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Message-Id: <1475455600-31689-1-git-send-email-bjorn.andersson@linaro.org>
Date: Sun, 2 Oct 2016 17:46:38 -0700
From: Bjorn Andersson <bjorn.andersson@...aro.org>
To: Ohad Ben-Cohen <ohad@...ery.com>,
Bjorn Andersson <bjorn.andersson@...aro.org>,
Patrice Chotard <patrice.chotard@...com>
Cc: Jonathan Corbet <corbet@....net>, Suman Anna <s-anna@...com>,
linux-remoteproc@...r.kernel.org, linux-doc@...r.kernel.org,
linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: [PATCH 1/2] remoteproc: Split driver and consumer dereferencing
In order to be able to lock a rproc driver implementations only when
used by a client, we must differ between the dereference operation of a
client and the implementation itself.
This patch brings no functional change.
Signed-off-by: Bjorn Andersson <bjorn.andersson@...aro.org>
---
Documentation/remoteproc.txt | 6 +++---
drivers/remoteproc/da8xx_remoteproc.c | 4 ++--
drivers/remoteproc/omap_remoteproc.c | 4 ++--
drivers/remoteproc/qcom_q6v5_pil.c | 4 ++--
drivers/remoteproc/qcom_wcnss.c | 4 ++--
drivers/remoteproc/remoteproc_core.c | 21 ++++++++++++++++++---
drivers/remoteproc/st_remoteproc.c | 4 ++--
drivers/remoteproc/ste_modem_rproc.c | 4 ++--
drivers/remoteproc/wkup_m3_rproc.c | 4 ++--
include/linux/remoteproc.h | 1 +
10 files changed, 36 insertions(+), 20 deletions(-)
diff --git a/Documentation/remoteproc.txt b/Documentation/remoteproc.txt
index ef0219fa4bb4..f07597482351 100644
--- a/Documentation/remoteproc.txt
+++ b/Documentation/remoteproc.txt
@@ -101,9 +101,9 @@ int dummy_rproc_example(struct rproc *my_rproc)
On success, the new rproc is returned, and on failure, NULL.
Note: _never_ directly deallocate @rproc, even if it was not registered
- yet. Instead, when you need to unroll rproc_alloc(), use rproc_put().
+ yet. Instead, when you need to unroll rproc_alloc(), use rproc_free().
- void rproc_put(struct rproc *rproc)
+ void rproc_free(struct rproc *rproc)
- Free an rproc handle that was allocated by rproc_alloc.
This function essentially unrolls rproc_alloc(), by decrementing the
rproc's refcount. It doesn't directly free rproc; that would happen
@@ -131,7 +131,7 @@ int dummy_rproc_example(struct rproc *my_rproc)
has completed successfully.
After rproc_del() returns, @rproc is still valid, and its
- last refcount should be decremented by calling rproc_put().
+ last refcount should be decremented by calling rproc_free().
Returns 0 on success and -EINVAL if @rproc isn't valid.
diff --git a/drivers/remoteproc/da8xx_remoteproc.c b/drivers/remoteproc/da8xx_remoteproc.c
index 12823d078e1e..1afac8f31be0 100644
--- a/drivers/remoteproc/da8xx_remoteproc.c
+++ b/drivers/remoteproc/da8xx_remoteproc.c
@@ -261,7 +261,7 @@ static int da8xx_rproc_probe(struct platform_device *pdev)
return 0;
free_rproc:
- rproc_put(rproc);
+ rproc_free(rproc);
return ret;
}
@@ -290,7 +290,7 @@ static int da8xx_rproc_remove(struct platform_device *pdev)
disable_irq(drproc->irq);
rproc_del(rproc);
- rproc_put(rproc);
+ rproc_free(rproc);
return 0;
}
diff --git a/drivers/remoteproc/omap_remoteproc.c b/drivers/remoteproc/omap_remoteproc.c
index 01e234cb9157..fa63bf2eb885 100644
--- a/drivers/remoteproc/omap_remoteproc.c
+++ b/drivers/remoteproc/omap_remoteproc.c
@@ -215,7 +215,7 @@ static int omap_rproc_probe(struct platform_device *pdev)
return 0;
free_rproc:
- rproc_put(rproc);
+ rproc_free(rproc);
return ret;
}
@@ -224,7 +224,7 @@ static int omap_rproc_remove(struct platform_device *pdev)
struct rproc *rproc = platform_get_drvdata(pdev);
rproc_del(rproc);
- rproc_put(rproc);
+ rproc_free(rproc);
return 0;
}
diff --git a/drivers/remoteproc/qcom_q6v5_pil.c b/drivers/remoteproc/qcom_q6v5_pil.c
index 05b04573e87d..2e0caaaa766a 100644
--- a/drivers/remoteproc/qcom_q6v5_pil.c
+++ b/drivers/remoteproc/qcom_q6v5_pil.c
@@ -875,7 +875,7 @@ static int q6v5_probe(struct platform_device *pdev)
return 0;
free_rproc:
- rproc_put(rproc);
+ rproc_free(rproc);
return ret;
}
@@ -885,7 +885,7 @@ static int q6v5_remove(struct platform_device *pdev)
struct q6v5 *qproc = platform_get_drvdata(pdev);
rproc_del(qproc->rproc);
- rproc_put(qproc->rproc);
+ rproc_free(qproc->rproc);
return 0;
}
diff --git a/drivers/remoteproc/qcom_wcnss.c b/drivers/remoteproc/qcom_wcnss.c
index 1917de7db91c..f5cedeaafba1 100644
--- a/drivers/remoteproc/qcom_wcnss.c
+++ b/drivers/remoteproc/qcom_wcnss.c
@@ -585,7 +585,7 @@ static int wcnss_probe(struct platform_device *pdev)
return of_platform_populate(pdev->dev.of_node, NULL, NULL, &pdev->dev);
free_rproc:
- rproc_put(rproc);
+ rproc_free(rproc);
return ret;
}
@@ -598,7 +598,7 @@ static int wcnss_remove(struct platform_device *pdev)
qcom_smem_state_put(wcnss->state);
rproc_del(wcnss->rproc);
- rproc_put(wcnss->rproc);
+ rproc_free(wcnss->rproc);
return 0;
}
diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c
index 3da566b0d437..ede3af14b9d0 100644
--- a/drivers/remoteproc/remoteproc_core.c
+++ b/drivers/remoteproc/remoteproc_core.c
@@ -1307,7 +1307,7 @@ static struct device_type rproc_type = {
* On success the new rproc is returned, and on failure, NULL.
*
* Note: _never_ directly deallocate @rproc, even if it was not registered
- * yet. Instead, when you need to unroll rproc_alloc(), use rproc_put().
+ * yet. Instead, when you need to unroll rproc_alloc(), use rproc_free().
*/
struct rproc *rproc_alloc(struct device *dev, const char *name,
const struct rproc_ops *ops,
@@ -1386,7 +1386,22 @@ struct rproc *rproc_alloc(struct device *dev, const char *name,
EXPORT_SYMBOL(rproc_alloc);
/**
- * rproc_put() - unroll rproc_alloc()
+ * rproc_free() - unroll rproc_alloc()
+ * @rproc: the remote processor handle
+ *
+ * This function decrements the rproc dev refcount.
+ *
+ * If no one holds any reference to rproc anymore, then its refcount would
+ * now drop to zero, and it would be freed.
+ */
+void rproc_free(struct rproc *rproc)
+{
+ put_device(&rproc->dev);
+}
+EXPORT_SYMBOL(rproc_free);
+
+/**
+ * rproc_put() - release rproc reference
* @rproc: the remote processor handle
*
* This function decrements the rproc dev refcount.
@@ -1411,7 +1426,7 @@ EXPORT_SYMBOL(rproc_put);
*
* After rproc_del() returns, @rproc isn't freed yet, because
* of the outstanding reference created by rproc_alloc. To decrement that
- * one last refcount, one still needs to call rproc_put().
+ * one last refcount, one still needs to call rproc_free().
*
* Returns 0 on success and -EINVAL if @rproc isn't valid.
*/
diff --git a/drivers/remoteproc/st_remoteproc.c b/drivers/remoteproc/st_remoteproc.c
index 6f056caa8a56..ae8963fcc8c8 100644
--- a/drivers/remoteproc/st_remoteproc.c
+++ b/drivers/remoteproc/st_remoteproc.c
@@ -262,7 +262,7 @@ static int st_rproc_probe(struct platform_device *pdev)
return 0;
free_rproc:
- rproc_put(rproc);
+ rproc_free(rproc);
return ret;
}
@@ -277,7 +277,7 @@ static int st_rproc_remove(struct platform_device *pdev)
of_reserved_mem_device_release(&pdev->dev);
- rproc_put(rproc);
+ rproc_free(rproc);
return 0;
}
diff --git a/drivers/remoteproc/ste_modem_rproc.c b/drivers/remoteproc/ste_modem_rproc.c
index 53dc17bdd54e..03d69a9a3c5b 100644
--- a/drivers/remoteproc/ste_modem_rproc.c
+++ b/drivers/remoteproc/ste_modem_rproc.c
@@ -257,7 +257,7 @@ static int sproc_drv_remove(struct platform_device *pdev)
rproc_del(sproc->rproc);
dma_free_coherent(sproc->rproc->dev.parent, SPROC_FW_SIZE,
sproc->fw_addr, sproc->fw_dma_addr);
- rproc_put(sproc->rproc);
+ rproc_free(sproc->rproc);
mdev->drv_data = NULL;
@@ -325,7 +325,7 @@ static int sproc_probe(struct platform_device *pdev)
free_rproc:
/* Reset device data upon error */
mdev->drv_data = NULL;
- rproc_put(rproc);
+ rproc_free(rproc);
return err;
}
diff --git a/drivers/remoteproc/wkup_m3_rproc.c b/drivers/remoteproc/wkup_m3_rproc.c
index 3811cb522af3..18175d0331fd 100644
--- a/drivers/remoteproc/wkup_m3_rproc.c
+++ b/drivers/remoteproc/wkup_m3_rproc.c
@@ -208,7 +208,7 @@ static int wkup_m3_rproc_probe(struct platform_device *pdev)
return 0;
err_put_rproc:
- rproc_put(rproc);
+ rproc_free(rproc);
err:
pm_runtime_put_noidle(dev);
pm_runtime_disable(dev);
@@ -220,7 +220,7 @@ static int wkup_m3_rproc_remove(struct platform_device *pdev)
struct rproc *rproc = platform_get_drvdata(pdev);
rproc_del(rproc);
- rproc_put(rproc);
+ rproc_free(rproc);
pm_runtime_put_sync(&pdev->dev);
pm_runtime_disable(&pdev->dev);
diff --git a/include/linux/remoteproc.h b/include/linux/remoteproc.h
index c321eab5054e..930023b7c825 100644
--- a/include/linux/remoteproc.h
+++ b/include/linux/remoteproc.h
@@ -493,6 +493,7 @@ struct rproc *rproc_alloc(struct device *dev, const char *name,
void rproc_put(struct rproc *rproc);
int rproc_add(struct rproc *rproc);
int rproc_del(struct rproc *rproc);
+void rproc_free(struct rproc *rproc);
int rproc_boot(struct rproc *rproc);
void rproc_shutdown(struct rproc *rproc);
--
2.5.0
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