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authorDmitry Kasatkin <dmitry.kasatkin@nokia.com>2011-06-02 21:10:09 +0300
committerHerbert Xu <herbert@gondor.apana.org.au>2011-06-30 07:44:04 +0800
commit6cb3ffe100ef4c6d5be0bfe4f8ac6d4227bb91bd (patch)
tree69f69d5921be65aa20c508ac74608c2eda40b578 /drivers/crypto
parent171cb9a2807588630fed401f3e0b8ae22d91595f (diff)
downloadblackbird-op-linux-6cb3ffe100ef4c6d5be0bfe4f8ac6d4227bb91bd.tar.gz
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crypto: omap-sham - remove dedicated queue handling tasklet
Calling omap_sham_handle_queue from "done" tasklet should be done after irq scheduled tasklet completes. Having additional tasklet does not solve that issue because it might be execute before. So queue handling tasklet has been removed and functionality integrated into single tasklet. Signed-off-by: Dmitry Kasatkin <dmitry.kasatkin@nokia.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers/crypto')
-rw-r--r--drivers/crypto/omap-sham.c24
1 files changed, 9 insertions, 15 deletions
diff --git a/drivers/crypto/omap-sham.c b/drivers/crypto/omap-sham.c
index 84e5890c57e9..24de4ace9783 100644
--- a/drivers/crypto/omap-sham.c
+++ b/drivers/crypto/omap-sham.c
@@ -146,7 +146,6 @@ struct omap_sham_dev {
int dma;
int dma_lch;
struct tasklet_struct done_task;
- struct tasklet_struct queue_task;
unsigned long flags;
struct crypto_queue queue;
@@ -653,6 +652,9 @@ 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,
@@ -716,11 +718,9 @@ static int omap_sham_handle_queue(struct omap_sham_dev *dd,
err = omap_sham_final_req(dd);
}
err1:
- if (err != -EINPROGRESS) {
+ if (err != -EINPROGRESS)
/* done_task will not finish it, so do it here */
omap_sham_finish_req(req, err);
- tasklet_schedule(&dd->queue_task);
- }
dev_dbg(dd->dev, "exit, err: %d\n", err);
@@ -1035,6 +1035,11 @@ static void omap_sham_done_task(unsigned long data)
struct omap_sham_dev *dd = (struct omap_sham_dev *)data;
int ready = 0, err = 0;
+ if (!test_bit(FLAGS_BUSY, &dd->flags)) {
+ omap_sham_handle_queue(dd, NULL);
+ return;
+ }
+
if (test_and_clear_bit(FLAGS_OUTPUT_READY, &dd->flags))
ready = 1;
@@ -1050,18 +1055,9 @@ static void omap_sham_done_task(unsigned long data)
dev_dbg(dd->dev, "update done: err: %d\n", err);
/* finish curent request */
omap_sham_finish_req(dd->req, err);
- /* start new request */
- omap_sham_handle_queue(dd, NULL);
}
}
-static void omap_sham_queue_task(unsigned long data)
-{
- struct omap_sham_dev *dd = (struct omap_sham_dev *)data;
-
- omap_sham_handle_queue(dd, NULL);
-}
-
static irqreturn_t omap_sham_irq(int irq, void *dev_id)
{
struct omap_sham_dev *dd = dev_id;
@@ -1137,7 +1133,6 @@ static int __devinit omap_sham_probe(struct platform_device *pdev)
INIT_LIST_HEAD(&dd->list);
spin_lock_init(&dd->lock);
tasklet_init(&dd->done_task, omap_sham_done_task, (unsigned long)dd);
- tasklet_init(&dd->queue_task, omap_sham_queue_task, (unsigned long)dd);
crypto_init_queue(&dd->queue, OMAP_SHAM_QUEUE_LENGTH);
dd->irq = -1;
@@ -1246,7 +1241,6 @@ static int __devexit omap_sham_remove(struct platform_device *pdev)
for (i = 0; i < ARRAY_SIZE(algs); i++)
crypto_unregister_ahash(&algs[i]);
tasklet_kill(&dd->done_task);
- tasklet_kill(&dd->queue_task);
iounmap(dd->io_base);
clk_put(dd->iclk);
omap_sham_dma_cleanup(dd);
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