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[ Upstream commit 7af1e0aceeb321cbc90fcf6fa0bec8870290377f ] With the possibility of multiple wq drivers that can be bound to the wq, the user config tool accel-config needs a way to know which wq driver to bind to the wq. Introduce per wq driver_name sysfs attribute where the user can indicate the driver to be bound to the wq. This allows accel-config to just bind to the driver using wq->driver_name. Signed-off-by: Dave Jiang <dave.jiang@intel.com> Signed-off-by: Tom Zanussi <tom.zanussi@linux.intel.com> Reviewed-by: Fenghua Yu <fenghua.yu@intel.com> Acked-by: Vinod Koul <vkoul@kernel.org> Link: https://lore.kernel.org/r/20230908201045.4115614-1-fenghua.yu@intel.com Signed-off-by: Vinod Koul <vkoul@kernel.org> Stable-dep-of: 8dfa57aabff6 ("dmaengine: idxd: Fix allowing write() from different address spaces") Signed-off-by: Sasha Levin <sashal@kernel.org>