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| author | Ingo Molnar <mingo@elte.hu> | 2008-09-14 18:24:00 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-09-14 18:24:00 +0200 |
| commit | 83bd6998b04fc1bb7280b14f16b2bdbdc07c914b (patch) | |
| tree | af1bbe2bac5752b69b1ac58bf5d822c735da439b /drivers/usb/storage/transport.c | |
| parent | e7250b8ae3870f37f660c2f65cafcaba85e3bfd3 (diff) | |
| parent | adee14b2e1557d0a8559f29681732d05a89dfc35 (diff) | |
| download | talos-obmc-linux-83bd6998b04fc1bb7280b14f16b2bdbdc07c914b.tar.gz talos-obmc-linux-83bd6998b04fc1bb7280b14f16b2bdbdc07c914b.zip | |
Merge commit 'v2.6.27-rc6' into timers/hpet
Diffstat (limited to 'drivers/usb/storage/transport.c')
| -rw-r--r-- | drivers/usb/storage/transport.c | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/drivers/usb/storage/transport.c b/drivers/usb/storage/transport.c index fcbbfdb7b2b0..3523a0bfa0ff 100644 --- a/drivers/usb/storage/transport.c +++ b/drivers/usb/storage/transport.c @@ -1032,8 +1032,21 @@ int usb_stor_Bulk_transport(struct scsi_cmnd *srb, struct us_data *us) /* try to compute the actual residue, based on how much data * was really transferred and what the device tells us */ - if (residue) { - if (!(us->fflags & US_FL_IGNORE_RESIDUE)) { + if (residue && !(us->fflags & US_FL_IGNORE_RESIDUE)) { + + /* Heuristically detect devices that generate bogus residues + * by seeing what happens with INQUIRY and READ CAPACITY + * commands. + */ + if (bcs->Status == US_BULK_STAT_OK && + scsi_get_resid(srb) == 0 && + ((srb->cmnd[0] == INQUIRY && + transfer_length == 36) || + (srb->cmnd[0] == READ_CAPACITY && + transfer_length == 8))) { + us->fflags |= US_FL_IGNORE_RESIDUE; + + } else { residue = min(residue, transfer_length); scsi_set_resid(srb, max(scsi_get_resid(srb), (int) residue)); |
