PCI: dwc: Replace bit rotation operation (1 << bit) with BIT(bit)

Replace bit rotation operation (1 << bit) with BIT(bit), which
simplifies code reading.

No functional change is intended.

Signed-off-by: Gustavo Pimentel <gustavo.pimentel@synopsys.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: Joao Pinto <jpinto@synopsys.com>
Cc: Jingoo Han <jingoohan1@gmail.com>

diff --git a/drivers/pci/controller/dwc/pcie-designware-host.c b/drivers/pci/controller/dwc/pcie-designware-host.c
index c550c4a..45ff5e4 100644 (file)
--- a/drivers/pci/controller/dwc/pcie-designware-host.c
+++ b/drivers/pci/controller/dwc/pcie-designware-host.c
@@ -164,7 +164,7 @@ static void dw_pci_bottom_mask(struct irq_data *d)
                res = ctrl * MSI_REG_CTRL_BLOCK_SIZE;
                bit = d->hwirq % MAX_MSI_IRQS_PER_CTRL;
 
-               pp->irq_mask[ctrl] |= (1 << bit);
+               pp->irq_mask[ctrl] |= BIT(bit);
                dw_pcie_wr_own_conf(pp, PCIE_MSI_INTR0_MASK + res, 4,
                                    pp->irq_mask[ctrl]);
        }
@@ -187,7 +187,7 @@ static void dw_pci_bottom_unmask(struct irq_data *d)
                res = ctrl * MSI_REG_CTRL_BLOCK_SIZE;
                bit = d->hwirq % MAX_MSI_IRQS_PER_CTRL;
 
-               pp->irq_mask[ctrl] &= ~(1 << bit);
+               pp->irq_mask[ctrl] &= ~BIT(bit);
                dw_pcie_wr_own_conf(pp, PCIE_MSI_INTR0_MASK + res, 4,
                                    pp->irq_mask[ctrl]);
        }
@@ -207,7 +207,7 @@ static void dw_pci_bottom_ack(struct irq_data *d)
 
        raw_spin_lock_irqsave(&pp->lock, flags);
 
-       dw_pcie_wr_own_conf(pp, PCIE_MSI_INTR0_STATUS + res, 4, 1 << bit);
+       dw_pcie_wr_own_conf(pp, PCIE_MSI_INTR0_STATUS + res, 4, BIT(bit));
 
        if (pp->ops->msi_irq_ack)
                pp->ops->msi_irq_ack(d->hwirq, pp);