| Message ID | 1528822711-13342-1-git-send-email-loic.poulain@linaro.org |
|---|---|
| State | New |
| Headers | show |
| Series | remoteproc: wcnss: Wait for iris before starting | expand |
Quoting Loic Poulain (2018-06-12 09:58:31) > wcnss_start fails when called by remoteproc before iris probing. Please add () to functions so we know they're functions and not variables or something else. > Fix this by adding synchronization/completion on iris assignment. > > Signed-off-by: Loic Poulain <loic.poulain@linaro.org> > --- > drivers/remoteproc/qcom_wcnss.c | 10 ++++++++++ > 1 file changed, 10 insertions(+) > > diff --git a/drivers/remoteproc/qcom_wcnss.c b/drivers/remoteproc/qcom_wcnss.c > index b0e07e9..e5fbf91 100644 > --- a/drivers/remoteproc/qcom_wcnss.c > +++ b/drivers/remoteproc/qcom_wcnss.c > @@ -86,6 +86,7 @@ struct qcom_wcnss { > > struct mutex iris_lock; > struct qcom_iris *iris; > + struct completion iris_assigned; > > struct regulator_bulk_data *vregs; > size_t num_vregs; > @@ -146,6 +147,7 @@ void qcom_wcnss_assign_iris(struct qcom_wcnss *wcnss, > > wcnss->iris = iris; > wcnss->use_48mhz_xo = use_48mhz_xo; > + complete(&wcnss->iris_assigned); > > mutex_unlock(&wcnss->iris_lock); Do you need this mutex anymore then? It looks like assign and start are synchronized with the completion variable now. -- To unsubscribe from this list: send the line "unsubscribe linux-arm-msm" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/drivers/remoteproc/qcom_wcnss.c b/drivers/remoteproc/qcom_wcnss.c index b0e07e9..e5fbf91 100644 --- a/drivers/remoteproc/qcom_wcnss.c +++ b/drivers/remoteproc/qcom_wcnss.c @@ -86,6 +86,7 @@ struct qcom_wcnss { struct mutex iris_lock; struct qcom_iris *iris; + struct completion iris_assigned; struct regulator_bulk_data *vregs; size_t num_vregs; @@ -146,6 +147,7 @@ void qcom_wcnss_assign_iris(struct qcom_wcnss *wcnss, wcnss->iris = iris; wcnss->use_48mhz_xo = use_48mhz_xo; + complete(&wcnss->iris_assigned); mutex_unlock(&wcnss->iris_lock); } @@ -221,6 +223,13 @@ static int wcnss_start(struct rproc *rproc) struct qcom_wcnss *wcnss = (struct qcom_wcnss *)rproc->priv; int ret; + ret = wait_for_completion_timeout(&wcnss->iris_assigned, + msecs_to_jiffies(5000)); + if (ret == 0) { + dev_err(wcnss->dev, "Timeout waiting for iris device\n"); + return -ENODEV; + } + mutex_lock(&wcnss->iris_lock); if (!wcnss->iris) { dev_err(wcnss->dev, "no iris registered\n"); @@ -496,6 +505,7 @@ static int wcnss_probe(struct platform_device *pdev) init_completion(&wcnss->start_done); init_completion(&wcnss->stop_done); + init_completion(&wcnss->iris_assigned); mutex_init(&wcnss->iris_lock);
wcnss_start fails when called by remoteproc before iris probing. Fix this by adding synchronization/completion on iris assignment. Signed-off-by: Loic Poulain <loic.poulain@linaro.org> --- drivers/remoteproc/qcom_wcnss.c | 10 ++++++++++ 1 file changed, 10 insertions(+) -- 2.7.4 -- To unsubscribe from this list: send the line "unsubscribe linux-arm-msm" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html