spi: fix counting in spi-loopback-test code

These variables are always used uninitialized:

drivers/spi/spi-loopback-test.c: In function 'spi_test_run_iter':
drivers/spi/spi-loopback-test.c:768:17: warning: 'rx_count' may be used uninitialized in this function [-Wmaybe-uninitialized]
drivers/spi/spi-loopback-test.c:762:17: warning: 'tx_count' may be used uninitialized in this function [-Wmaybe-uninitialized]

Adding an explicit initialization seems to be the only
workable solution here, to make the code behave correctly
and build without warning.

Fixes: 84e0c4e5e2c4 ("spi: add loopback test driver to allow for spi_master regression tests")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/drivers/spi/spi-loopback-test.c b/drivers/spi/spi-loopback-test.c
index 894616f687b0f314168bc17e77d14b7e477a4ec8..cf4bb36bee25c9bdf8ad39a570ceb61fda3a7421 100644 (file)
--- a/drivers/spi/spi-loopback-test.c
+++ b/drivers/spi/spi-loopback-test.c
@@ -761,6 +761,7 @@ static int spi_test_run_iter(struct spi_device *spi,
                test.iterate_transfer_mask = 1;
 
        /* count number of transfers with tx/rx_buf != NULL */
+       rx_count = tx_count = 0;
        for (i = 0; i < test.transfer_count; i++) {
                if (test.transfers[i].tx_buf)
                        tx_count++;