target/cortex_m: fix clang static analyzer warning

[openocd.git] / src / target / oocd_trace.c

diff --git a/src/target/oocd_trace.c b/src/target/oocd_trace.c
index 2969cc1e112e92fefa2258a20f1efa1e92c3f81c..627366d5d409413671e719ff0ee1a406574adb10 100644 (file)
--- a/src/target/oocd_trace.c
+++ b/src/target/oocd_trace.c
@@ -13,9 +13,7 @@
  *   GNU General Public License for more details.                          *
  *                                                                         *
  *   You should have received a copy of the GNU General Public License     *
- *   along with this program; if not, write to the                         *
- *   Free Software Foundation, Inc.,                                       *
- *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.           *
+ *   along with this program.  If not, see <http://www.gnu.org/licenses/>. *
  ***************************************************************************/
 
 #ifdef HAVE_CONFIG_H
@@ -38,6 +36,8 @@ static int oocd_trace_read_reg(struct oocd_trace *oocd_trace, int reg, uint32_t
 
        cmd = 0x10 | (reg & 0x7);
        bytes_written = write(oocd_trace->tty_fd, &cmd, 1);
+       if (bytes_written < 1)
+               return ERROR_FAIL;
 
        bytes_to_read = 4;
        while (bytes_to_read > 0) {
@@ -62,6 +62,9 @@ static int oocd_trace_write_reg(struct oocd_trace *oocd_trace, int reg, uint32_t
        data[4] = (value & 0xff000000) >> 24;
 
        bytes_written = write(oocd_trace->tty_fd, data, 5);
+       if (bytes_written < 5)
+               return ERROR_FAIL;
+
        LOG_DEBUG("reg #%i: 0x%8.8x", reg, value);
 
        return ERROR_OK;
@@ -78,6 +81,8 @@ static int oocd_trace_read_memory(struct oocd_trace *oocd_trace, uint8_t *data,
 
        cmd = 0x20;
        bytes_written = write(oocd_trace->tty_fd, &cmd, 1);
+       if (bytes_written < 1)
+               return ERROR_FAIL;
 
        bytes_to_read = size * 16;
        while (bytes_to_read > 0) {
@@ -358,6 +363,8 @@ COMMAND_HANDLER(handle_oocd_trace_resync_command)
        cmd_array[0] = 0xf0;
 
        bytes_written = write(oocd_trace->tty_fd, cmd_array, 1);
+       if (bytes_written < 1)
+               return ERROR_FAIL;
 
        command_print(CMD_CTX, "requesting traceclock resync");
        LOG_DEBUG("resyncing traceclk pll");