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authorDave Airlie <airlied@redhat.com>2018-01-26 15:27:07 +1000
committerDave Airlie <airlied@redhat.com>2018-01-26 15:27:07 +1000
commitbaa35cc322c1f6c43506ee9a32c232b05a7eaa8c (patch)
treeae0a09f278f3b26af53b024e3e723cf6ccbdf2d3 /drivers
parent7e3f8e91e8d92a542ba30d7b07108882e82ad348 (diff)
parent0fd189a95fdbc631737df5f27a0fc0a3dd31b75e (diff)
Merge branch 'linux-4.15' of git://github.com/skeggsb/linux into drm-fixes
Single irq regression fix * 'linux-4.15' of git://github.com/skeggsb/linux: drm/nouveau: Move irq setup/teardown to pci ctor/dtor
Diffstat (limited to 'drivers')
-rw-r--r--drivers/gpu/drm/nouveau/nvkm/subdev/pci/base.c46
1 files changed, 31 insertions, 15 deletions
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/pci/base.c b/drivers/gpu/drm/nouveau/nvkm/subdev/pci/base.c
index deb96de54b00..ee2431a7804e 100644
--- a/drivers/gpu/drm/nouveau/nvkm/subdev/pci/base.c
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/pci/base.c
@@ -71,6 +71,10 @@ nvkm_pci_intr(int irq, void *arg)
struct nvkm_pci *pci = arg;
struct nvkm_device *device = pci->subdev.device;
bool handled = false;
+
+ if (pci->irq < 0)
+ return IRQ_HANDLED;
+
nvkm_mc_intr_unarm(device);
if (pci->msi)
pci->func->msi_rearm(pci);
@@ -84,11 +88,6 @@ nvkm_pci_fini(struct nvkm_subdev *subdev, bool suspend)
{
struct nvkm_pci *pci = nvkm_pci(subdev);
- if (pci->irq >= 0) {
- free_irq(pci->irq, pci);
- pci->irq = -1;
- }
-
if (pci->agp.bridge)
nvkm_agp_fini(pci);
@@ -108,8 +107,20 @@ static int
nvkm_pci_oneinit(struct nvkm_subdev *subdev)
{
struct nvkm_pci *pci = nvkm_pci(subdev);
- if (pci_is_pcie(pci->pdev))
- return nvkm_pcie_oneinit(pci);
+ struct pci_dev *pdev = pci->pdev;
+ int ret;
+
+ if (pci_is_pcie(pci->pdev)) {
+ ret = nvkm_pcie_oneinit(pci);
+ if (ret)
+ return ret;
+ }
+
+ ret = request_irq(pdev->irq, nvkm_pci_intr, IRQF_SHARED, "nvkm", pci);
+ if (ret)
+ return ret;
+
+ pci->irq = pdev->irq;
return 0;
}
@@ -117,7 +128,6 @@ static int
nvkm_pci_init(struct nvkm_subdev *subdev)
{
struct nvkm_pci *pci = nvkm_pci(subdev);
- struct pci_dev *pdev = pci->pdev;
int ret;
if (pci->agp.bridge) {
@@ -131,28 +141,34 @@ nvkm_pci_init(struct nvkm_subdev *subdev)
if (pci->func->init)
pci->func->init(pci);
- ret = request_irq(pdev->irq, nvkm_pci_intr, IRQF_SHARED, "nvkm", pci);
- if (ret)
- return ret;
-
- pci->irq = pdev->irq;
-
/* Ensure MSI interrupts are armed, for the case where there are
* already interrupts pending (for whatever reason) at load time.
*/
if (pci->msi)
pci->func->msi_rearm(pci);
- return ret;
+ return 0;
}
static void *
nvkm_pci_dtor(struct nvkm_subdev *subdev)
{
struct nvkm_pci *pci = nvkm_pci(subdev);
+
nvkm_agp_dtor(pci);
+
+ if (pci->irq >= 0) {
+ /* freq_irq() will call the handler, we use pci->irq == -1
+ * to signal that it's been torn down and should be a noop.
+ */
+ int irq = pci->irq;
+ pci->irq = -1;
+ free_irq(irq, pci);
+ }
+
if (pci->msi)
pci_disable_msi(pci->pdev);
+
return nvkm_pci(subdev);
}