diff options
Diffstat (limited to 'drivers/scsi/scsi_debug.c')
| -rw-r--r-- | drivers/scsi/scsi_debug.c | 83 |
1 files changed, 38 insertions, 45 deletions
diff --git a/drivers/scsi/scsi_debug.c b/drivers/scsi/scsi_debug.c index 82c06f0a9d02..31f7378c5c46 100644 --- a/drivers/scsi/scsi_debug.c +++ b/drivers/scsi/scsi_debug.c @@ -311,12 +311,47 @@ static void sdebug_max_tgts_luns(void); static struct device pseudo_primary; static struct bus_type pseudo_lld_bus; +static void get_data_transfer_info(unsigned char *cmd, + unsigned long long *lba, unsigned int *num) +{ + int i; + + switch (*cmd) { + case WRITE_16: + case READ_16: + for (*lba = 0, i = 0; i < 8; ++i) { + if (i > 0) + *lba <<= 8; + *lba += cmd[2 + i]; + } + *num = cmd[13] + (cmd[12] << 8) + + (cmd[11] << 16) + (cmd[10] << 24); + break; + case WRITE_12: + case READ_12: + *lba = cmd[5] + (cmd[4] << 8) + (cmd[3] << 16) + (cmd[2] << 24); + *num = cmd[9] + (cmd[8] << 8) + (cmd[7] << 16) + (cmd[6] << 24); + break; + case WRITE_10: + case READ_10: + *lba = cmd[5] + (cmd[4] << 8) + (cmd[3] << 16) + (cmd[2] << 24); + *num = cmd[8] + (cmd[7] << 8); + break; + case WRITE_6: + case READ_6: + *lba = cmd[3] + (cmd[2] << 8) + ((cmd[1] & 0x1f) << 16); + *num = (0 == cmd[4]) ? 256 : cmd[4]; + break; + default: + break; + } +} static int scsi_debug_queuecommand(struct scsi_cmnd * SCpnt, done_funct_t done) { unsigned char *cmd = (unsigned char *) SCpnt->cmnd; - int len, k, j; + int len, k; unsigned int num; unsigned long long lba; int errsts = 0; @@ -452,28 +487,7 @@ int scsi_debug_queuecommand(struct scsi_cmnd * SCpnt, done_funct_t done) break; if (scsi_debug_fake_rw) break; - if ((*cmd) == READ_16) { - for (lba = 0, j = 0; j < 8; ++j) { - if (j > 0) - lba <<= 8; - lba += cmd[2 + j]; - } - num = cmd[13] + (cmd[12] << 8) + - (cmd[11] << 16) + (cmd[10] << 24); - } else if ((*cmd) == READ_12) { - lba = cmd[5] + (cmd[4] << 8) + - (cmd[3] << 16) + (cmd[2] << 24); - num = cmd[9] + (cmd[8] << 8) + - (cmd[7] << 16) + (cmd[6] << 24); - } else if ((*cmd) == READ_10) { - lba = cmd[5] + (cmd[4] << 8) + - (cmd[3] << 16) + (cmd[2] << 24); - num = cmd[8] + (cmd[7] << 8); - } else { /* READ (6) */ - lba = cmd[3] + (cmd[2] << 8) + - ((cmd[1] & 0x1f) << 16); - num = (0 == cmd[4]) ? 256 : cmd[4]; - } + get_data_transfer_info(cmd, &lba, &num); errsts = resp_read(SCpnt, lba, num, devip); if (inj_recovered && (0 == errsts)) { mk_sense_buffer(devip, RECOVERED_ERROR, @@ -500,28 +514,7 @@ int scsi_debug_queuecommand(struct scsi_cmnd * SCpnt, done_funct_t done) break; if (scsi_debug_fake_rw) break; - if ((*cmd) == WRITE_16) { - for (lba = 0, j = 0; j < 8; ++j) { - if (j > 0) - lba <<= 8; - lba += cmd[2 + j]; - } - num = cmd[13] + (cmd[12] << 8) + - (cmd[11] << 16) + (cmd[10] << 24); - } else if ((*cmd) == WRITE_12) { - lba = cmd[5] + (cmd[4] << 8) + - (cmd[3] << 16) + (cmd[2] << 24); - num = cmd[9] + (cmd[8] << 8) + - (cmd[7] << 16) + (cmd[6] << 24); - } else if ((*cmd) == WRITE_10) { - lba = cmd[5] + (cmd[4] << 8) + - (cmd[3] << 16) + (cmd[2] << 24); - num = cmd[8] + (cmd[7] << 8); - } else { /* WRITE (6) */ - lba = cmd[3] + (cmd[2] << 8) + - ((cmd[1] & 0x1f) << 16); - num = (0 == cmd[4]) ? 256 : cmd[4]; - } + get_data_transfer_info(cmd, &lba, &num); errsts = resp_write(SCpnt, lba, num, devip); if (inj_recovered && (0 == errsts)) { mk_sense_buffer(devip, RECOVERED_ERROR, |