diff options
| author | Linus Torvalds <torvalds@linux-foundation.org> | 2025-05-10 09:53:11 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2025-05-10 09:53:11 -0700 |
| commit | 345030986df8f7712f9e4c00fe61e145c8984ef3 (patch) | |
| tree | 62719ce1861b3b024c46267cb53db1ef1c5b3308 | |
| parent | bec6f00f120ea68ba584def5b7416287e7dd29a7 (diff) | |
| parent | 95deee37a12364f410d22c6a8383f59738a2fef3 (diff) | |
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
| -rw-r--r-- | drivers/base/platform.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/base/platform.c b/drivers/base/platform.c index 1813cfd0c4bd..cfccf3ff36e7 100644 --- a/drivers/base/platform.c +++ b/drivers/base/platform.c @@ -1440,7 +1440,7 @@ static void platform_shutdown(struct device *_dev) static int platform_dma_configure(struct device *dev) { - struct platform_driver *drv = to_platform_driver(dev->driver); + struct device_driver *drv = READ_ONCE(dev->driver); struct fwnode_handle *fwnode = dev_fwnode(dev); enum dev_dma_attr attr; int ret = 0; @@ -1451,8 +1451,8 @@ static int platform_dma_configure(struct device *dev) attr = acpi_get_dma_attr(to_acpi_device_node(fwnode)); ret = acpi_dma_configure(dev, attr); } - /* @drv may not be valid when we're called from the IOMMU layer */ - if (ret || !dev->driver || drv->driver_managed_dma) + /* @dev->driver may not be valid when we're called from the IOMMU layer */ + if (ret || !drv || to_platform_driver(drv)->driver_managed_dma) return ret; ret = iommu_device_use_default_domain(dev); |