linux-kernel - [PATCH 08/62] Blackfin: fix bug found by traps test case 21

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Date:	Fri,  5 Jun 2009 04:04:17 -0400
From:	Mike Frysinger <vapier@...too.org>
To:	linux-kernel@...r.kernel.org
Cc:	uclinux-dist-devel@...ckfin.uclinux.org,
	Graf Yang <graf.yang@...log.com>,
	Bryan Wu <cooloney@...nel.org>
Subject: [PATCH 08/62] Blackfin: fix bug found by traps test case 21

From: Graf Yang <graf.yang@...log.com>

The traps test case 21 "exception 0x3f: l1_instruction_access" would make
the kernel panic on BF533's because we end up calling show_stack()
infinitely.

Signed-off-by: Graf Yang <graf.yang@...log.com>
Signed-off-by: Mike Frysinger <vapier@...too.org>
Signed-off-by: Bryan Wu <cooloney@...nel.org>
---
 arch/blackfin/mm/isram-driver.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/arch/blackfin/mm/isram-driver.c b/arch/blackfin/mm/isram-driver.c
index 22913e7..c080e70 100644
--- a/arch/blackfin/mm/isram-driver.c
+++ b/arch/blackfin/mm/isram-driver.c
@@ -125,7 +125,7 @@ static bool isram_check_addr(const void *addr, size_t n)
 {
 	if ((addr >= (void *)L1_CODE_START) &&
 	    (addr < (void *)(L1_CODE_START + L1_CODE_LENGTH))) {
-		if ((addr + n) >= (void *)(L1_CODE_START + L1_CODE_LENGTH)) {
+		if ((addr + n) > (void *)(L1_CODE_START + L1_CODE_LENGTH)) {
 			show_stack(NULL, NULL);
 			printk(KERN_ERR "isram_memcpy: copy involving %p length "
 					"(%zu) too long\n", addr, n);
-- 
1.6.3.1

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