linux-kernel - [PATCH 4.9 125/206] ASoC: Intel: Skylake: Fix a shift wrapping bug

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Message-Id: <20170110131508.434496403@linuxfoundation.org>
Date:   Tue, 10 Jan 2017 14:36:48 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Dan Carpenter <dan.carpenter@...cle.com>,
        Vinod Koul <vinod.koul@...el.com>,
        Kranthi G <gudishax.kranthikumar@...el.com>,
        Mark Brown <broonie@...nel.org>
Subject: [PATCH 4.9 125/206] ASoC: Intel: Skylake: Fix a shift wrapping bug

4.9-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Dan Carpenter <dan.carpenter@...cle.com>

commit c8eabf821cac120afb78ca251b07cbf520406a7e upstream.

"*val" is a u64.  It definitely looks like we intend to use the high 32
bits as well.

Fixes: 700a9a63f9c1 ("ASoC: Intel: Skylake: Add module instance id generation APIs")
Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
Acked-by: Vinod Koul <vinod.koul@...el.com>
Tested-by: Kranthi G <gudishax.kranthikumar@...el.com>
Signed-off-by: Mark Brown <broonie@...nel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 sound/soc/intel/skylake/skl-sst-utils.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/sound/soc/intel/skylake/skl-sst-utils.c
+++ b/sound/soc/intel/skylake/skl-sst-utils.c
@@ -179,7 +179,7 @@ static inline int skl_getid_32(struct uu
 		index = ffz(mask_val);
 		pvt_id = index + word1_mask + word2_mask;
 		if (pvt_id <= (max_inst - 1)) {
-			*val |= 1 << (index + word1_mask);
+			*val |= 1ULL << (index + word1_mask);
 			return pvt_id;
 		}
 	}