[PATCH v2] usb: gadget: Increase max configuration interface to 32

[Akash Kumar <quic_akakum@quicinc.com>]

Currently, max configuration interfaces are limited to 16, which fails
for compositions containing 10 UVC configurations with interrupt ep
disabled along with other configurations , and we see bind failures
while allocating interface ID in uvc bind.

Increase max configuration interface to 32 to support any large
compositions limited to same size as usb device endpoints as
interfaces cannot be more than endpoints.

Signed-off-by: Akash Kumar <quic_akakum@quicinc.com>
---
 include/linux/usb/composite.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Changes for v2:
Removed comment '/* arbitrary; max 255 */' as per review as it was
confusing as MAX_CONFIG_INTERFACES cannot go beyond 32 due to usb
ep limitation.

diff --git a/include/linux/usb/composite.h b/include/linux/usb/composite.h
index 2040696d75b6..d6d4fbfb6d0e 100644
--- a/include/linux/usb/composite.h
+++ b/include/linux/usb/composite.h
@@ -255,7 +255,7 @@ int config_ep_by_speed_and_alt(struct usb_gadget *g, struct usb_function *f,
 int config_ep_by_speed(struct usb_gadget *g, struct usb_function *f,
 			struct usb_ep *_ep);
 
-#define	MAX_CONFIG_INTERFACES		16	/* arbitrary; max 255 */
+#define	MAX_CONFIG_INTERFACES		32
 
 /**
  * struct usb_configuration - represents one gadget configuration
-- 
2.17.1