[PATCH v7 0/8] idxd 'struct device' lifetime handling fixes

Dave Jiang
2021-03-22T23:32:09Z

v7:
- Fix up the 'struct device' setup in char device code (Jason)
- Split out the char dev fixes (Jason)
- Split out the DMA dev fixes (Dan)
- Split out the each of the conf_dev fixes
- Split out removal of the pcim_* calls
- Split out removal of the devm_* calls
- Split out the fixes for interrupt config calls
- Reviewed by Dan.

v6:
- Fix char dev initialization issues (Jason)
- Fix other 'struct device' initialization issues.

v5:
- Rebased against 5.12-rc dmaengine/fixes
v4:
- fix up the life time of cdev creation/destruction (Jason)
- Tested with KASAN and other memory allocation leak detections. (Jason)

v3:
- Remove devm_* for irq request and cleanup related bits (Jason)
v2:
- Remove all devm_* alloc for idxd_device (Jason)
- Add kref dep for dma_dev (Jason)

Vinod,
The series fixes the various 'struct device' lifetime handling in the
idxd driver. The devm managed lifetime is incompatible with 'struct device'
objects that resides in the idxd context. Tested with
CONFIG_DEBUG_KOBJECT_RELEASE and address all issues from that.

Please consider for damengine/fixes for the 5.12-rc.

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Dave Jiang (8):
dmaengine: idxd: fix dma device lifetime
dmaengine: idxd: cleanup pci interrupt vector allocation management
dmaengine: idxd: removal of pcim managed mmio mapping
dmaengine: idxd: fix idxd conf_dev 'struct device' lifetime
dmaengine: idxd: fix wq conf_dev 'struct device' lifetime
dmaengine: idxd: fix engine conf_dev lifetime
dmaengine: idxd: fix group conf_dev lifetime
dmaengine: idxd: fix cdev setup and free device lifetime issues

drivers/dma/idxd/cdev.c | 131 +++++++-----------
drivers/dma/idxd/device.c | 20 +--
drivers/dma/idxd/idxd.h | 54 ++++++--
drivers/dma/idxd/init.c | 284 +++++++++++++++++++++++++++-----------
drivers/dma/idxd/irq.c | 10 +-
drivers/dma/idxd/sysfs.c | 239 ++++++++++++++++----------------
6 files changed, 437 insertions(+), 301 deletions(-)

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