diff options
| author | Faiz Abbas <faiz_abbas@ti.com> | 2017-08-10 16:54:55 +0530 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2017-08-22 15:49:33 -0500 |
| commit | 8c934095fa2f336d92b722f49f78ca7abf47e051 (patch) | |
| tree | fd6058c40c2a7e60a36206d23b75bd055ea6845a /drivers/pci/dwc | |
| parent | 71cee8e1902a3c1d00e52dc022e1aff3ac2680d3 (diff) | |
| download | linux-8c934095fa2f336d92b722f49f78ca7abf47e051.tar.bz2 | |
PCI: dwc: Clear MSI interrupt status after it is handled, not before
If the interrupt status is cleared before it is handled, it is possible
that another interrupt will trigger while servicing the previous one. This
is causing timeouts in some wireless lan cards which use PCIe.
Clear MSI interrupt status after it gets serviced instead of before calling
generic_handler.
Signed-off-by: Faiz Abbas <faiz_abbas@ti.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-By: Joao Pinto <jpinto@synopsys.com>
Diffstat (limited to 'drivers/pci/dwc')
| -rw-r--r-- | drivers/pci/dwc/pcie-designware-host.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/pci/dwc/pcie-designware-host.c b/drivers/pci/dwc/pcie-designware-host.c index 157621175147..99cb70b5de79 100644 --- a/drivers/pci/dwc/pcie-designware-host.c +++ b/drivers/pci/dwc/pcie-designware-host.c @@ -71,9 +71,9 @@ irqreturn_t dw_handle_msi_irq(struct pcie_port *pp) while ((pos = find_next_bit((unsigned long *) &val, 32, pos)) != 32) { irq = irq_find_mapping(pp->irq_domain, i * 32 + pos); + generic_handle_irq(irq); dw_pcie_wr_own_conf(pp, PCIE_MSI_INTR0_STATUS + i * 12, 4, 1 << pos); - generic_handle_irq(irq); pos++; } } |