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From: Gustavo Pimentel <gustavo.pimentel@synopsys.com>
To: bhelgaas@google.com, lorenzo.pieralisi@arm.com,
	Joao.Pinto@synopsys.com, jingoohan1@gmail.com, kishon@ti.com,
	robh+dt@kernel.org, mark.rutland@arm.com
Cc: linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org,
	devicetree@vger.kernel.org, gustavo.pimentel@synopsys.com
Subject: [PATCH 7/8] PCI: dwc: Small computation improvement
Date: Wed, 28 Mar 2018 12:38:37 +0100	[thread overview]
Message-ID: <fa3a0fcd74f271647322a5acaba0d4e2daa5d26f.1522235224.git.gustavo.pimentel@synopsys.com> (raw)
In-Reply-To: <cover.1522235224.git.gustavo.pimentel@synopsys.com>
In-Reply-To: <cover.1522235224.git.gustavo.pimentel@synopsys.com>

Replaces a simple division by 2 to a right shiftrotation of 1 bit.

Signed-off-by: Gustavo Pimentel <gustavo.pimentel@synopsys.com>
---
 drivers/pci/dwc/pcie-designware-host.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/pci/dwc/pcie-designware-host.c b/drivers/pci/dwc/pcie-designware-host.c
index 03e9b82..8e6fed4 100644
--- a/drivers/pci/dwc/pcie-designware-host.c
+++ b/drivers/pci/dwc/pcie-designware-host.c
@@ -332,8 +332,8 @@ int dw_pcie_host_init(struct pcie_port *pp)
 
 	cfg_res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "config");
 	if (cfg_res) {
-		pp->cfg0_size = resource_size(cfg_res) / 2;
-		pp->cfg1_size = resource_size(cfg_res) / 2;
+		pp->cfg0_size = resource_size(cfg_res) >> 1;
+		pp->cfg1_size = resource_size(cfg_res) >> 1;
 		pp->cfg0_base = cfg_res->start;
 		pp->cfg1_base = cfg_res->start + pp->cfg0_size;
 	} else if (!pp->va_cfg0_base) {
@@ -377,8 +377,8 @@ int dw_pcie_host_init(struct pcie_port *pp)
 			break;
 		case 0:
 			pp->cfg = win->res;
-			pp->cfg0_size = resource_size(pp->cfg) / 2;
-			pp->cfg1_size = resource_size(pp->cfg) / 2;
+			pp->cfg0_size = resource_size(pp->cfg) >> 1;
+			pp->cfg1_size = resource_size(pp->cfg) >> 1;
 			pp->cfg0_base = pp->cfg->start;
 			pp->cfg1_base = pp->cfg->start + pp->cfg0_size;
 			break;
-- 
2.7.4

  parent reply	other threads:[~2018-03-28 11:40 UTC|newest]

Thread overview: 37+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-03-28 11:38 [PATCH 0/8] Designware EP support and code clenan up Gustavo Pimentel
2018-03-28 11:38 ` [PATCH 1/8] bindings: PCI: designware: Example update Gustavo Pimentel
2018-04-02  5:23   ` Kishon Vijay Abraham I
2018-04-02  5:23     ` Kishon Vijay Abraham I
2018-04-03 10:33     ` Gustavo Pimentel
2018-04-03 10:52       ` Kishon Vijay Abraham I
2018-04-03 10:53         ` Kishon Vijay Abraham I
2018-04-03 13:13           ` Gustavo Pimentel
2018-04-06  6:23             ` Kishon Vijay Abraham I
2018-03-28 11:38 ` [PATCH 2/8] PCI: dwc: designware: Add support for endpoint mode Gustavo Pimentel
2018-04-02  5:34   ` Kishon Vijay Abraham I
2018-04-02  5:34     ` Kishon Vijay Abraham I
2018-04-04 10:20     ` Gustavo Pimentel
2018-04-06  7:16       ` Kishon Vijay Abraham I
2018-03-28 11:38 ` [PATCH 3/8] bindings: PCI: designware: Add support for the EP in designware driver Gustavo Pimentel
2018-04-02  5:35   ` Kishon Vijay Abraham I
2018-04-02  5:35     ` Kishon Vijay Abraham I
2018-04-03 10:43     ` Gustavo Pimentel
2018-04-03 10:55       ` Kishon Vijay Abraham I
2018-04-03 13:20         ` Gustavo Pimentel
2018-04-06  7:04           ` Kishon Vijay Abraham I
2018-04-04 11:50   ` Lorenzo Pieralisi
2018-04-04 11:56     ` Gustavo Pimentel
2018-04-09 19:12   ` Rob Herring
2018-04-10 11:11     ` Gustavo Pimentel
2018-03-28 11:38 ` [PATCH 4/8] misc: pci_endpoint_test: Add designware EP entry Gustavo Pimentel
2018-04-02  5:36   ` Kishon Vijay Abraham I
2018-04-02  5:36     ` Kishon Vijay Abraham I
2018-04-03 10:11     ` Gustavo Pimentel
2018-04-03 10:56       ` Kishon Vijay Abraham I
2018-03-28 11:38 ` [PATCH 5/8] PCI: dwc: designware: Define maximum number of vectors Gustavo Pimentel
2018-03-28 11:38 ` [PATCH 6/8] PCI: dwc: Replace lower into upper case characters Gustavo Pimentel
2018-03-28 12:05   ` Fabio Estevam
2018-03-28 13:00     ` Gustavo Pimentel
2018-03-29 13:56       ` Fabio Estevam
2018-03-28 11:38 ` Gustavo Pimentel [this message]
2018-03-28 11:38 ` [PATCH 8/8] PCI: dwc: Replace magic number by defines Gustavo Pimentel

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