linux-kernel - [PATCH 4.12 11/65] mtd: nand: Declare tBERS, tR and tPROG as u64 to avoid integer overflow

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Message-Id: <20170815011942.841397278@linuxfoundation.org>
Date:   Mon, 14 Aug 2017 18:19:02 -0700
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Boris Brezillon <boris.brezillon@...e-electrons.com>,
        Alexander Dahl <ada@...rsis.com>
Subject: [PATCH 4.12 11/65] mtd: nand: Declare tBERS, tR and tPROG as u64 to avoid integer overflow

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

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

From: Boris Brezillon <boris.brezillon@...e-electrons.com>

commit 6d29231000bbe0fb9e4893a9c68151ffdd3b5469 upstream.

All timings in nand_sdr_timings are expressed in picoseconds but some
of them may not fit in an u32.

Signed-off-by: Boris Brezillon <boris.brezillon@...e-electrons.com>
Fixes: 204e7ecd47e2 ("mtd: nand: Add a few more timings to nand_sdr_timings")
Reported-by: Alexander Dahl <ada@...rsis.com>
Reviewed-by: Alexander Dahl <ada@...rsis.com>
Tested-by: Alexander Dahl <ada@...rsis.com>
Signed-off-by: Boris Brezillon <boris.brezillon@...e-electrons.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/mtd/nand/nand_timings.c |    6 +++---
 include/linux/mtd/nand.h        |    6 +++---
 2 files changed, 6 insertions(+), 6 deletions(-)

--- a/drivers/mtd/nand/nand_timings.c
+++ b/drivers/mtd/nand/nand_timings.c
@@ -311,9 +311,9 @@ int onfi_init_data_interface(struct nand
 		struct nand_sdr_timings *timings = &iface->timings.sdr;
 
 		/* microseconds -> picoseconds */
-		timings->tPROG_max = 1000000UL * le16_to_cpu(params->t_prog);
-		timings->tBERS_max = 1000000UL * le16_to_cpu(params->t_bers);
-		timings->tR_max = 1000000UL * le16_to_cpu(params->t_r);
+		timings->tPROG_max = 1000000ULL * le16_to_cpu(params->t_prog);
+		timings->tBERS_max = 1000000ULL * le16_to_cpu(params->t_bers);
+		timings->tR_max = 1000000ULL * le16_to_cpu(params->t_r);
 
 		/* nanoseconds -> picoseconds */
 		timings->tCCS_min = 1000UL * le16_to_cpu(params->t_ccs);
--- a/include/linux/mtd/nand.h
+++ b/include/linux/mtd/nand.h
@@ -638,10 +638,10 @@ struct nand_buffers {
  * @tWW_min: WP# transition to WE# low
  */
 struct nand_sdr_timings {
-	u32 tBERS_max;
+	u64 tBERS_max;
 	u32 tCCS_min;
-	u32 tPROG_max;
-	u32 tR_max;
+	u64 tPROG_max;
+	u64 tR_max;
 	u32 tALH_min;
 	u32 tADL_min;
 	u32 tALS_min;