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[15/28] usb: gadget: function: f_obex: fix Interface Descriptor Test

Message ID 1413565804-13061-16-git-send-email-balbi@ti.com
State Accepted
Commit 3985f3ab0834edf014ebd19192d9dd77422dea67
Headers show

Commit Message

Felipe Balbi Oct. 17, 2014, 5:09 p.m. UTC 
On USB20CV's Interface Descriptor Test, a series
of SetInterface/GetInterface requests are issued
and gadget driver is required to always return
correct alternate setting.

In one step of the test, g_serial with f_obex
was returning the wrong value (1 instead of 0).

In order to fix this, we will now hold currently
selected alternate setting inside our struct f_obex
and just return that from our ->get_alt()
implementation.

Note that his also simplifies the code a bit.

Signed-off-by: Felipe Balbi <balbi@ti.com>
---
 drivers/usb/gadget/function/f_obex.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)
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Patch

diff --git a/drivers/usb/gadget/function/f_obex.c b/drivers/usb/gadget/function/f_obex.c
index 5f40080..1a1a490 100644
--- a/drivers/usb/gadget/function/f_obex.c
+++ b/drivers/usb/gadget/function/f_obex.c
@@ -35,6 +35,7 @@  struct f_obex {
 	struct gserial			port;
 	u8				ctrl_id;
 	u8				data_id;
+	u8				cur_alt;
 	u8				port_num;
 	u8				can_activate;
 };
@@ -235,6 +236,8 @@  static int obex_set_alt(struct usb_function *f, unsigned intf, unsigned alt)
 	} else
 		goto fail;
 
+	obex->cur_alt = alt;
+
 	return 0;
 
 fail:
@@ -245,10 +248,7 @@  static int obex_get_alt(struct usb_function *f, unsigned intf)
 {
 	struct f_obex		*obex = func_to_obex(f);
 
-	if (intf == obex->ctrl_id)
-		return 0;
-
-	return obex->port.in->driver_data ? 1 : 0;
+	return obex->cur_alt;
 }
 
 static void obex_disable(struct usb_function *f)