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Message-ID: <20240801000834.3930818-57-sashal@kernel.org>
Date: Wed, 31 Jul 2024 19:59:55 -0400
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org,
stable@...r.kernel.org
Cc: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
Mathieu Poirier <mathieu.poirier@...aro.org>,
Sasha Levin <sashal@...nel.org>,
andersson@...nel.org,
matthias.bgg@...il.com,
linux-remoteproc@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org,
linux-mediatek@...ts.infradead.org
Subject: [PATCH AUTOSEL 6.10 057/121] remoteproc: mediatek: Zero out only remaining bytes of IPI buffer
From: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
[ Upstream commit 9dbd9962cfe56d210be5232349851420b5f9c8f6 ]
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>
Link: https://lore.kernel.org/r/20240520112724.139945-1-angelogioacchino.delregno@collabora.com
Signed-off-by: Mathieu Poirier <mathieu.poirier@...aro.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
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 b8498772dba17..b885a9a041e48 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);
--
2.43.0
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