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>

diff --git a/drivers/mtd/nand/nand_timings.c b/drivers/mtd/nand/nand_timings.c
index f06312df3669c18cb788fc033acf6b5811db8d0a..7e36d7d13c268fc2317c330f7688e188e81d6bdc 100644 (file)
--- 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 892148c448cce2c9c9e9e59b2d44941283635cbd..5216d2eb22891010187b86a5911a10b17aedf273 100644 (file)
--- 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;