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Date:   Wed, 22 Nov 2017 01:58:12 +0000
From:   Ben Hutchings <ben@...adent.org.uk>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC:     akpm@...ux-foundation.org,
        "Colin Ian King" <colin.king@...onical.com>,
        "Greg Kroah-Hartman" <gregkh@...uxfoundation.org>
Subject: [PATCH 3.16 045/133] staging/rts5208: fix incorrect shift to
 extract upper nybble

3.16.51-rc1 review patch.  If anyone has any objections, please let me know.

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

From: Colin Ian King <colin.king@...onical.com>

commit 34ff1bf4920471cff66775dc39537b15c5f0feff upstream.

The mask of sns_key_info1 suggests the upper nybble is being extracted
however the following shift of 8 bits is too large and always results in
0.  Fix this by shifting only by 4 bits to correctly get the upper nybble.

Detected by CoverityScan, CID#142891 ("Operands don't affect result")

Fixes: fa590c222fba ("staging: rts5208: add support for rts5208 and rts5288")
Signed-off-by: Colin Ian King <colin.king@...onical.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 drivers/staging/rts5208/rtsx_scsi.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/staging/rts5208/rtsx_scsi.c
+++ b/drivers/staging/rts5208/rtsx_scsi.c
@@ -417,7 +417,7 @@ void set_sense_data(struct rtsx_chip *ch
 	sense->ascq = ascq;
 	if (sns_key_info0 != 0) {
 		sense->sns_key_info[0] = SKSV | sns_key_info0;
-		sense->sns_key_info[1] = (sns_key_info1 & 0xf0) >> 8;
+		sense->sns_key_info[1] = (sns_key_info1 & 0xf0) >> 4;
 		sense->sns_key_info[2] = sns_key_info1 & 0x0f;
 	}
 }

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