Static checker warns 'ret' variable may be used uninitialized in spi_nor_erase() and spi_nor_write() in case of zero length requests. Fix these warnings by checking for zero length requests and returning early.

Reported-by: Dan Murphy dmurphy@ti.com Signed-off-by: Vignesh Raghavendra vigneshr@ti.com --- drivers/mtd/spi/spi-nor-core.c | 6 ++++++ 1 file changed, 6 insertions(+)

diff --git a/drivers/mtd/spi/spi-nor-core.c b/drivers/mtd/spi/spi-nor-core.c index 9b726be5d22d..87bcb63347ce 100644 --- a/drivers/mtd/spi/spi-nor-core.c +++ b/drivers/mtd/spi/spi-nor-core.c @@ -550,6 +550,9 @@ static int spi_nor_erase(struct mtd_info *mtd, struct erase_info *instr) dev_dbg(nor->dev, "at 0x%llx, len %lld\n", (long long)instr->addr, (long long)instr->len);

+ if (!instr->len) + return 0; + div_u64_rem(instr->len, mtd->erasesize, &rem); if (rem) return -EINVAL; @@ -1230,6 +1233,9 @@ static int spi_nor_write(struct mtd_info *mtd, loff_t to, size_t len,

dev_dbg(nor->dev, "to 0x%08x, len %zd\n", (u32)to, len);

+ if (!len) + return 0; + for (i = 0; i < len; ) { ssize_t written; loff_t addr = to + i;