Blackfin: add workaround for anomaly 05000461

Returning too fast with a bad RETI can trigger false errors. Signed-off-by: Robin Getz <robin.getz@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
git-mirror · Jun 12, 2009 · 0acad8d · 0acad8d
1 parent a0cab65
commit 0acad8d
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/arch/blackfin/kernel/traps.c b/arch/blackfin/kernel/traps.c
@@ -594,6 +594,9 @@ asmlinkage void trap_c(struct pt_regs *fp)
 		force_sig_info(sig, &info, current);
 	}
 
+	if (ANOMALY_05000461 && trapnr == VEC_HWERR && !access_ok(VERIFY_READ, fp->pc, 8))
+		fp->pc = SAFE_USER_INSTRUCTION;
+
 	trace_buffer_restore(j);
 	return;
 }