mtd: spi-nor: spansion: make sure local struct does not contain garbage

Following errors were seen with um-x86_64-gcc12/um-allyesconfig:
+ /kisskb/src/drivers/mtd/spi-nor/spansion.c: error: 'op' is used uninitialized [-Werror=uninitialized]:  => 495:27, 364:27

Initialise local struct spi_mem_op with all zeros at declaration in
order to avoid using garbage data for fields that are not explicitly
set afterwards.

Reported-by: Geert Uytterhoeven <geert@linux-m68k.org>
Fixes: c87c9b11c53ce ("mtd: spi-nor: spansion: Determine current address mode")
Fixes: 6afcc84080c41 ("mtd: spi-nor: spansion: Add support for Infineon S25FS256T")
Signed-off-by: Tudor Ambarus <tudor.ambarus@linaro.org>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20230509193900.948753-1-tudor.ambarus@linaro.org

diff --git a/drivers/mtd/spi-nor/spansion.c b/drivers/mtd/spi-nor/spansion.c
index 15f9a80c10b9bd58096d95214b921dee5c72f48f..36876aa849ede7cda8d9900589fccbcb879c6d93 100644 (file)
--- a/drivers/mtd/spi-nor/spansion.c
+++ b/drivers/mtd/spi-nor/spansion.c
@@ -361,7 +361,7 @@ static int cypress_nor_determine_addr_mode_by_sr1(struct spi_nor *nor,
  */
 static int cypress_nor_set_addr_mode_nbytes(struct spi_nor *nor)
 {
-       struct spi_mem_op op;
+       struct spi_mem_op op = {};
        u8 addr_mode;
        int ret;
 
@@ -492,7 +492,7 @@ s25fs256t_post_bfpt_fixup(struct spi_nor *nor,
                          const struct sfdp_parameter_header *bfpt_header,
                          const struct sfdp_bfpt *bfpt)
 {
-       struct spi_mem_op op;
+       struct spi_mem_op op = {};
        int ret;
 
        ret = cypress_nor_set_addr_mode_nbytes(nor);