dmaengine: idxd: fix idxd conf_dev 'struct device' lifetime

mainline inclusion
from mainline-v5.13
commit 47c16ac2
category: bugfix
bugzilla: https://gitee.com/openeuler/intel-kernel/issues/I596WO


CVE: NA

Intel-SIG: commit 47c16ac2 dmaengine: idxd: fix idxd conf_dev 'struct device' lifetime.
Incremental backporting patches for DSA/IAA on Intel Xeon platform.

--------------------------------

The devm managed lifetime is incompatible with 'struct device' objects that
resides in idxd context. This is one of the series that clean up the idxd
driver 'struct device' lifetime. Fix idxd->conf_dev 'struct device'
lifetime. Address issues flagged by CONFIG_DEBUG_KOBJECT_RELEASE.
Add release functions in order to free the allocated memory at the
appropriate time.

Reported-by: Jason Gunthorpe <jgg@nvidia.com>
Fixes: bfe1d560 ("dmaengine: idxd: Init and probe for Intel data accelerators")
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/161852985319.2203940.4650791514462735368.stgit@djiang5-desk3.ch.intel.com


Signed-off-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Xiaochen Shen <xiaochen.shen@intel.com>