[PATCH] [RFC] USB: hub.c: decrease the number of attempts of enumeration scheme

[Yasushi Asano <yazzep@gmail.com>]

From: Yasushi Asano <yasano@jp.adit-jv.com>

According to 6.7.22 A-UUT “Device No Response” for connection timeout
of USB OTG and EH automated compliance plan v1.2, the enumeration
failure has to be detected within 30 seconds. However, the old and new
enumeration schemes made a total of 16 attempts, and each attempt can
take 5 seconds to timeout, so it failed with PET test. Modify it to
reduce the number of attempts to 5 and pass PET test.

Signed-off-by: Yasushi Asano <yasano@jp.adit-jv.com>
---
 drivers/usb/core/hub.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c
index 052d5ac..ebf6931 100644
--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -2707,9 +2707,9 @@ static unsigned hub_is_wusb(struct usb_hub *hub)
 
 #define PORT_RESET_TRIES	5
 #define SET_ADDRESS_TRIES	2
-#define GET_DESCRIPTOR_TRIES	2
-#define SET_CONFIG_TRIES	(2 * (use_both_schemes + 1))
-#define USE_NEW_SCHEME(i, scheme)	((i) / 2 == (int)(scheme))
+#define GET_DESCRIPTOR_TRIES	1
+#define SET_CONFIG_TRIES	(use_both_schemes + 1)
+#define USE_NEW_SCHEME(i, scheme)	((i) == (int)(scheme))
 
 #define HUB_ROOT_RESET_TIME	60	/* times are in msec */
 #define HUB_SHORT_RESET_TIME	10
-- 
2.7.4