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sysfsgpio: remove ignoring return value build warning 

fixes following gcc warning:
error: ignoring return value of write, declared with attribute warn_unused_result

Change-Id: I96ea6649078449208a77690caea2cb237c388e6e
Signed-off-by: Spencer Oliver <spen@spen-soft.co.uk>
Reviewed-on: http://openocd.zylin.com/854
Tested-by: jenkins
Reviewed-by: Marc Reilly <marc@cpdesign.com.au>
Reviewed-by: Freddie Chopin <freddie.chopin@gmail.com>
This commit is contained in:
Spencer Oliver 2012-09-27 11:06:43 +01:00 committed by Freddie Chopin
parent 46c1114c1e
commit c06af3af91
1 changed files with 29 additions and 10 deletions
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39
src/jtag/drivers/sysfsgpio.c
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@ -199,6 +199,7 @@ static void sysfsgpio_write(int tck, int tms, int tdi)
static int last_tdi;
static int first_time;
size_t bytes_written;
if (!first_time) {
last_tck = !tck;
@ -207,13 +208,24 @@ static void sysfsgpio_write(int tck, int tms, int tdi)
first_time = 1;
}
if (tdi != last_tdi)
write(tdi_fd, tdi ? &one : &zero, 1);
if (tms != last_tms)
write(tms_fd, tms ? &one : &zero, 1);
if (tdi != last_tdi) {
bytes_written = write(tdi_fd, tdi ? &one : &zero, 1);
if (bytes_written != 1)
LOG_WARNING("writing tdi failed");
}
if (tms != last_tms) {
bytes_written = write(tms_fd, tms ? &one : &zero, 1);
if (bytes_written != 1)
LOG_WARNING("writing tms failed");
}
/* write clk last */
if (tck != last_tck)
write(tck_fd, tck ? &one : &zero, 1);
if (tck != last_tck) {
bytes_written = write(tck_fd, tck ? &one : &zero, 1);
if (bytes_written != 1)
LOG_WARNING("writing tck failed");
}
last_tdi = tdi;
last_tms = tms;
@ -229,14 +241,21 @@ static void sysfsgpio_reset(int trst, int srst)
{
const char one[] = "1";
const char zero[] = "0";
size_t bytes_written;
/* assume active low */
if (srst_fd >= 0)
write(srst_fd, srst ? &zero : &one, 1);
if (srst_fd >= 0) {
bytes_written = write(srst_fd, srst ? &zero : &one, 1);
if (bytes_written != 1)
LOG_WARNING("writing srst failed");
}
/* assume active low */
if (trst_fd >= 0)
write(trst_fd, trst ? &zero : &one, 1);
if (trst_fd >= 0) {
bytes_written = write(trst_fd, trst ? &zero : &one, 1);
if (bytes_written != 1)
LOG_WARNING("writing trst failed");
}
}
/* No speed control is implemented yet */