47 lines
1.2 KiB
Diff
47 lines
1.2 KiB
Diff
From b5929f91416d64afacf46c649f38cc8f0eea50d2 Mon Sep 17 00:00:00 2001
|
|
From: Michal Suchanek <hramrach@gmail.com>
|
|
Date: Wed, 2 Dec 2015 10:38:20 +0000
|
|
Subject: [PATCH 096/113] mtd: spi-nor: add read loop
|
|
|
|
mtdblock and ubi do not handle the situation when read returns less data
|
|
than requested. Loop in spi-nor until buffer is filled or an error is
|
|
returned.
|
|
|
|
Signed-off-by: Michal Suchanek <hramrach@gmail.com>
|
|
Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@freescale.com>
|
|
---
|
|
drivers/mtd/spi-nor/spi-nor.c | 20 ++++++++++++++------
|
|
1 file changed, 14 insertions(+), 6 deletions(-)
|
|
|
|
--- a/drivers/mtd/spi-nor/spi-nor.c
|
|
+++ b/drivers/mtd/spi-nor/spi-nor.c
|
|
@@ -927,14 +927,22 @@ static int spi_nor_read(struct mtd_info
|
|
if (ret)
|
|
return ret;
|
|
|
|
- ret = nor->read(nor, from, len, buf);
|
|
+ while (len) {
|
|
+ ret = nor->read(nor, from, len, buf);
|
|
+ if (ret <= 0)
|
|
+ goto read_err;
|
|
|
|
- spi_nor_unlock_and_unprep(nor, SPI_NOR_OPS_READ);
|
|
- if (ret < 0)
|
|
- return ret;
|
|
+ WARN_ON(ret > len);
|
|
+ *retlen += ret;
|
|
+ buf += ret;
|
|
+ from += ret;
|
|
+ len -= ret;
|
|
+ }
|
|
+ ret = 0;
|
|
|
|
- *retlen += ret;
|
|
- return 0;
|
|
+read_err:
|
|
+ spi_nor_unlock_and_unprep(nor, SPI_NOR_OPS_READ);
|
|
+ return ret;
|
|
}
|
|
|
|
static int sst_write(struct mtd_info *mtd, loff_t to, size_t len,
|