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 <dinh.linux@xxxxxxxxx>
Signed-off-by: Matthijs Kooijman <matthijs@xxxxxxxx>
---
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 f7ba34b..fab718d 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;
--
1.8.4.rc1
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