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crypto: omap-des - handle error of pm_runtime_get_sync

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pm_runtime_get_sync may not always succeed depending on SoC involved.
So handle the error appropriately ensuring usage_count is accurate in
case of failure.

Signed-off-by: Nishanth Menon <nm@ti.com>
Reviewed-by: Felipe Balbi <balbi@ti.com>
Reported-by: Joachim Eastwood <manabian@gmail.com>
Tested-by: Joachim Eastwood <manabian@gmail.com>
Acked-by: Joel Fernandes <joelf@ti.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Nishanth Menon 2014-04-15 11:58:31 -05:00 committed by Herbert Xu
parent 8ece117104
commit f51f593b3e
1 changed files with 23 additions and 3 deletions
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26
drivers/crypto/omap-des.c
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@ -223,12 +223,19 @@ static void omap_des_write_n(struct omap_des_dev *dd, u32 offset,
static int omap_des_hw_init(struct omap_des_dev *dd)
{
int err;
/*
* clocks are enabled when request starts and disabled when finished.
* It may be long delays between requests.
* Device might go to off mode to save power.
*/
pm_runtime_get_sync(dd->dev);
err = pm_runtime_get_sync(dd->dev);
if (err < 0) {
pm_runtime_put_noidle(dd->dev);
dev_err(dd->dev, "%s: failed to get_sync(%d)\n", __func__, err);
return err;
}
if (!(dd->flags & FLAGS_INIT)) {
dd->flags |= FLAGS_INIT;
@ -1082,7 +1089,12 @@ static int omap_des_probe(struct platform_device *pdev)
dd->phys_base = res->start;
pm_runtime_enable(dev);
pm_runtime_get_sync(dev);
err = pm_runtime_get_sync(dev);
if (err < 0) {
pm_runtime_put_noidle(dev);
dev_err(dd->dev, "%s: failed to get_sync(%d)\n", __func__, err);
goto err_get;
}
omap_des_dma_stop(dd);
@ -1147,6 +1159,7 @@ err_algs:
err_irq:
tasklet_kill(&dd->done_task);
tasklet_kill(&dd->queue_task);
err_get:
pm_runtime_disable(dev);
err_res:
dd = NULL;
@ -1190,7 +1203,14 @@ static int omap_des_suspend(struct device *dev)
static int omap_des_resume(struct device *dev)
{
pm_runtime_get_sync(dev);
int err;
err = pm_runtime_get_sync(dev);
if (err < 0) {
pm_runtime_put_noidle(dev);
dev_err(dev, "%s: failed to get_sync(%d)\n", __func__, err);
return err;
}
return 0;
}
#endif