[PATCH 3/7] remoteproc: keystone: Use devm action to release reserved memory

[Andrew Davis]

This helps prevent mistakes like freeing out of order in cleanup functions
and forgetting to free on error paths.

Signed-off-by: Andrew Davis <a...@ti.com>
---
 drivers/remoteproc/keystone_remoteproc.c | 17 ++++++++++++++---
 1 file changed, 14 insertions(+), 3 deletions(-)

diff --git a/drivers/remoteproc/keystone_remoteproc.c 
b/drivers/remoteproc/keystone_remoteproc.c
index 8f0f7a4cfef26..033e573544fef 100644
--- a/drivers/remoteproc/keystone_remoteproc.c
+++ b/drivers/remoteproc/keystone_remoteproc.c
@@ -358,6 +358,13 @@ static int keystone_rproc_of_get_dev_syscon(struct 
platform_device *pdev,
        return 0;
 }
 
+static void keystone_rproc_mem_release(void *data)
+{
+       struct device *dev = data;
+
+       of_reserved_mem_device_release(dev);
+}
+
 static int keystone_rproc_probe(struct platform_device *pdev)
 {
        struct device *dev = &pdev->dev;
@@ -434,8 +441,14 @@ static int keystone_rproc_probe(struct platform_device 
*pdev)
                goto disable_clk;
        }
 
-       if (of_reserved_mem_device_init(dev))
+       ret = of_reserved_mem_device_init(dev);
+       if (ret) {
                dev_warn(dev, "device does not have specific CMA pool\n");
+       } else {
+               ret = devm_add_action_or_reset(dev, keystone_rproc_mem_release, 
dev);
+               if (ret)
+                       return ret;
+       }
 
        /* ensure the DSP is in reset before loading firmware */
        ret = reset_control_status(ksproc->reset);
@@ -459,7 +472,6 @@ static int keystone_rproc_probe(struct platform_device 
*pdev)
        return 0;
 
 release_mem:
-       of_reserved_mem_device_release(dev);
        gpiod_put(ksproc->kick_gpio);
 disable_clk:
        pm_runtime_put_sync(dev);
@@ -476,7 +488,6 @@ static void keystone_rproc_remove(struct platform_device 
*pdev)
        gpiod_put(ksproc->kick_gpio);
        pm_runtime_put_sync(&pdev->dev);
        pm_runtime_disable(&pdev->dev);
-       of_reserved_mem_device_release(&pdev->dev);
 }
 
 static const struct of_device_id keystone_rproc_of_match[] = {
-- 
2.39.2