mirrors/linux-stable
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2024-08-26 10:49:33 +00:00
Code Issues Releases Wiki Activity

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

Browse source 
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: Kim Phillips <kim.phillips@freescale.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Kim Phillips 2012-06-22 19:48:55 -05:00 committed by Herbert Xu
parent 4bba1e9f41
commit a8ea07c21d
1 changed files with 5 additions and 12 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

17
drivers/crypto/caam/jr.c
View file

@ -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;
head = ACCESS_ONCE(jrp->head);
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);
}