target/linux/generic/pending-5.4/450-mtd-spi-nor-allow-NOR-driver-to-write-fewer-bytes-th.patch

   1 From: Felix Fietkau <nbd@nbd.name>
   2 Date: Thu, 22 Feb 2018 11:11:57 +0100
   3 Subject: [PATCH] mtd: spi-nor: allow NOR driver to write fewer bytes than
   4  requested
   5
   6 The write size can be constrained by the maximum message/transfer size
   7 of the SPI controller. Only check for ret = 0 to avoid an infinite loop.
   8
   9 Signed-off-by: Felix Fietkau <nbd@nbd.name>
  10 ---
  11
  12 --- a/drivers/mtd/spi-nor/spi-nor.c
  13 +++ b/drivers/mtd/spi-nor/spi-nor.c
  14 @@ -2704,7 +2704,7 @@ static int spi_nor_write(struct mtd_info
  15
  16                 write_enable(nor);
  17                 ret = spi_nor_write_data(nor, addr, page_remain, buf + i);
  18 -               if (ret < 0)
  19 +               if (ret <= 0)
  20                         goto write_err;
  21                 written = ret;
  22