target: catch dap_lookup read error

Issue found by clang-3.1

Change-Id: I2e922ec83117e75db5bec1e82edaa75a9e6e7464
Signed-off-by: Spencer Oliver <spen@spen-soft.co.uk>
Reviewed-on: http://openocd.zylin.com/778
Tested-by: jenkins
Reviewed-by: Freddie Chopin <freddie.chopin@gmail.com>

diff --git a/src/target/arm_adi_v5.c b/src/target/arm_adi_v5.c
index fd3a92ce3f45c0a3946bff69dfc3241eb16b8e0f..eed84ce957d6407960a5e26bdc8c8574ac8d8f81 100644 (file)
--- a/src/target/arm_adi_v5.c
+++ b/src/target/arm_adi_v5.c
@@ -1265,6 +1265,8 @@ int dap_lookup_cs_component(struct adiv5_dap *dap, int ap,
                        retval = mem_ap_read_atomic_u32(dap,
                                        (component_base & 0xfffff000) | 0xfcc,
                                        &devtype);
+                       if (retval != ERROR_OK)
+                               return retval;
                        if ((devtype & 0xff) == type) {
                                *addr = component_base;
                                retval = ERROR_OK;