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PCI: dra7xx: Iterate over INTx status bits 

It is possible that more than one legacy IRQ may be set at the same
time, therefore iterate and handle all the pending INTx interrupts
before clearing the status and exiting the IRQ handler. Otherwise, some
interrupts would be lost.

Signed-off-by: Vignesh R <vigneshr@ti.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Acked-by: Kishon Vijay Abraham I <kishon@ti.com>
This commit is contained in:
Vignesh R 2017-12-29 17:11:31 +05:30 committed by Lorenzo Pieralisi
parent 524d59f6e3
commit 09b2d20349
1 changed files with 7 additions and 3 deletions
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10
drivers/pci/dwc/pci-dra7xx.c
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@ -257,7 +257,8 @@ static irqreturn_t dra7xx_pcie_msi_irq_handler(int irq, void *arg)
struct dra7xx_pcie *dra7xx = arg;
struct dw_pcie *pci = dra7xx->pci;
struct pcie_port *pp = &pci->pp;
u32 reg;
unsigned long reg;
u32 virq, bit;
reg = dra7xx_pcie_readl(dra7xx, PCIECTRL_DRA7XX_CONF_IRQSTATUS_MSI);
@ -269,8 +270,11 @@ static irqreturn_t dra7xx_pcie_msi_irq_handler(int irq, void *arg)
case INTB:
case INTC:
case INTD:
generic_handle_irq(irq_find_mapping(dra7xx->irq_domain,
ffs(reg) - 1));
for_each_set_bit(bit, &reg, PCI_NUM_INTX) {
virq = irq_find_mapping(dra7xx->irq_domain, bit);
if (virq)
generic_handle_irq(virq);
}
break;
}