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| author | Tero Kristo <t-kristo@ti.com> | 2016-08-04 13:28:36 +0300 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2016-09-13 20:20:55 +0800 |
| commit | 4e7813a0b2aebb210416a418595ceb91ba4e5a37 (patch) | |
| tree | c004a1af006b07374385fd5d8399703f0cf91a44 /drivers/crypto | |
| parent | 71f89917ff96c03191b19c2bb8cd587b61004e62 (diff) | |
| download | blackbird-obmc-linux-4e7813a0b2aebb210416a418595ceb91ba4e5a37.tar.gz blackbird-obmc-linux-4e7813a0b2aebb210416a418595ceb91ba4e5a37.zip | |
crypto: omap-sham - avoid executing tasklet where not needed
Some of the call paths of OMAP SHA driver can avoid executing the next
step of the crypto queue under tasklet; instead, execute the next step
directly via function call. This avoids a costly round-trip via the
scheduler giving a slight performance boost.
Signed-off-by: Tero Kristo <t-kristo@ti.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers/crypto')
| -rw-r--r-- | drivers/crypto/omap-sham.c | 20 |
1 files changed, 15 insertions, 5 deletions
diff --git a/drivers/crypto/omap-sham.c b/drivers/crypto/omap-sham.c index 7fe4eef12fe2..fd50005fd942 100644 --- a/drivers/crypto/omap-sham.c +++ b/drivers/crypto/omap-sham.c @@ -1005,9 +1005,6 @@ static void omap_sham_finish_req(struct ahash_request *req, int err) if (req->base.complete) req->base.complete(&req->base, err); - - /* handle new request */ - tasklet_schedule(&dd->done_task); } static int omap_sham_handle_queue(struct omap_sham_dev *dd, @@ -1018,6 +1015,7 @@ static int omap_sham_handle_queue(struct omap_sham_dev *dd, unsigned long flags; int err = 0, ret = 0; +retry: spin_lock_irqsave(&dd->lock, flags); if (req) ret = ahash_enqueue_request(&dd->queue, req); @@ -1061,11 +1059,19 @@ static int omap_sham_handle_queue(struct omap_sham_dev *dd, err = omap_sham_final_req(dd); } err1: - if (err != -EINPROGRESS) + dev_dbg(dd->dev, "exit, err: %d\n", err); + + if (err != -EINPROGRESS) { /* done_task will not finish it, so do it here */ omap_sham_finish_req(req, err); + req = NULL; - dev_dbg(dd->dev, "exit, err: %d\n", err); + /* + * Execute next request immediately if there is anything + * in queue. + */ + goto retry; + } return ret; } @@ -1653,6 +1659,10 @@ finish: dev_dbg(dd->dev, "update done: err: %d\n", err); /* finish curent request */ omap_sham_finish_req(dd->req, err); + + /* If we are not busy, process next req */ + if (!test_bit(FLAGS_BUSY, &dd->flags)) + omap_sham_handle_queue(dd, NULL); } static irqreturn_t omap_sham_irq_common(struct omap_sham_dev *dd) |
