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Steve Cornelius authored
The job ring driver exhibited a hang condition in the top of caam_jr_dequeue() where a BUG_ON statement looks for a condition where the output ring is said to have valid entries by the ring logic, but the ring entries apparently have NULL descriptor pointers. In the initial ARM port of this driver, the cache flush call of the output ring content occured before the output ring read index register read occurred, exposing a condition where the driver sensed valid output entries, yet the entries written by the ring hardware were not invalidated, and therefore were not visible to the processor, appearing as false NULL entries. This patch relocates the invalidate call to immediately follow the check of the output read index, where it is required. Signed-off-by: Vicki Milhoan <vicki.milhoan@freescale.com> Signed-off-by: Steve Cornelius <steve.cornelius@freescale.com> Signed-off-by: Terry Lv <r65388@freescale.com>
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