target/linux/generic/backport-4.9/062-v4.11-0003-mtd-spi-nor-remove-WARN_ONCE-message-in-spi_nor_writ.patch

   1 From dc176595bf184e89bf28fdf91cbc1d050dfe63b3 Mon Sep 17 00:00:00 2001
   2 From: Cyrille Pitchen <cyrille.pitchen@atmel.com>
   3 Date: Tue, 6 Dec 2016 18:14:24 +0100
   4 Subject: [PATCH] mtd: spi-nor: remove WARN_ONCE() message in spi_nor_write()
   5
   6 This patch removes the WARN_ONCE() test in spi_nor_write().
   7 This macro triggers the display of a warning message almost every time we
   8 use a UBI file-system because a write operation is performed at offset 64,
   9 which is in the middle of the SPI NOR memory page. This is a valid
  10 operation for ubifs.
  11
  12 Hence this warning is pretty annoying and useless so we just remove it.
  13
  14 Signed-off-by: Cyrille Pitchen <cyrille.pitchen@atmel.com>
  15 Suggested-by: Richard Weinberger <richard@nod.at>
  16 Suggested-by: Andras Szemzo <szemzo.andras@gmail.com>
  17 Acked-by: Boris Brezillon <boris.brezillon@free-electrons.com>
  18 ---
  19  drivers/mtd/spi-nor/spi-nor.c | 3 ---
  20  1 file changed, 3 deletions(-)
  21
  22 --- a/drivers/mtd/spi-nor/spi-nor.c
  23 +++ b/drivers/mtd/spi-nor/spi-nor.c
  24 @@ -1269,9 +1269,6 @@ static int spi_nor_write(struct mtd_info
  25
  26                         page_offset = do_div(aux, nor->page_size);
  27                 }
  28 -               WARN_ONCE(page_offset,
  29 -                         "Writing at offset %zu into a NOR page. Writing partial pages may decrease reliability and increase wear of NOR flash.",
  30 -                         page_offset);
  31                 /* the size of data remaining on the first page */
  32                 page_remain = min_t(size_t,
  33                                     nor->page_size - page_offset, len - i);