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Message-ID: <20240520112724.139945-1-angelogioacchino.delregno@collabora.com>
Date: Mon, 20 May 2024 13:27:24 +0200
From: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
To: mathieu.poirier@...aro.org
Cc: andersson@...nel.org,
matthias.bgg@...il.com,
angelogioacchino.delregno@...labora.com,
linux-remoteproc@...r.kernel.org,
linux-kernel@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org,
linux-mediatek@...ts.infradead.org,
kernel@...labora.com
Subject: [PATCH] remoteproc: mediatek: Zero out only remaining bytes of IPI buffer
In scp_ipi_handler(), instead of zeroing out the entire shared
buffer, which may be as large as 600 bytes, overwrite it with the
received data, then zero out only the remaining bytes.
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
---
drivers/remoteproc/mtk_scp.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/remoteproc/mtk_scp.c b/drivers/remoteproc/mtk_scp.c
index e5214d43181e..dc70cf7db44d 100644
--- a/drivers/remoteproc/mtk_scp.c
+++ b/drivers/remoteproc/mtk_scp.c
@@ -117,8 +117,8 @@ static void scp_ipi_handler(struct mtk_scp *scp)
return;
}
- memset(scp->share_buf, 0, scp_sizes->ipi_share_buffer_size);
memcpy_fromio(scp->share_buf, &rcv_obj->share_buf, len);
+ memset(&scp->share_buf[len], 0, scp_sizes->ipi_share_buffer_size - len);
handler(scp->share_buf, len, ipi_desc[id].priv);
scp_ipi_unlock(scp, id);
--
2.45.1
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