linux-kernel - RE: [PATCH v3 02/26] PCI: hv: Use PCI_STD_NUM

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Date:   Mon, 16 Sep 2019 21:19:08 +0000
From:   Haiyang Zhang <haiyangz@...rosoft.com>
To:     Denis Efremov <efremov@...ux.com>,
        Bjorn Helgaas <bhelgaas@...gle.com>
CC:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
        Andrew Murray <andrew.murray@....com>,
        "linux-hyperv@...r.kernel.org" <linux-hyperv@...r.kernel.org>,
        KY Srinivasan <kys@...rosoft.com>,
        Stephen Hemminger <sthemmin@...rosoft.com>,
        Sasha Levin <sashal@...nel.org>
Subject: RE: [PATCH v3 02/26] PCI: hv: Use PCI_STD_NUM_BARS



> -----Original Message-----
> From: Denis Efremov <efremov@...ux.com>
> Sent: Monday, September 16, 2019 4:42 PM
> To: Bjorn Helgaas <bhelgaas@...gle.com>
> Cc: Denis Efremov <efremov@...ux.com>; linux-kernel@...r.kernel.org;
> linux-pci@...r.kernel.org; Andrew Murray <andrew.murray@....com>;
> linux-hyperv@...r.kernel.org; KY Srinivasan <kys@...rosoft.com>; Haiyang
> Zhang <haiyangz@...rosoft.com>; Stephen Hemminger
> <sthemmin@...rosoft.com>; Sasha Levin <sashal@...nel.org>
> Subject: [PATCH v3 02/26] PCI: hv: Use PCI_STD_NUM_BARS
> 
> Replace the magic constant (6) with define PCI_STD_NUM_BARS
> representing the number of PCI BARs.
> 
> Cc: "K. Y. Srinivasan" <kys@...rosoft.com>
> Cc: Haiyang Zhang <haiyangz@...rosoft.com>
> Cc: Stephen Hemminger <sthemmin@...rosoft.com>
> Cc: Sasha Levin <sashal@...nel.org>
> Signed-off-by: Denis Efremov <efremov@...ux.com>
> ---
>  drivers/pci/controller/pci-hyperv.c | 10 +++++-----
>  1 file changed, 5 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/pci/controller/pci-hyperv.c b/drivers/pci/controller/pci-
> hyperv.c
> index 40b625458afa..1665c23b649f 100644
> --- a/drivers/pci/controller/pci-hyperv.c
> +++ b/drivers/pci/controller/pci-hyperv.c
> @@ -307,7 +307,7 @@ struct pci_bus_relations {  struct
> pci_q_res_req_response {
>  	struct vmpacket_descriptor hdr;
>  	s32 status;			/* negative values are failures */
> -	u32 probed_bar[6];
> +	u32 probed_bar[PCI_STD_NUM_BARS];
>  } __packed;
> 
>  struct pci_set_power {
> @@ -503,7 +503,7 @@ struct hv_pci_dev {
>  	 * What would be observed if one wrote 0xFFFFFFFF to a BAR and
> then
>  	 * read it back, for each of the BAR offsets within config space.
>  	 */
> -	u32 probed_bar[6];
> +	u32 probed_bar[PCI_STD_NUM_BARS];
>  };
> 
>  struct hv_pci_compl {
> @@ -1327,7 +1327,7 @@ static void survey_child_resources(struct
> hv_pcibus_device *hbus)
>  	 * so it's sufficient to just add them up without tracking alignment.
>  	 */
>  	list_for_each_entry(hpdev, &hbus->children, list_entry) {
> -		for (i = 0; i < 6; i++) {
> +		for (i = 0; i < PCI_STD_NUM_BARS; i++) {
>  			if (hpdev->probed_bar[i] &
> PCI_BASE_ADDRESS_SPACE_IO)
>  				dev_err(&hbus->hdev->device,
>  					"There's an I/O BAR in this list!\n");
> @@ -1401,7 +1401,7 @@ static void prepopulate_bars(struct
> hv_pcibus_device *hbus)
>  	/* Pick addresses for the BARs. */
>  	do {
>  		list_for_each_entry(hpdev, &hbus->children, list_entry) {
> -			for (i = 0; i < 6; i++) {
> +			for (i = 0; i < PCI_STD_NUM_BARS; i++) {
>  				bar_val = hpdev->probed_bar[i];
>  				if (bar_val == 0)
>  					continue;
> @@ -1558,7 +1558,7 @@ static void q_resource_requirements(void
> *context, struct pci_response *resp,
>  			"query resource requirements failed: %x\n",
>  			resp->status);
>  	} else {
> -		for (i = 0; i < 6; i++) {
> +		for (i = 0; i < PCI_STD_NUM_BARS; i++) {
>  			completion->hpdev->probed_bar[i] =
>  				q_res_req->probed_bar[i];
>  		}

Reviewed-by: Haiyang Zhang <haiyangz@...rosoft.com>
Thanks.