Subject: [PATCH] powerpc: fix invalid pointer usage in ucc_slow_init()

From: Timur Tabi <[email-masked]>
Date: Thu, 15 Mar 2007 09:48:53 -0500

In two places, ucc_slow_init() passes a physical address instead of the
virtual address to functions that were expecting the latter, causing a kernel
panic.  us_info->regs contains the physical address of the UCC register set.
The registers are ioremap'd to kernel space, and the virtual pointers are
stored in us_regs.  The code was using us_info->regs when it should have been
using us_regs.

Signed-off-by: Timur Tabi <[email-masked]>
---
 arch/powerpc/sysdev/qe_lib/ucc_slow.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/powerpc/sysdev/qe_lib/ucc_slow.c b/arch/powerpc/sysdev/qe_lib/ucc_slow.c
index 817df73..b930d68 100644
--- a/arch/powerpc/sysdev/qe_lib/ucc_slow.c
+++ b/arch/powerpc/sysdev/qe_lib/ucc_slow.c
@@ -187,7 +187,7 @@ int ucc_slow_init(struct ucc_slow_info * us_info, struct ucc_slow_private ** ucc
 	uccs->us_pram = qe_muram_addr(uccs->us_pram_offset);
 
 	/* Init Guemr register */
-	if ((ret = ucc_init_guemr((struct ucc_common *) (us_info->regs)))) {
+	if ((ret = ucc_init_guemr((struct ucc_common *) us_regs))) {
 		printk(KERN_ERR "%s: cannot init GUEMR", __FUNCTION__);
 		ucc_slow_free(uccs);
 		return ret;
@@ -195,7 +195,7 @@ int ucc_slow_init(struct ucc_slow_info * us_info, struct ucc_slow_private ** ucc
 
 	/* Set UCC to slow type */
 	if ((ret = ucc_set_type(us_info->ucc_num,
-				(struct ucc_common *) (us_info->regs),
+				(struct ucc_common *) us_regs,
 				UCC_SPEED_TYPE_SLOW))) {
 		printk(KERN_ERR "%s: cannot set UCC type", __FUNCTION__);
 		ucc_slow_free(uccs);
-- 
1.5.0.2.260.g2eb065