[PATCH 4/5] drm/msm/a6xx: Remove devm calls from gmu driver

[Sean Paul <sean@poorly.run>]

From: Sean Paul <seanpaul@chromium.org>

The gmu driver is initalized and cleaned up with calls from the gpu driver. As
such, the platform device stays valid after a6xx_gmu_remove is called and the
device managed resources are not freed. In the case of gpu probe failures or
unbind, these resources will remain managed.

If the gpu bind is run again (eg: if there's a probe defer somewhere in msm),
these resources will be initialized again for the same device, creating multiple
references. In the case of irqs, this causes failures since the irqs are
not shared (nor should they be).

This patch removes all devm_* calls and manually cleans things up in
gmu_remove.

Signed-off-by: Sean Paul <seanpaul@chromium.org>
---
 drivers/gpu/drm/msm/adreno/a6xx_gmu.c | 18 ++++++++++++------
 1 file changed, 12 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gmu.c b/drivers/gpu/drm/msm/adreno/a6xx_gmu.c
index 7465423e9b71..701b813fa38a 100644
--- a/drivers/gpu/drm/msm/adreno/a6xx_gmu.c
+++ b/drivers/gpu/drm/msm/adreno/a6xx_gmu.c
@@ -505,9 +505,9 @@ static void a6xx_gmu_rpmh_init(struct a6xx_gmu *gmu)
 
 err:
 	if (!IS_ERR_OR_NULL(pdcptr))
-		devm_iounmap(gmu->dev, pdcptr);
+		iounmap(pdcptr);
 	if (!IS_ERR_OR_NULL(seqptr))
-		devm_iounmap(gmu->dev, seqptr);
+		iounmap(seqptr);
 }
 
 /*
@@ -1197,7 +1197,7 @@ static void __iomem *a6xx_gmu_get_mmio(struct platform_device *pdev,
 		return ERR_PTR(-EINVAL);
 	}
 
-	ret = devm_ioremap(&pdev->dev, res->start, resource_size(res));
+	ret = ioremap(res->start, resource_size(res));
 	if (!ret) {
 		DRM_DEV_ERROR(&pdev->dev, "Unable to map the %s registers\n", name);
 		return ERR_PTR(-EINVAL);
@@ -1213,10 +1213,10 @@ static int a6xx_gmu_get_irq(struct a6xx_gmu *gmu, struct platform_device *pdev,
 
 	irq = platform_get_irq_byname(pdev, name);
 
-	ret = devm_request_irq(&pdev->dev, irq, handler, IRQF_TRIGGER_HIGH,
-		name, gmu);
+	ret = request_irq(irq, handler, IRQF_TRIGGER_HIGH, name, gmu);
 	if (ret) {
-		DRM_DEV_ERROR(&pdev->dev, "Unable to get interrupt %s\n", name);
+		DRM_DEV_ERROR(&pdev->dev, "Unable to get interrupt %s %d\n",
+			      name, ret);
 		return ret;
 	}
 
@@ -1241,12 +1241,18 @@ void a6xx_gmu_remove(struct a6xx_gpu *a6xx_gpu)
 		dev_pm_domain_detach(gmu->gxpd, false);
 	}
 
+	iounmap(gmu->mmio);
+	gmu->mmio = NULL;
+
 	a6xx_gmu_memory_free(gmu, gmu->hfi);
 
 	iommu_detach_device(gmu->domain, gmu->dev);
 
 	iommu_domain_free(gmu->domain);
 
+	free_irq(gmu->gmu_irq, gmu);
+	free_irq(gmu->hfi_irq, gmu);
+
 	gmu->initialized = false;
 }
 
-- 
Sean Paul, Software Engineer, Google / Chromium OS

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