1 files changed, 30 insertions, 0 deletions

diff --git a/arch/blackfin/kernel/traps.c b/arch/blackfin/kernel/traps.c
index 427294c47f1b..e4fd516ce482 100644
--- a/arch/blackfin/kernel/traps.c
+++ b/arch/blackfin/kernel/traps.c
@@ -524,6 +524,36 @@ asmlinkage notrace void trap_c(struct pt_regs *fp)
                         break;
                 /* External Memory Addressing Error */
                 case (SEQSTAT_HWERRCAUSE_EXTERN_ADDR):
+                        if (ANOMALY_05000310) {
+                                static unsigned long anomaly_rets;
+
+                                if ((fp->pc >= (L1_CODE_START + L1_CODE_LENGTH - 512)) &&
+                                    (fp->pc < (L1_CODE_START + L1_CODE_LENGTH))) {
+                                        /*
+                                         * A false hardware error will happen while fetching at
+                                         * the L1 instruction SRAM boundary.  Ignore it.
+                                         */
+                                        anomaly_rets = fp->rets;
+                                        goto traps_done;
+                                } else if (fp->rets == anomaly_rets) {
+                                        /*
+                                         * While boundary code returns to a function, at the ret
+                                         * point, a new false hardware error might occur too based
+                                         * on tests.  Ignore it too.
+                                         */
+                                        goto traps_done;
+                                } else if ((fp->rets >= (L1_CODE_START + L1_CODE_LENGTH - 512)) &&
+                                           (fp->rets < (L1_CODE_START + L1_CODE_LENGTH))) {
+                                        /*
+                                         * If boundary code calls a function, at the entry point,
+                                         * a new false hardware error maybe happen based on tests.
+                                         * Ignore it too.
+                                         */
+                                        goto traps_done;
+                                } else
+                                        anomaly_rets = 0;
+                        }
+
                         info.si_code = BUS_ADRERR;
                         sig = SIGBUS;
                         strerror = KERN_NOTICE HWC_x3(KERN_NOTICE);