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From: Felix Fietkau <nbd@nbd.name>
Date: Thu, 22 Feb 2018 11:11:57 +0100
Subject: [PATCH] mtd: spi-nor: allow NOR driver to write fewer bytes than
requested
The write size can be constrained by the maximum message/transfer size
of the SPI controller. Only check for ret = 0 to avoid an infinite loop.
Signed-off-by: Felix Fietkau <nbd@nbd.name>
---
--- a/drivers/mtd/spi-nor/spi-nor.c
+++ b/drivers/mtd/spi-nor/spi-nor.c
@@ -1371,7 +1371,7 @@ static int spi_nor_write(struct mtd_info
write_enable(nor);
ret = nor->write(nor, addr, page_remain, buf + i);
- if (ret < 0)
+ if (ret <= 0)
goto write_err;
written = ret;
@@ -1380,13 +1380,6 @@ static int spi_nor_write(struct mtd_info
goto write_err;
*retlen += written;
i += written;
- if (written != page_remain) {
- dev_err(nor->dev,
- "While writing %zu bytes written %zd bytes\n",
- page_remain, written);
- ret = -EIO;
- goto write_err;
- }
}
write_err:
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