Re: [PATCH v4] amdgpu: remove unnecessary condition check

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Am 21.04.20 um 14:22 schrieb Bernard Zhao:
There is no need to if check again, maybe we could merge
into the above else branch.

Signed-off-by: Bernard Zhao <bernard@xxxxxxxx>

You could improve the subject line and commit message a bit, e.g. something like:

[PATCH] drm/amdgpu: cleanup coding style in amdkfd a bit

Make the code a bit more readable by using a common error handling pattern.


With that done the patch is Reviewed-by: Christian König <christian.koenig@xxxxxxx>.


Changes since V1:
*commit message improve
*code style refactoring

Changes since V2:
*code style adjust

Changes since V3:
*find the best way to merge unnecessary if/else check branch

Link for V1:
*https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Flore.kernel.org%2Fpatchwork%2Fpatch%2F1226587%2F&amp;data=02%7C01%7Cchristian.koenig%40amd.com%7C6b521b697ea84cfd324308d7e5eeab7f%7C3dd8961fe4884e608e11a82d994e183d%7C0%7C0%7C637230685564330098&amp;sdata=m2lhfgcINuB%2BT3%2BhhQjtROI3Zp38QDEilF9RTceg3HY%3D&amp;reserved=0
---
  .../gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c  | 20 +++++++++----------
  1 file changed, 9 insertions(+), 11 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
index 9dff792c9290..acb612c53b9c 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
@@ -660,15 +660,15 @@ static int reserve_bo_and_vm(struct kgd_mem *mem,
ret = ttm_eu_reserve_buffers(&ctx->ticket, &ctx->list,
  				     false, &ctx->duplicates);
-	if (!ret)
-		ctx->reserved = true;
-	else {
-		pr_err("Failed to reserve buffers in ttm\n");
+	if (ret) {
+		pr_err("Failed to reserve buffers in ttm.\n");
  		kfree(ctx->vm_pd);
  		ctx->vm_pd = NULL;
+		return ret;
  	}
- return ret;
+	ctx->reserved = true;
+	return 0;
  }
/**
@@ -733,17 +733,15 @@ static int reserve_bo_and_cond_vms(struct kgd_mem *mem,
ret = ttm_eu_reserve_buffers(&ctx->ticket, &ctx->list,
  				     false, &ctx->duplicates);
-	if (!ret)
-		ctx->reserved = true;
-	else
-		pr_err("Failed to reserve buffers in ttm.\n");
-
  	if (ret) {
+		pr_err("Failed to reserve buffers in ttm.\n");
  		kfree(ctx->vm_pd);
  		ctx->vm_pd = NULL;
+		return ret;
  	}
- return ret;
+	ctx->reserved = true;
+	return 0;
  }
/**

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