target/arm_dpm: add missing error returns

Discoverd by clang static analyzer.

Change-Id: I93d5de0a36216e62b170fe8cc870431226a7777f
Signed-off-by: Tomas Vanek <vanekt@fbl.cz>
Reviewed-on: http://openocd.zylin.com/5377
Tested-by: jenkins
Reviewed-by: Oleksij Rempel <linux@rempel-privat.de>

diff --git a/src/target/arm_dpm.c b/src/target/arm_dpm.c
index 8b99570334e259ce645962c5eeb709e9d9d7b656..f5dd22d8b31677a57f8c8bb414e501c65e918443 100644 (file)
--- a/src/target/arm_dpm.c
+++ b/src/target/arm_dpm.c
@@ -145,6 +145,9 @@ static int dpm_read_reg_u64(struct arm_dpm *dpm, struct reg *r, unsigned regnum)
                        retval = dpm->instr_read_data_r0(dpm,
                                ARMV4_5_VMOV(1, 1, 0, ((regnum - ARM_VFP_V3_D0) >> 4),
                                ((regnum - ARM_VFP_V3_D0) & 0xf)), &value_r0);
+                       if (retval != ERROR_OK)
+                               break;
+
                        /* read r1 via dcc */
                        retval = dpm->instr_read_data_dcc(dpm,
                                ARMV4_5_MCR(14, 0, 1, 0, 5, 0),
@@ -248,6 +251,9 @@ static int dpm_write_reg_u64(struct arm_dpm *dpm, struct reg *r, unsigned regnum
                        retval = dpm->instr_write_data_dcc(dpm,
                                ARMV4_5_MRC(14, 0, 1, 0, 5, 0),
                                value_r1);
+                       if (retval != ERROR_OK)
+                               break;
+
                        /* write value_r0 to r0 via dcc then,
                         * move to double word register from r0:r1: "vmov vm, r0, r1"
                         */