From: Sascha Hauer <s.hauer@pengutronix.de>
To: Barebox List <barebox@lists.infradead.org>
Subject: [PATCH 3/8] mtd: mtdraw: do not write empty buffers
Date: Fri, 21 Sep 2018 13:18:15 +0200 [thread overview]
Message-ID: <20180921111820.29742-4-s.hauer@pengutronix.de> (raw)
In-Reply-To: <20180921111820.29742-1-s.hauer@pengutronix.de>
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 <s.hauer@pengutronix.de>
---
drivers/mtd/mtdraw.c | 3 +++
1 file changed, 3 insertions(+)
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;
--
2.19.0
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next prev parent reply other threads:[~2018-09-21 11:18 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-09-21 11:18 [PATCH 0/8] mtd: work on mtdraw Sascha Hauer
2018-09-21 11:18 ` [PATCH 1/8] mtd: mtdraw: Simplify error path Sascha Hauer
2018-09-21 11:18 ` [PATCH 2/8] mtd: mtdraw: use dev_* for printing Sascha Hauer
2018-09-21 14:33 ` Sam Ravnborg
2018-09-24 6:51 ` Sascha Hauer
2018-09-21 11:18 ` Sascha Hauer [this message]
2018-09-21 11:18 ` [PATCH 4/8] mtd: mtdraw: pass mtdraw around Sascha Hauer
2018-09-21 11:18 ` [PATCH 5/8] mtd: mtdraw: add raw page size to private data Sascha Hauer
2018-09-21 14:42 ` Sam Ravnborg
2018-09-24 6:52 ` Sascha Hauer
2018-09-21 11:18 ` [PATCH 6/8] mtd: mtdraw: fail when writing fails Sascha Hauer
2018-09-21 11:18 ` [PATCH 7/8] mtd: mtdraw: replace "block" with "page" Sascha Hauer
2018-09-21 11:18 ` [PATCH 8/8] mtd: mtdraw: fix wrong alignment check Sascha Hauer
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