diff options
Diffstat (limited to 'drivers/usb/gadget/f_mass_storage.c')
| -rw-r--r-- | drivers/usb/gadget/f_mass_storage.c | 18 |
1 files changed, 9 insertions, 9 deletions
diff --git a/drivers/usb/gadget/f_mass_storage.c b/drivers/usb/gadget/f_mass_storage.c index 756941473148..927ee88278bd 100644 --- a/drivers/usb/gadget/f_mass_storage.c +++ b/drivers/usb/gadget/f_mass_storage.c @@ -958,9 +958,7 @@ static int do_write(struct fsg_common *common) * equal to the buffer size, which is divisible by * the bulk-out maxpacket size. */ - bh->outreq->length = amount; - bh->bulk_out_intended_length = amount; - bh->outreq->short_not_ok = 1; + set_bulk_out_req_length(common, bh, amount); if (!start_out_transfer(common, bh)) /* Dunno what to do if common->fsg is NULL */ return -EIO; @@ -995,6 +993,11 @@ static int do_write(struct fsg_common *common) amount = curlun->file_length - file_offset; } + /* Don't accept excess data. The spec doesn't say + * what to do in this case. We'll ignore the error. + */ + amount = min(amount, bh->bulk_out_intended_length); + /* Don't write a partial block */ amount = round_down(amount, curlun->blksize); if (amount == 0) @@ -1034,7 +1037,7 @@ static int do_write(struct fsg_common *common) empty_write: /* Did the host decide to stop early? */ - if (bh->outreq->actual != bh->outreq->length) { + if (bh->outreq->actual < bh->bulk_out_intended_length) { common->short_packet_received = 1; break; } @@ -1592,7 +1595,7 @@ static int throw_away_data(struct fsg_common *common) common->next_buffhd_to_drain = bh->next; /* A short packet or an error ends everything */ - if (bh->outreq->actual != bh->outreq->length || + if (bh->outreq->actual < bh->bulk_out_intended_length || bh->outreq->status != 0) { raise_exception(common, FSG_STATE_ABORT_BULK_OUT); @@ -1612,9 +1615,7 @@ static int throw_away_data(struct fsg_common *common) * equal to the buffer size, which is divisible by * the bulk-out maxpacket size. */ - bh->outreq->length = amount; - bh->bulk_out_intended_length = amount; - bh->outreq->short_not_ok = 1; + set_bulk_out_req_length(common, bh, amount); if (!start_out_transfer(common, bh)) /* Dunno what to do if common->fsg is NULL */ return -EIO; @@ -2289,7 +2290,6 @@ static int get_next_command(struct fsg_common *common) /* Queue a request to read a Bulk-only CBW */ set_bulk_out_req_length(common, bh, USB_BULK_CB_WRAP_LEN); - bh->outreq->short_not_ok = 1; if (!start_out_transfer(common, bh)) /* Don't know what to do if common->fsg is NULL */ return -EIO; |