From: Jack Pham <jackp@codeaurora.org>
Date: Mon, 10 Dec 2012 22:28:13 +0000 (-0800)
Subject: UPSTREAM: usb: dwc3: debugfs: fix regdump offset
X-Git-Url: http://git.cascardo.eti.br/?p=cascardo%2Flinux.git;a=commitdiff_plain;h=db04aad0d3b3d103ec3b5b7c850c90755ecce42d

UPSTREAM: usb: dwc3: debugfs: fix regdump offset

As with dwc_readl/writel, the global registers are specified as
offsets starting from the beginning of the xHCI address space,
but the memory region pointed to by dwc->regs already maps to
the start of the global addresses. Fix by offsetting each of the
regs relative to DWC3_GLOBALS_REGS_START.

Signed-off-by: Jack Pham <jackp@codeaurora.org>
Signed-off-by: Felipe Balbi <balbi@ti.com>
(cherry picked from commit 1604c1e760119ab3fe9f71679ebaeb058d3d8ae1)
Cherry pick from Linus' tree, applied cleanly

BUG=chromium:229725
TEST='cat /sys/kernel/debug/dwc3.0/regdump' should not crash on Snow.

Change-Id: Ic58153b9c3f4135355094a5dc49ad0fabb2fcd25
Signed-off-by: Julius Werner <jwerner@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/48554
Reviewed-by: Vincent Palatin <vpalatin@chromium.org>
---

diff --git a/drivers/usb/dwc3/debugfs.c b/drivers/usb/dwc3/debugfs.c
index 553bbaa227ac..34dc342ea93a 100644
--- a/drivers/usb/dwc3/debugfs.c
+++ b/drivers/usb/dwc3/debugfs.c
@@ -56,7 +56,7 @@
 #define dump_register(nm)				\
 {							\
 	.name	= __stringify(nm),			\
-	.offset	= DWC3_ ##nm,				\
+	.offset	= DWC3_ ##nm - DWC3_GLOBALS_REGS_START,	\
 }
 
 static const struct debugfs_reg32 dwc3_regs[] = {