drivers/bitbang: silence scan-build warning

The array is partially initialized with buf_set_u32(,5,32,), then
the rest of the array is read from SWD.
But scan-build report the array to have garbage content after the
initialization, due to the offset of 5 bit that only inits part of
the first byte.

Silence the false positive from scan-build by initializing the
array.

Change-Id: Ic38d50280f67939e3ec5fa05741f66d5f993f8c2
Signed-off-by: Antonio Borneo <borneo.antonio@gmail.com>
Reviewed-on: https://review.openocd.org/c/openocd/+/7013
Tested-by: jenkins
Reviewed-by: Tomas Vanek <vanekt@fbl.cz>

diff --git a/src/jtag/drivers/bitbang.c b/src/jtag/drivers/bitbang.c
index 898d6d3df9c5d482d167348d8f6b8a8e45416023..78dcb2947d415e0e08f2f9df91ce5f67ffa978a4 100644 (file)
--- a/src/jtag/drivers/bitbang.c
+++ b/src/jtag/drivers/bitbang.c
@@ -532,8 +532,9 @@ static void bitbang_swd_write_reg(uint8_t cmd, uint32_t value, uint32_t ap_delay
        /* Devices do not reply to DP_TARGETSEL write cmd, ignore received ack */
        bool check_ack = swd_cmd_returns_ack(cmd);
 
+       /* init the array to silence scan-build */
+       uint8_t trn_ack_data_parity_trn[DIV_ROUND_UP(4 + 3 + 32 + 1 + 4, 8)] = {0};
        for (;;) {
-               uint8_t trn_ack_data_parity_trn[DIV_ROUND_UP(4 + 3 + 32 + 1 + 4, 8)];
                buf_set_u32(trn_ack_data_parity_trn, 1 + 3 + 1, 32, value);
                buf_set_u32(trn_ack_data_parity_trn, 1 + 3 + 1 + 32, 1, parity_u32(value));