linux-kernel - [PATCH 4.9 152/191] xhci: Fix incorrect EP_STATE

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Message-Id: <20200629154007.2495120-153-sashal@kernel.org>
Date:   Mon, 29 Jun 2020 11:39:28 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Mathias Nyman <mathias.nyman@...ux.intel.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: [PATCH 4.9 152/191] xhci: Fix incorrect EP_STATE_MASK

From: Mathias Nyman <mathias.nyman@...ux.intel.com>

commit dceea67058fe22075db3aed62d5cb62092be5053 upstream.

EP_STATE_MASK should be 0x7 instead of 0xf

xhci spec 6.2.3 shows that the EP state field in the endpoint context data
structure consist of bits [2:0].
The old value included a bit from the next field which fortunately is a
 RsvdZ region. So hopefully this hasn't caused too much harm

Cc: stable@...r.kernel.org
Signed-off-by: Mathias Nyman <mathias.nyman@...ux.intel.com>
Link: https://lore.kernel.org/r/20200624135949.22611-2-mathias.nyman@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/usb/host/xhci.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h
index 2b603ef5c10cd..2b8df83dad38d 100644
--- a/drivers/usb/host/xhci.h
+++ b/drivers/usb/host/xhci.h
@@ -709,7 +709,7 @@ struct xhci_ep_ctx {
  * 4 - TRB error
  * 5-7 - reserved
  */
-#define EP_STATE_MASK		(0xf)
+#define EP_STATE_MASK		(0x7)
 #define EP_STATE_DISABLED	0
 #define EP_STATE_RUNNING	1
 #define EP_STATE_HALTED		2
-- 
2.25.1