diff options
Diffstat (limited to 'drivers/scsi/sr.c')
| -rw-r--r-- | drivers/scsi/sr.c | 49 |
1 files changed, 27 insertions, 22 deletions
diff --git a/drivers/scsi/sr.c b/drivers/scsi/sr.c index 50ba4925020..208565bdbe8 100644 --- a/drivers/scsi/sr.c +++ b/drivers/scsi/sr.c @@ -163,6 +163,29 @@ static void scsi_cd_put(struct scsi_cd *cd) mutex_unlock(&sr_ref_mutex); } +/* identical to scsi_test_unit_ready except that it doesn't + * eat the NOT_READY returns for removable media */ +int sr_test_unit_ready(struct scsi_device *sdev, struct scsi_sense_hdr *sshdr) +{ + int retries = MAX_RETRIES; + int the_result; + u8 cmd[] = {TEST_UNIT_READY, 0, 0, 0, 0, 0 }; + + /* issue TEST_UNIT_READY until the initial startup UNIT_ATTENTION + * conditions are gone, or a timeout happens + */ + do { + the_result = scsi_execute_req(sdev, cmd, DMA_NONE, NULL, + 0, sshdr, SR_TIMEOUT, + retries--); + + } while (retries > 0 && + (!scsi_status_is_good(the_result) || + (scsi_sense_valid(sshdr) && + sshdr->sense_key == UNIT_ATTENTION))); + return the_result; +} + /* * This function checks to see if the media has been changed in the * CDROM drive. It is possible that we have already sensed a change, @@ -185,8 +208,7 @@ static int sr_media_change(struct cdrom_device_info *cdi, int slot) } sshdr = kzalloc(sizeof(*sshdr), GFP_KERNEL); - retval = scsi_test_unit_ready(cd->device, SR_TIMEOUT, MAX_RETRIES, - sshdr); + retval = sr_test_unit_ready(cd->device, sshdr); if (retval || (scsi_sense_valid(sshdr) && /* 0x3a is medium not present */ sshdr->asc == 0x3a)) { @@ -733,10 +755,8 @@ static void get_capabilities(struct scsi_cd *cd) { unsigned char *buffer; struct scsi_mode_data data; - unsigned char cmd[MAX_COMMAND_SIZE]; struct scsi_sense_hdr sshdr; - unsigned int the_result; - int retries, rc, n; + int rc, n; static const char *loadmech[] = { @@ -758,23 +778,8 @@ static void get_capabilities(struct scsi_cd *cd) return; } - /* issue TEST_UNIT_READY until the initial startup UNIT_ATTENTION - * conditions are gone, or a timeout happens - */ - retries = 0; - do { - memset((void *)cmd, 0, MAX_COMMAND_SIZE); - cmd[0] = TEST_UNIT_READY; - - the_result = scsi_execute_req (cd->device, cmd, DMA_NONE, NULL, - 0, &sshdr, SR_TIMEOUT, - MAX_RETRIES); - - retries++; - } while (retries < 5 && - (!scsi_status_is_good(the_result) || - (scsi_sense_valid(&sshdr) && - sshdr.sense_key == UNIT_ATTENTION))); + /* eat unit attentions */ + sr_test_unit_ready(cd->device, &sshdr); /* ask for mode page 0x2a */ rc = scsi_mode_sense(cd->device, 0, 0x2a, buffer, 128, |