(interrupt_num - 1)].msg_data;
>  	vec_ctrl = msix_tbl[(interrupt_num - 1)].vector_ctrl;
> -- 
> 2.26.1
> 

      reply	other threads:[~2020-05-05  9:57 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-04-20  6:52 Jiri Slaby
2020-05-05  9:57 ` Lorenzo Pieralisi [this message]

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