From 2d1155478fb6f972b3a97cbf13151ee4f078a164 Mon Sep 17 00:00:00 2001
From: Matthijs Kooijman <matthijs@stdin.nl>
Date: Thu, 3 Oct 2013 09:46:25 +0200
Subject: [PATCH] staging: dwc2: Make dwc2_hw_params.host_channels large enough
The hardware offers a 4-bit register containing the number of host
channels. However, the values of these register mean 1-16 host channels,
not 0-15. Since the dwc2_hw_params struct stores the actual number of
host channels supported instead of the raw register value, it should be
5 bits wide instead of 4.
Before this commit, hardware with 16 host channels would overflow the
field, making it appear as 0 channels.
This bug was introduced in commit 9badec2 (staging: dwc2: interpret all
hwcfg and related register at init time).
Reported-by: Dinh Nguyen <dinguyen@altera.com>
Signed-off-by: Matthijs Kooijman <matthijs@stdin.nl>
Acked-by: Paul Zimmerman <paulz@synopsys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/staging/dwc2/core.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/staging/dwc2/core.h b/drivers/staging/dwc2/core.h
index f7ba34b7071c..fab718d9b326 100644
--- a/drivers/staging/dwc2/core.h
+++ b/drivers/staging/dwc2/core.h
@@ -294,7 +294,7 @@ struct dwc2_hw_params {
unsigned dev_token_q_depth:5;
unsigned max_transfer_size:26;
unsigned max_packet_count:11;
- unsigned host_channels:4;
+ unsigned host_channels:5;
unsigned hs_phy_type:2;
unsigned fs_phy_type:2;
unsigned i2c_enable:1;
--
2.34.1