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spi: spidev_test: check error 

Check the result of sscanf to verify a result was found.
report and error and abort if pattern was not found.

Signed-off-by: Joshua Clayton <stillcompiling@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Joshua Clayton 2015-11-18 14:30:41 -08:00 committed by Mark Brown
parent 983b27886a
commit a20874f78b
1 changed files with 5 additions and 1 deletions
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6
tools/spi/spidev_test.c
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@ -86,13 +86,17 @@ static void hex_dump(const void *src, size_t length, size_t line_size, char *pre
static int unescape(char *_dst, char *_src, size_t len) static int unescape(char *_dst, char *_src, size_t len)
{ {
int ret = 0; int ret = 0;
int match;
char *src = _src; char *src = _src;
char *dst = _dst; char *dst = _dst;
unsigned int ch; unsigned int ch;
while (*src) { while (*src) {
if (*src == '\\' && *(src+1) == 'x') { if (*src == '\\' && *(src+1) == 'x') {
sscanf(src + 2, "%2x", &ch); match = sscanf(src + 2, "%2x", &ch);
if (!match)
pabort("malformed input string");
src += 4; src += 4;
*dst++ = (unsigned char)ch; *dst++ = (unsigned char)ch;
} else { } else {