From: Eric Auger <eric.auger@linaro.org>
To: eric.auger@st.com, eric.auger@linaro.org,
alex.williamson@redhat.com, b.reynal@virtualopensystems.com,
linux-arm-kernel@lists.infradead.org,
kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org
Cc: suravee.suthikulpanit@amd.com, thomas.lendacky@amd.com,
christoffer.dall@linaro.org, linux-kernel@vger.kernel.org,
patches@linaro.org
Subject: [PATCH] VFIO: platform: clear IRQ_NOAUTOEN when de-assigning the IRQ
Date: Wed, 14 Oct 2015 15:32:56 +0000 [thread overview]
Message-ID: <1444836776-2364-1-git-send-email-eric.auger@linaro.org> (raw)
The vfio platform driver currently sets the IRQ_NOAUTOEN before
doing the request_irq to properly handle the user masking. However
it does not clear it when de-assigning the IRQ. This brings issues
when loading the native driver again which may not explicitly enable
the IRQ. This problem was observed with xgbe driver.
Signed-off-by: Eric Auger <eric.auger@linaro.org>
---
drivers/vfio/platform/vfio_platform_irq.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/vfio/platform/vfio_platform_irq.c b/drivers/vfio/platform/vfio_platform_irq.c
index 88bba57..46d4750 100644
--- a/drivers/vfio/platform/vfio_platform_irq.c
+++ b/drivers/vfio/platform/vfio_platform_irq.c
@@ -185,6 +185,7 @@ static int vfio_set_trigger(struct vfio_platform_device *vdev, int index,
int ret;
if (irq->trigger) {
+ irq_clear_status_flags(irq->hwirq, IRQ_NOAUTOEN);
free_irq(irq->hwirq, irq);
kfree(irq->name);
eventfd_ctx_put(irq->trigger);
--
1.9.1
reply other threads:[~2015-10-14 15:33 UTC|newest]
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