From 8bc9f5d6085a3941c5a6c767efb96713d4e5c066 Mon Sep 17 00:00:00 2001 From: Sascha Hauer Date: Fri, 21 Sep 2018 10:40:43 +0200 Subject: mtd: mtdraw: do not write empty buffers When a page is completely 0xff then do not write it since users expect pages to be writable when they are empty. Signed-off-by: Sascha Hauer --- drivers/mtd/mtdraw.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'drivers/mtd/mtdraw.c') diff --git a/drivers/mtd/mtdraw.c b/drivers/mtd/mtdraw.c index 3ad9de80a2..bfae795bd7 100644 --- a/drivers/mtd/mtdraw.c +++ b/drivers/mtd/mtdraw.c @@ -165,6 +165,9 @@ static ssize_t mtdraw_blkwrite(struct mtd_info *mtd, const void *buf, struct mtd_oob_ops ops; int ret; + if (mtd_buf_all_ff(buf, mtd->writesize + mtd->oobsize)) + return 0; + ops.mode = MTD_OPS_RAW; ops.ooboffs = 0; ops.datbuf = (void *)buf; -- cgit v1.2.3