From ebea7c0545d4d5e554b84c3ee8072f13c3fdd2ba Mon Sep 17 00:00:00 2001
From: Arnd Bergmann <arnd@arndb.de>
Date: Wed, 13 Jan 2016 21:51:29 +0100
Subject: [PATCH] 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>
---
drivers/spi/spi-loopback-test.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/spi/spi-loopback-test.c b/drivers/spi/spi-loopback-test.c
index 894616f687b0f..cf4bb36bee25c 100644
--- 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++;