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mtd: spi-nor: Support controllers with limited TX FIFO size

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Some SPI controllers can't write nor->page_size bytes in a single
step because their TX FIFO is too small.

Allow nor->write() to return a size that is smaller than the requested
write size to gracefully handle this case.

Signed-off-by: Yogesh Gaur <yogeshnarayan.gaur@nxp.com>
Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
This commit is contained in:
Yogesh Gaur 2018-06-13 11:38:12 +05:30 committed by Boris Brezillon
parent 900f5e0d8c
commit 630d6bd8a3
1 changed files with 0 additions and 7 deletions
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7
drivers/mtd/spi-nor/spi-nor.c
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@ -1756,13 +1756,6 @@ static int spi_nor_write(struct mtd_info *mtd, loff_t to, size_t len,
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: