mtd: nand: Declare tBERS, tR and tPROG as u64 to avoid integer overflow

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@free-electrons.com>
Fixes: 204e7ecd47e2 ("mtd: nand: Add a few more timings to nand_sdr_timings")
Reported-by: Alexander Dahl <ada@thorsis.com>
Cc: <stable@vger.kernel.org>
Reviewed-by: Alexander Dahl <ada@thorsis.com>
Tested-by: Alexander Dahl <ada@thorsis.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>

2 files changed, 6 insertions, 6 deletions

diff --git a/drivers/mtd/nand/nand_timings.c b/drivers/mtd/nand/nand_timings.c
index f06312df3669..7e36d7d13c26 100644
--- 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_chip *chip,
                 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);
diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h
index 892148c448cc..5216d2eb2289 100644
--- a/include/linux/mtd/nand.h
+++ b/include/linux/mtd/nand.h
@@ -681,10 +681,10 @@ 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;