diff options
| author | Tony Lindgren <tony@atomide.com> | 2011-06-14 05:53:42 -0700 |
|---|---|---|
| committer | Tony Lindgren <tony@atomide.com> | 2011-06-14 05:53:42 -0700 |
| commit | b8ce9fb8e18af7466e0b915bb5979322cdace322 (patch) | |
| tree | eec6f9b58ce154fd863f0f78b374a697a5a7139b /drivers/usb/storage/transport.c | |
| parent | c8e0bf95fc01d6e2ca585fe08010800b6c56e823 (diff) | |
| parent | e9e35c5a2b2c803b5e2f25906d8ffe110670ceb6 (diff) | |
Merge branch 'fixes-v3.0-rc3' into devel-fixes
Diffstat (limited to 'drivers/usb/storage/transport.c')
| -rw-r--r-- | drivers/usb/storage/transport.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/drivers/usb/storage/transport.c b/drivers/usb/storage/transport.c index 00418995d8e..e8ae21b2d38 100644 --- a/drivers/usb/storage/transport.c +++ b/drivers/usb/storage/transport.c @@ -819,6 +819,35 @@ Retry_Sense: } } + /* + * Some devices don't work or return incorrect data the first + * time they get a READ(10) command, or for the first READ(10) + * after a media change. If the INITIAL_READ10 flag is set, + * keep track of whether READ(10) commands succeed. If the + * previous one succeeded and this one failed, set the REDO_READ10 + * flag to force a retry. + */ + if (unlikely((us->fflags & US_FL_INITIAL_READ10) && + srb->cmnd[0] == READ_10)) { + if (srb->result == SAM_STAT_GOOD) { + set_bit(US_FLIDX_READ10_WORKED, &us->dflags); + } else if (test_bit(US_FLIDX_READ10_WORKED, &us->dflags)) { + clear_bit(US_FLIDX_READ10_WORKED, &us->dflags); + set_bit(US_FLIDX_REDO_READ10, &us->dflags); + } + + /* + * Next, if the REDO_READ10 flag is set, return a result + * code that will cause the SCSI core to retry the READ(10) + * command immediately. + */ + if (test_bit(US_FLIDX_REDO_READ10, &us->dflags)) { + clear_bit(US_FLIDX_REDO_READ10, &us->dflags); + srb->result = DID_IMM_RETRY << 16; + srb->sense_buffer[0] = 0; + } + } + /* Did we transfer less than the minimum amount required? */ if ((srb->result == SAM_STAT_GOOD || srb->sense_buffer[2] == 0) && scsi_bufflen(srb) - scsi_get_resid(srb) < srb->underflow) |