USB: centralize -EREMOTEIO handling

This patch (as969) continues the ongoing changes to the way HCDs
report URB statuses.  The programming interface has been simplified by
making usbcore responsible for clearing urb->hcpriv and for setting
-EREMOTEIO status when an URB with the URB_SHORT_NOT_OK flag ends up
as a short transfer.

By moving the work out of the HCDs, this removes a fair amount of
repeated code.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
CC: David Brownell <david-b@pacbell.net>
CC: Olav Kongas <ok@artecdesign.ee>
CC: Yoshihiro Shimoda <shimoda.yoshihiro@renesas.com>
CC: Tony Olech <tony.olech@elandigitalsystems.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 1 insertions, 6 deletions

diff --git a/drivers/usb/host/r8a66597-hcd.c b/drivers/usb/host/r8a66597-hcd.c
index 49cf998c172a..60248b01ce14 100644
--- a/drivers/usb/host/r8a66597-hcd.c
+++ b/drivers/usb/host/r8a66597-hcd.c
@@ -783,7 +783,6 @@ static void force_dequeue(struct r8a66597 *r8a66597, u16 pipenum, u16 address)
 
                 if (urb) {
                         urb->status = -ENODEV;
-                        urb->hcpriv = NULL;
                         usb_hcd_unlink_urb_from_ep(r8a66597_to_hcd(r8a66597),
                                         urb);
 
@@ -1134,7 +1133,6 @@ __releases(r8a66597->lock) __acquires(r8a66597->lock)
                 if (usb_pipeisoc(urb->pipe))
                         urb->start_frame = r8a66597_get_frame(hcd);
 
-                urb->hcpriv = NULL;
                 usb_hcd_unlink_urb_from_ep(r8a66597_to_hcd(r8a66597), urb);
 
                 spin_unlock(&r8a66597->lock);
@@ -1202,9 +1200,6 @@ static void packet_read(struct r8a66597 *r8a66597, u16 pipenum)
                 td->zero_packet = 1;
         if (rcv_len < bufsize) {
                 td->short_packet = 1;
-                if (urb->transfer_buffer_length != urb->actual_length &&
-                    urb->transfer_flags & URB_SHORT_NOT_OK)
-                        status = -EREMOTEIO;
         }
         if (usb_pipeisoc(urb->pipe)) {
                 urb->iso_frame_desc[td->iso_cnt].actual_length = size;
@@ -1214,7 +1209,7 @@ static void packet_read(struct r8a66597 *r8a66597, u16 pipenum)
         }
 
         /* check transfer finish */
-        if (check_transfer_finish(td, urb)) {
+        if (finish || check_transfer_finish(td, urb)) {
                 pipe_stop(r8a66597, td->pipe);
                 pipe_irq_disable(r8a66597, pipenum);
                 finish = 1;