mtd: spi-nor: fix silent truncation in spi_nor_read()

commit a719a75a7761e4139dd099330d9fe3589d844f9b upstream.

spi_nor_read() assigns the result of 'ssize_t spi_nor_read_data()'
to the 'int ret' variable, while 'ssize_t' is a 64-bit type and *int*
is a 32-bit type on the 64-bit machines. This silent truncation isn't
really valid, so fix up the variable's type.

Fixes: 59451e1233bd ("mtd: spi-nor: change return value of read/write")
Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/mtd/spi-nor/spi-nor.c b/drivers/mtd/spi-nor/spi-nor.c
index 2e18342..d1c91f0 100644 (file)
--- a/drivers/mtd/spi-nor/spi-nor.c
+++ b/drivers/mtd/spi-nor/spi-nor.c
@@ -1294,7 +1294,7 @@ static int spi_nor_read(struct mtd_info *mtd, loff_t from, size_t len,
                        size_t *retlen, u_char *buf)
 {
        struct spi_nor *nor = mtd_to_spi_nor(mtd);
-       int ret;
+       ssize_t ret;
 
        dev_dbg(nor->dev, "from 0x%08x, len %zd\n", (u32)from, len);