usb: gadget: f_fs: fix setup request handling

This patch fixes __ffs_ep0_queue_wait() function, which now returns number of
bytes transferred in USB request or error code in case of failure. This is
needed by ffs_ep0_read() function, when read data is copied to userspace.

It also cleans up code by removing usused variable ep0req_status.

Signed-off-by: Robert Baldyga <r.baldyga@samsung.com>
Acked-by: Michal Nazarewicz <mina86@mina86.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

2 files changed, 1 insertions, 2 deletions

diff --git a/drivers/usb/gadget/f_fs.c b/drivers/usb/gadget/f_fs.c
index 5bfacf8b9e6e..b65a5029deed 100644
--- a/drivers/usb/gadget/f_fs.c
+++ b/drivers/usb/gadget/f_fs.c
@@ -228,7 +228,7 @@ static int __ffs_ep0_queue_wait(struct ffs_data *ffs, char *data, size_t len)
         }
 
         ffs->setup_state = FFS_NO_SETUP;
-        return ffs->ep0req_status;
+        return req->status ? req->status : req->actual;
 }
 
 static int __ffs_ep0_stall(struct ffs_data *ffs)
diff --git a/drivers/usb/gadget/u_fs.h b/drivers/usb/gadget/u_fs.h
index 78263cc36df8..c39e805025b9 100644
--- a/drivers/usb/gadget/u_fs.h
+++ b/drivers/usb/gadget/u_fs.h
@@ -154,7 +154,6 @@ struct ffs_data {
          */
         struct usb_request              *ep0req;                /* P: mutex */
         struct completion               ep0req_completion;      /* P: mutex */
-        int                             ep0req_status;          /* P: mutex */
 
         /* reference counter */
         atomic_t                        ref;