[PATCH 2/8] remoteproc: k3-dsp: Add devm action to release reserved memory

[Andrew Davis]

Use a device lifecycle managed action to release reserved memory. This
helps prevent mistakes like releasing out of order in cleanup functions
and forgetting to release on error paths.

Signed-off-by: Andrew Davis <a...@ti.com>
---
 drivers/remoteproc/ti_k3_dsp_remoteproc.c | 20 ++++++++++++--------
 1 file changed, 12 insertions(+), 8 deletions(-)

diff --git a/drivers/remoteproc/ti_k3_dsp_remoteproc.c 
b/drivers/remoteproc/ti_k3_dsp_remoteproc.c
index 93fbc89307d6a..0cb00146fe977 100644
--- a/drivers/remoteproc/ti_k3_dsp_remoteproc.c
+++ b/drivers/remoteproc/ti_k3_dsp_remoteproc.c
@@ -550,6 +550,13 @@ static int k3_dsp_rproc_of_get_memories(struct 
platform_device *pdev,
        return 0;
 }
 
+static void k3_dsp_mem_release(void *data)
+{
+       struct device *dev = data;
+
+       of_reserved_mem_device_release(dev);
+}
+
 static int k3_dsp_reserved_mem_init(struct k3_dsp_rproc *kproc)
 {
        struct device *dev = kproc->dev;
@@ -579,13 +586,14 @@ static int k3_dsp_reserved_mem_init(struct k3_dsp_rproc 
*kproc)
                        ERR_PTR(ret));
                return ret;
        }
+       ret = devm_add_action_or_reset(dev, k3_dsp_mem_release, dev);
+       if (ret)
+               return ret;
 
        num_rmems--;
        kproc->rmem = kcalloc(num_rmems, sizeof(*kproc->rmem), GFP_KERNEL);
-       if (!kproc->rmem) {
-               ret = -ENOMEM;
-               goto release_rmem;
-       }
+       if (!kproc->rmem)
+               return -ENOMEM;
 
        /* use remaining reserved memory regions for static carveouts */
        for (i = 0; i < num_rmems; i++) {
@@ -628,8 +636,6 @@ static int k3_dsp_reserved_mem_init(struct k3_dsp_rproc 
*kproc)
        for (i--; i >= 0; i--)
                iounmap(kproc->rmem[i].cpu_addr);
        kfree(kproc->rmem);
-release_rmem:
-       of_reserved_mem_device_release(kproc->dev);
        return ret;
 }
 
@@ -640,8 +646,6 @@ static void k3_dsp_reserved_mem_exit(struct k3_dsp_rproc 
*kproc)
        for (i = 0; i < kproc->num_rmems; i++)
                iounmap(kproc->rmem[i].cpu_addr);
        kfree(kproc->rmem);
-
-       of_reserved_mem_device_release(kproc->dev);
 }
 
 static
-- 
2.39.2