Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
Merge tag 'driver-core-6.15-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/driver-core/driver-core
Pull driver core fix from Greg KH:
"Here is a single driver core fix for a regression for platform devices
that is a regression from a change that went into 6.15-rc1 that
affected Pixel devices. It has been in linux-next for over a week with
no reported problems"
* tag 'driver-core-6.15-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/driver-core/driver-core:
platform: Fix race condition during DMA configure at IOMMU probe time
+3
-3
+3
-3
drivers/base/platform.c
+3
-3
drivers/base/platform.c
···
1440
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static int platform_dma_configure(struct device *dev)
1442
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{
1443
-
struct platform_driver *drv = to_platform_driver(dev->driver);
1443
+
struct device_driver *drv = READ_ONCE(dev->driver);
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struct fwnode_handle *fwnode = dev_fwnode(dev);
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enum dev_dma_attr attr;
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int ret = 0;
···
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attr = acpi_get_dma_attr(to_acpi_device_node(fwnode));
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ret = acpi_dma_configure(dev, attr);
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}
1454
-
/* @drv may not be valid when we're called from the IOMMU layer */
1455
-
if (ret || !dev->driver || drv->driver_managed_dma)
1454
+
/* @dev->driver may not be valid when we're called from the IOMMU layer */
1455
+
if (ret || !drv || to_platform_driver(drv)->driver_managed_dma)
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return ret;
1457
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ret = iommu_device_use_default_domain(dev);