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Commit a8ea07c2 authored by Kim Phillips's avatar Kim Phillips Committed by Herbert Xu
Browse files

crypto: caam - only query h/w in job ring dequeue path 



Code was needlessly checking the s/w job ring when there
would be nothing to process if the h/w's output completion
ring were empty anyway.

Signed-off-by: default avatarKim Phillips <kim.phillips@freescale.com>
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent 4bba1e9f

drivers/crypto/caam/jr.c

+5 −12
Original line number Diff line number Diff line
@@ -59,15 +59,15 @@ static void caam_jr_dequeue(unsigned long devarg) 
	u32 *userdesc, userstatus;

	void *userarg;



	spin_lock_bh(&jrp->outlock);

	while (rd_reg32(&jrp->rregs->outring_used)) {



		head = ACCESS_ONCE(jrp->head);

	sw_idx = tail = jrp->tail;



	while (CIRC_CNT(head, tail, JOBR_DEPTH) >= 1 &&

	       rd_reg32(&jrp->rregs->outring_used)) {

		spin_lock_bh(&jrp->outlock);



		sw_idx = tail = jrp->tail;

		hw_idx = jrp->out_ring_read_index;



		for (i = 0; CIRC_CNT(head, tail + i, JOBR_DEPTH) >= 1; i++) {

			sw_idx = (tail + i) & (JOBR_DEPTH - 1);
@@ -121,15 +121,8 @@ static void caam_jr_dequeue(unsigned long devarg) 


		/* Finally, execute user's callback */

		usercall(dev, userdesc, userstatus, userarg);



		spin_lock_bh(&jrp->outlock);



		head = ACCESS_ONCE(jrp->head);

		sw_idx = tail = jrp->tail;

	}



	spin_unlock_bh(&jrp->outlock);



	/* reenable / unmask IRQs */

	clrbits32(&jrp->rregs->rconfig_lo, JRCFG_IMSK);

}