[Intel-gfx] [PATCH v3 07/14] drm/i915: Use a DRM-managed action to release the PCI bridge device

Matt Roper
2022-09-06T23:50:56Z

As we start supporting multiple uncore structures in future patches, the
MMIO cleanup (which make also get called mid-init if there's a failure)
will become more complicated. Moving to DRM-managed actions will help
keep things simple.

Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
---
drivers/gpu/drm/i915/i915_driver.c | 12 +++++++++---
1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_driver.c b/drivers/gpu/drm/i915/i915_driver.c
index 18acba1bc3b0..1f46dd1ffaf7 100644
--- a/drivers/gpu/drm/i915/i915_driver.c
+++ b/drivers/gpu/drm/i915/i915_driver.c
@@ -105,6 +105,12 @@ static const char irst_name[] = "INT3392";

static const struct drm_driver i915_drm_driver;

+static void i915_release_bridge_dev(struct drm_device *dev,
+ void *bridge)
+{
+ pci_dev_put(bridge);
+}
+
static int i915_get_bridge_dev(struct drm_i915_private *dev_priv)
{
int domain = pci_domain_nr(to_pci_dev(dev_priv->drm.dev)->bus);
@@ -115,7 +121,9 @@ static int i915_get_bridge_dev(struct drm_i915_private *dev_priv)
drm_err(&dev_priv->drm, "bridge device not found\n");
return -EIO;
}
- return 0;
+
+ return drmm_add_action_or_reset(&dev_priv->drm, i915_release_bridge_dev,
+ dev_priv->bridge_dev);
}

/* Allocate space for the MCH regs if needed, return nonzero on error */
@@ -452,7 +460,6 @@ static int i915_driver_mmio_probe(struct drm_i915_private *dev_priv)
err_uncore:
intel_teardown_mchbar(dev_priv);
intel_uncore_fini_mmio(&dev_priv->uncore);
- pci_dev_put(dev_priv->bridge_dev);

return ret;
}
@@ -465,7 +472,6 @@ static void i915_driver_mmio_release(struct drm_i915_private *dev_priv)
{
intel_teardown_mchbar(dev_priv);
intel_uncore_fini_mmio(&dev_priv->uncore);
- pci_dev_put(dev_priv->bridge_dev);
}

/**
--
2.37.2