linux-kernel - [PATCH] mtd: lpddr: Added literal suffix

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Date:   Thu, 17 Nov 2022 15:36:25 +0300
From:   Denis Arefev <arefev@...mel.ru>
To:     Miquel Raynal <miquel.raynal@...tlin.com>
Cc:     Richard Weinberger <richard@....at>,
        Vignesh Raghavendra <vigneshr@...com>,
        linux-mtd@...ts.infradead.org, linux-kernel@...r.kernel.org,
        lvc-project@...uxtesting.org, trufanov@...mel.ru, vfh@...mel.ru
Subject: [PATCH] mtd: lpddr: Added literal suffix

The value of an arithmetic expression
1 << lpddr->qinfo->DevSizeShift is subject to overflow
due to a failure to cast operands to a larger data
type before perfoming arithmetic

Signed-off-by: Denis Arefev <arefev@...mel.ru>
---
 drivers/mtd/lpddr/lpddr_cmds.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/mtd/lpddr/lpddr_cmds.c b/drivers/mtd/lpddr/lpddr_cmds.c
index ee063baed136..360b2af8340b 100644
--- a/drivers/mtd/lpddr/lpddr_cmds.c
+++ b/drivers/mtd/lpddr/lpddr_cmds.c
@@ -61,7 +61,7 @@ struct mtd_info *lpddr_cmdset(struct map_info *map)
 		mtd->_point = lpddr_point;
 		mtd->_unpoint = lpddr_unpoint;
 	}
-	mtd->size = 1 << lpddr->qinfo->DevSizeShift;
+	mtd->size = 1UL << lpddr->qinfo->DevSizeShift;
 	mtd->erasesize = 1 << lpddr->qinfo->UniformBlockSizeShift;
 	mtd->writesize = 1 << lpddr->qinfo->BufSizeShift;
 
-- 
2.25.1