From: Alan Stern Date: Thu, 23 Mar 2006 20:05:16 +0000 (-0500) Subject: [PATCH] USB: g_file_storage: Set short_not_ok for bulk-out transfers X-Git-Tag: firefly_0821_release~36162 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=70ffe6e14d7c5db84b92841471ce6fd0200010cd;p=firefly-linux-kernel-4.4.55.git [PATCH] USB: g_file_storage: Set short_not_ok for bulk-out transfers I'm told that some UDC hardware may work better if it knows that receiving a short packet should always cause an error. Accordingly, this patch (as663) sets the short_not_ok flag for bulk-out transfers in g_file_storage. Oddly enough, there are no circumstances where that driver can legally receive a shorter-than-expected bulk-out packet. Signed-off-by: Alan Stern Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/usb/gadget/file_storage.c b/drivers/usb/gadget/file_storage.c index cf3be299e353..eb2821542b7c 100644 --- a/drivers/usb/gadget/file_storage.c +++ b/drivers/usb/gadget/file_storage.c @@ -1795,6 +1795,7 @@ static int do_write(struct fsg_dev *fsg) * the bulk-out maxpacket size */ bh->outreq->length = bh->bulk_out_intended_length = amount; + bh->outreq->short_not_ok = 1; start_transfer(fsg, fsg->bulk_out, bh->outreq, &bh->outreq_busy, &bh->state); fsg->next_buffhd_to_fill = bh->next; @@ -2398,6 +2399,7 @@ static int throw_away_data(struct fsg_dev *fsg) * the bulk-out maxpacket size */ bh->outreq->length = bh->bulk_out_intended_length = amount; + bh->outreq->short_not_ok = 1; start_transfer(fsg, fsg->bulk_out, bh->outreq, &bh->outreq_busy, &bh->state); fsg->next_buffhd_to_fill = bh->next; @@ -3029,6 +3031,7 @@ static int get_next_command(struct fsg_dev *fsg) /* Queue a request to read a Bulk-only CBW */ set_bulk_out_req_length(fsg, bh, USB_BULK_CB_WRAP_LEN); + bh->outreq->short_not_ok = 1; start_transfer(fsg, fsg->bulk_out, bh->outreq, &bh->outreq_busy, &bh->state);