diff options
| -rw-r--r-- | drivers/scsi/sd.c | 27 |
1 files changed, 24 insertions, 3 deletions
diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c index dcff84abcdee..8eebaa8c6f52 100644 --- a/drivers/scsi/sd.c +++ b/drivers/scsi/sd.c @@ -1329,8 +1329,17 @@ static int read_capacity_16(struct scsi_disk *sdkp, struct scsi_device *sdp, if (media_not_present(sdkp, &sshdr)) return -ENODEV; - if (the_result) + if (the_result) { sense_valid = scsi_sense_valid(&sshdr); + if (sense_valid && + sshdr.sense_key == ILLEGAL_REQUEST && + (sshdr.asc == 0x20 || sshdr.asc == 0x24) && + sshdr.ascq == 0x00) + /* Invalid Command Operation Code or + * Invalid Field in CDB, just retry + * silently with RC10 */ + return -EINVAL; + } retries--; } while (the_result && retries); @@ -1414,6 +1423,15 @@ static int read_capacity_10(struct scsi_disk *sdkp, struct scsi_device *sdp, return sector_size; } +static int sd_try_rc16_first(struct scsi_device *sdp) +{ + if (sdp->scsi_level > SCSI_SPC_2) + return 1; + if (scsi_device_protection(sdp)) + return 1; + return 0; +} + /* * read disk capacity */ @@ -1423,11 +1441,14 @@ sd_read_capacity(struct scsi_disk *sdkp, unsigned char *buffer) int sector_size; struct scsi_device *sdp = sdkp->device; - /* Force READ CAPACITY(16) when PROTECT=1 */ - if (scsi_device_protection(sdp)) { + if (sd_try_rc16_first(sdp)) { sector_size = read_capacity_16(sdkp, sdp, buffer); if (sector_size == -EOVERFLOW) goto got_data; + if (sector_size == -ENODEV) + return; + if (sector_size < 0) + sector_size = read_capacity_10(sdkp, sdp, buffer); if (sector_size < 0) return; } else { |