Gitweb: http://git.kernel.org/linus/0acad8dfee6bde7e246a95a52f864a8eee777ed8
Commit: 0acad8dfee6bde7e246a95a52f864a8eee777ed8
Parent: a0cab65642813b7990e1b4b2ab6ad92e171571f4
Author: Robin Getz <robin.getz@analog.com>
AuthorDate: Mon May 11 18:55:16 2009 +0000
Committer: Mike Frysinger <vapier@gentoo.org>
CommitDate: Fri Jun 12 06:11:46 2009 -0400
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>
---
arch/blackfin/kernel/traps.c | 3 +++
1 files changed, 3 insertions(+), 0 deletions(-)
diff --git a/arch/blackfin/kernel/traps.c b/arch/blackfin/kernel/traps.c
index 0d04a47..778a756 100644
--- 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;
}
--
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