From nobody Thu Sep 19 19:39:37 2024 Received: from madrid.collaboradmins.com (madrid.collaboradmins.com [46.235.227.194]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 5979620EB; Mon, 20 May 2024 11:27:29 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=46.235.227.194 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1716204450; cv=none; b=uhDLHpCSXqecXcqB7bWiGsvlU66pMJz1eIe1fxpzCFtbn6NH3cNAxGBMFy0PoRV82dUMpT6o+cGKhAgEmQZRdDlG5Pk+Do2bj95XfJDtnhuu8Mebkeq5tHs/BPGhfJ5j4pRyXD96L+3g/As5OQSOrT9L7jdaO1JxT0ircUZk01o= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1716204450; c=relaxed/simple; bh=TugNqe9PlBp1NJ5MSXmFZQM1MVvwZOYkkhks49lJzMo=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=DD9jinDQqwWn5Fvox/0vISKfJ8iJmtA8Zd5g5zxN96vlPFe3f9bMqe7k42iNJv9Z05tYRBpZeDAjoZWcufFoSn+JuyZtn94H8XEPgphmavLW79ruPzc/QsKChp9MvlqwJXQl5IKBWpcdpgnHf0d5tvR1znUtVT5BIEbfsL1pOHM= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=collabora.com; spf=pass smtp.mailfrom=collabora.com; dkim=pass (2048-bit key) header.d=collabora.com header.i=@collabora.com header.b=nr8DTS66; arc=none smtp.client-ip=46.235.227.194 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=collabora.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=collabora.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=collabora.com header.i=@collabora.com header.b="nr8DTS66" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1716204447; bh=TugNqe9PlBp1NJ5MSXmFZQM1MVvwZOYkkhks49lJzMo=; h=From:To:Cc:Subject:Date:From; b=nr8DTS66gLZaW4X+w+Uv/tuKcFUStU+GvdhLQPuJsWF6N2J/AeLKzJlaCrbdHeHPV wF5qZXK6qH+0otnO0KZePovIQZ5wUUgttPqRj2H6m8VwcZ1YM8LS4q9WOzzEynsqP2 UGGc5ix3SAGst/HSwDWh42aF/JikrXPbYVYLP4h08H4mZC56+mjjvjg2kIOvRI2d86 MgcnZoUoZqoaQZOTFxaGXyP8IGMFjEl/KMqob1R81lGCyqGv6cDieiANg5HB1rL4ti /jFfJJ8P5zLGngFoaKGvNEVS/TjoPC0OpL5vzOzwnezaKC7cr81KjZevPwqUQXUDb5 F/raaUKoD42vg== Received: from IcarusMOD.eternityproject.eu (cola.collaboradmins.com [195.201.22.229]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) (Authenticated sender: kholk11) by madrid.collaboradmins.com (Postfix) with ESMTPSA id D88DD3780BFE; Mon, 20 May 2024 11:27:26 +0000 (UTC) From: AngeloGioacchino Del Regno To: mathieu.poirier@linaro.org Cc: andersson@kernel.org, matthias.bgg@gmail.com, angelogioacchino.delregno@collabora.com, linux-remoteproc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, kernel@collabora.com Subject: [PATCH] remoteproc: mediatek: Zero out only remaining bytes of IPI buffer Date: Mon, 20 May 2024 13:27:24 +0200 Message-ID: <20240520112724.139945-1-angelogioacchino.delregno@collabora.com> X-Mailer: git-send-email 2.45.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" 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 Acked-by: Mukesh Ojha --- 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; } =20 - 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); =20 --=20 2.45.1