[PATCH 3.14 060/228] irqchip: armada-370-xp: implement the ->check_device() msi_chip operation

Greg Kroah-Hartman
2014-06-04T23:21:36Z

From: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

commit 830cbe4b7a918613276aa3d3b28d24410623f92c upstream.

Until now, we were leaving the ->check_device() msi_chip operation
empty, which leads the PCI core to believe that we support both MSI
and MSI-X. In fact, we do not support MSI-X, so we have to tell this
to the PCI core by providing an implementation of this operation.

Fixes: 31f614edb726fcc4d5aa0f2895fbdec9b04a3ca4 ('irqchip: armada-370-xp: implement MSI support')
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Link: https://lkml.kernel.org/r/1397823593-1932-3-git-send-email-thomas.petazzoni@free-electrons.com
Tested-by: Neil Greatorex <neil@fatboyfat.co.uk>
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
drivers/irqchip/irq-armada-370-xp.c | 10 ++++++++++
1 file changed, 10 insertions(+)

--- a/drivers/irqchip/irq-armada-370-xp.c
+++ b/drivers/irqchip/irq-armada-370-xp.c
@@ -160,6 +160,15 @@ static void armada_370_xp_teardown_msi_i
armada_370_xp_free_msi(d->hwirq);
}

+static int armada_370_xp_check_msi_device(struct msi_chip *chip, struct pci_dev *dev,
+ int nvec, int type)
+{
+ /* We support MSI, but not MSI-X */
+ if (type == PCI_CAP_ID_MSI)
+ return 0;
+ return -EINVAL;
+}
+
static struct irq_chip armada_370_xp_msi_irq_chip = {
.name = "armada_370_xp_msi_irq",
.irq_enable = unmask_msi_irq,
@@ -198,6 +207,7 @@ static int armada_370_xp_msi_init(struct

msi_chip->setup_irq = armada_370_xp_setup_msi_irq;
msi_chip->teardown_irq = armada_370_xp_teardown_msi_irq;
+ msi_chip->check_device = armada_370_xp_check_msi_device;
msi_chip->of_node = node;

armada_370_xp_msi_domain =