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authorMarc Zyngier <marc.zyngier@arm.com>2018-05-08 13:14:31 +0100
committerThomas Gleixner <tglx@linutronix.de>2018-05-13 15:58:59 +0200
commit6988e0e0d28328467e218f59589b2770675a9ebd (patch)
tree823e5cb928612d0bf2186f1600c0191124156eb8 /drivers/bus
parent0be8153cbc2af9a96e9ab8631fc3ba23bb52dbe3 (diff)
downloadlinux-6988e0e0d28328467e218f59589b2770675a9ebd.tar.bz2
genirq/msi: Limit level-triggered MSI to platform devices
Nobody would be insane enough to try and use level triggered MSIs on PCI, but let's make sure it doesn't happen. Also, let's mandate that the irqchip backing the platform MSI domain is providing the IRQCHIP_SUPPORTS_LEVEL_MSI flag. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Rob Herring <robh@kernel.org> Cc: Jason Cooper <jason@lakedaemon.net> Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org> Cc: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Cc: Thomas Petazzoni <thomas.petazzoni@bootlin.com> Cc: Miquel Raynal <miquel.raynal@bootlin.com> Link: https://lkml.kernel.org/r/20180508121438.11301-3-marc.zyngier@arm.com
Diffstat (limited to 'drivers/bus')
-rw-r--r--drivers/bus/fsl-mc/fsl-mc-msi.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/bus/fsl-mc/fsl-mc-msi.c b/drivers/bus/fsl-mc/fsl-mc-msi.c
index ec35e255b496..8b9c66d7c4ff 100644
--- a/drivers/bus/fsl-mc/fsl-mc-msi.c
+++ b/drivers/bus/fsl-mc/fsl-mc-msi.c
@@ -163,6 +163,8 @@ struct irq_domain *fsl_mc_msi_create_irq_domain(struct fwnode_handle *fwnode,
{
struct irq_domain *domain;
+ if (WARN_ON((info->flags & MSI_FLAG_LEVEL_CAPABLE)))
+ info->flags &= ~MSI_FLAG_LEVEL_CAPABLE;
if (info->flags & MSI_FLAG_USE_DEF_DOM_OPS)
fsl_mc_msi_update_dom_ops(info);
if (info->flags & MSI_FLAG_USE_DEF_CHIP_OPS)