Re: [PATCH v3 1/3] remoteproc: k3-r5: Use devm_rproc_alloc() helper

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Hi Andrew,

On 07/08/24 19:07, Andrew Davis wrote:
On 8/7/24 1:22 AM, Beleswar Padhi wrote:
Use the device lifecycle managed allocation function. This helps prevent
mistakes like freeing out of order in cleanup functions and forgetting
to free on error paths.

Signed-off-by: Beleswar Padhi <b-padhi@xxxxxx>
---
  drivers/remoteproc/ti_k3_r5_remoteproc.c | 6 ++----
  1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/remoteproc/ti_k3_r5_remoteproc.c b/drivers/remoteproc/ti_k3_r5_remoteproc.c
index 39a47540c590..dbcd8840ae8d 100644
--- a/drivers/remoteproc/ti_k3_r5_remoteproc.c
+++ b/drivers/remoteproc/ti_k3_r5_remoteproc.c
@@ -1259,8 +1259,8 @@ static int k3_r5_cluster_rproc_init(struct platform_device *pdev)
              goto out;
          }
  -        rproc = rproc_alloc(cdev, dev_name(cdev), &k3_r5_rproc_ops,
-                    fw_name, sizeof(*kproc));
+        rproc = devm_rproc_alloc(cdev, dev_name(cdev), &k3_r5_rproc_ops,
+                     fw_name, sizeof(*kproc));
          if (!rproc) {
              ret = -ENOMEM;
              goto out;
@@ -1352,7 +1352,6 @@ static int k3_r5_cluster_rproc_init(struct platform_device *pdev)
  err_add:
      k3_r5_reserved_mem_exit(kproc);
  err_config:
-    rproc_free(rproc);
      core->rproc = NULL;

I'd remove this line too, we don't check for NULL later, we check
core->rproc->status, which will cause a nullptr dereference error
instead of correctly detecting that the core is "offline".


Thanks for catching this! Will post revision with this change.


Same below.

Andrew

  out:
      /* undo core0 upon any failures on core1 in split-mode */
@@ -1399,7 +1398,6 @@ static void k3_r5_cluster_rproc_exit(void *data)
            k3_r5_reserved_mem_exit(kproc);
  -        rproc_free(rproc);
          core->rproc = NULL;
      }
  }




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