Messages in this thread Patch in this message | | | From | Daniel Walter <> | Subject | [PATCH 10/46] mtd: nandsim: Add helper functions for pointer magic | Date | Wed, 31 Aug 2016 09:28:17 +0200 |
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From: Richard Weinberger <richard@nod.at>
Signed-off-by: Richard Weinberger <richard@nod.at> --- drivers/mtd/nand/nandsim.c | 17 ++++++++++++++--- 1 file changed, 14 insertions(+), 3 deletions(-)
diff --git a/drivers/mtd/nand/nandsim.c b/drivers/mtd/nand/nandsim.c index fda670b..f26e983 100644 --- a/drivers/mtd/nand/nandsim.c +++ b/drivers/mtd/nand/nandsim.c @@ -461,6 +461,18 @@ struct grave_page { /* MTD structure for NAND controller */ static struct mtd_info *ns_mtds[NS_MAX_DEVICES]; +static inline struct nandsim *chip_to_ns(struct nand_chip *chip) +{ + return (struct nandsim *)(chip + 1); +} + +static inline struct mtd_info *ns_to_mtd(struct nandsim *ns) +{ + struct nand_chip *chip = ((struct nand_chip *)ns - 1); + + return nand_to_mtd(chip); +} + static int nandsim_debugfs_show(struct seq_file *m, void *private) { struct nandsim *ns = (struct nandsim *)m->private; @@ -1462,8 +1474,7 @@ static int do_read_error(struct nandsim *ns, int num) static void do_bit_flips(struct nandsim *ns, int num) { - struct nand_chip *chip = ((struct nand_chip *)ns - 1); - struct mtd_info *nsmtd = nand_to_mtd(chip); + struct mtd_info *nsmtd = ns_to_mtd(ns); if (ns->bitflips && prandom_u32() < (1 << 22)) { int flips = 1; @@ -2300,7 +2311,7 @@ static int __init ns_init_default(void) WARN_ON(ns_mtds[0]); nsmtd = ns_mtds[0] = nand_to_mtd(chip); - nand = (struct nandsim *)(chip + 1); + nand = chip_to_ns(chip); nand_set_controller_data(chip, (void *)nand); INIT_LIST_HEAD(&nand->weak_blocks); -- 2.8.3
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