linux-kernel - [PATCH 5.10 28/96] ASoC: SOF: Intel: hda-ipc: fix reply size checking

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Message-Id: <20210816125435.880081652@linuxfoundation.org>
Date:   Mon, 16 Aug 2021 15:01:38 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Ranjani Sridharan <ranjani.sridharan@...ux.intel.com>,
        Guennadi Liakhovetski <guennadi.liakhovetski@...ux.intel.com>,
        Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>,
        Mark Brown <broonie@...nel.org>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.10 28/96] ASoC: SOF: Intel: hda-ipc: fix reply size checking

From: Guennadi Liakhovetski <guennadi.liakhovetski@...ux.intel.com>

[ Upstream commit 973b393fdf073a4ebd8d82ef6edea99fedc74af9 ]

Checking that two values don't have common bits makes no sense,
strict equality is meant.

Fixes: f3b433e4699f  ("ASoC: SOF: Implement Probe IPC API")
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@...ux.intel.com>
Signed-off-by: Guennadi Liakhovetski <guennadi.liakhovetski@...ux.intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
Link: https://lore.kernel.org/r/20210802151749.15417-1-pierre-louis.bossart@linux.intel.com
Signed-off-by: Mark Brown <broonie@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 sound/soc/sof/intel/hda-ipc.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/sound/soc/sof/intel/hda-ipc.c b/sound/soc/sof/intel/hda-ipc.c
index c91aa951df22..acfeca42604c 100644
--- a/sound/soc/sof/intel/hda-ipc.c
+++ b/sound/soc/sof/intel/hda-ipc.c
@@ -107,8 +107,8 @@ void hda_dsp_ipc_get_reply(struct snd_sof_dev *sdev)
 	} else {
 		/* reply correct size ? */
 		if (reply.hdr.size != msg->reply_size &&
-			/* getter payload is never known upfront */
-			!(reply.hdr.cmd & SOF_IPC_GLB_PROBE)) {
+		    /* getter payload is never known upfront */
+		    ((reply.hdr.cmd & SOF_GLB_TYPE_MASK) != SOF_IPC_GLB_PROBE)) {
 			dev_err(sdev->dev, "error: reply expected %zu got %u bytes\n",
 				msg->reply_size, reply.hdr.size);
 			ret = -EINVAL;
-- 
2.30.2