dmaengine: ioat: disable relaxed ordering before registering the device

ioat3_dma_probe() disabled PCIe relaxed ordering after calling
dma_async_device_register(), so if an error occurs and the code jumps
to err_disable_interrupts, the function returns with the device still
registered in the core's dma_device_list while the caller frees the
ioatdma_device struct, leaving a dangling registration that anything
walking the device list can dereference after it's been freed.

Move the capability read/write ahead of dma_async_device_register()
instead. Nothing after registration depends on relaxed ordering
already being disabled, and nothing before it depends on the device
being registered, so this is a plain reordering. It also means every
remaining step after registration can't fail, so there's no need to
ever have to unregister the device once registered.

Fixes: 511deae0261c ("dmaengine: ioatdma: disable relaxed ordering for ioatdma")
Reported-by: Sashiko <sashiko-bot@kernel.org>
Link: https://lore.kernel.org/dmaengine/20260707165906.249F41F000E9@smtp.kernel.org
Acked-by: Dave Jiang <dave.jiang@intel.com>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Signed-off-by: Logan Gunthorpe <logang@deltatee.com>
Link: https://lore.kernel.org/dmaengine/20260707165906.249F41F000E9@smtp.kernel.org/T/#u
Link: https://patch.msgid.link/20260902062153.31048-9-logang@deltatee.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>

0 files changed, 0 insertions, 0 deletions