linux-kernel - [PATCH v2 3/4] media: mediatek: vcodec: Update mtk_vcodec_mem

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Date: Thu, 21 Dec 2023 17:17:45 +0800
From: Fei Shao <fshao@...omium.org>
To: Hans Verkuil <hverkuil-cisco@...all.nl>,
	AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
Cc: Fei Shao <fshao@...omium.org>,
	Andrew-CT Chen <andrew-ct.chen@...iatek.com>,
	Matthias Brugger <matthias.bgg@...il.com>,
	Mauro Carvalho Chehab <mchehab@...nel.org>,
	Nicolas Dufresne <nicolas.dufresne@...labora.com>,
	Tiffany Lin <tiffany.lin@...iatek.com>,
	Yunfei Dong <yunfei.dong@...iatek.com>,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	linux-media@...r.kernel.org,
	linux-mediatek@...ts.infradead.org
Subject: [PATCH v2 3/4] media: mediatek: vcodec: Update mtk_vcodec_mem_free() error messages

In mtk_vcodec_mem_free(), there are two cases where a NULL VA is passed:
- mem->size == 0: we are called to free no memory. This may happen when
  we call mtk_vcodec_mem_free() twice or the memory has never been
  allocated.
- mem->size > 0: we are called to free memory but without VA. This means
  that we failed to free the memory for real.

Both cases are not expected to happen, and we want to have clearer error
messages to describe which one we just encountered.
Update the error messages to include more information for that purpose.

Signed-off-by: Fei Shao <fshao@...omium.org>
---

Changes in v2:
- update the error messages based on the suggestion

 .../media/platform/mediatek/vcodec/common/mtk_vcodec_util.c  | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/media/platform/mediatek/vcodec/common/mtk_vcodec_util.c b/drivers/media/platform/mediatek/vcodec/common/mtk_vcodec_util.c
index 23bea2702c9a..c60e4c193b25 100644
--- a/drivers/media/platform/mediatek/vcodec/common/mtk_vcodec_util.c
+++ b/drivers/media/platform/mediatek/vcodec/common/mtk_vcodec_util.c
@@ -96,8 +96,9 @@ void mtk_vcodec_mem_free(void *priv, struct mtk_vcodec_mem *mem)
 	}
 
 	if (!mem->va) {
-		mtk_v4l2_err(plat_dev, "%s dma_free size=0x%zx failed!",
-			     __func__, mem->size);
+		mtk_v4l2_err(plat_dev, "%s: Tried to free a NULL VA", __func__);
+		if (mem->size)
+			mtk_v4l2_err(plat_dev, "Failed to free %zu bytes", mem->size);
 		return;
 	}
 
-- 
2.43.0.472.g3155946c3a-goog