diff options
Diffstat (limited to 'drivers/block/pktcdvd.c')
| -rw-r--r-- | drivers/block/pktcdvd.c | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/drivers/block/pktcdvd.c b/drivers/block/pktcdvd.c index 2f1a92509271..5ae2a80db2c3 100644 --- a/drivers/block/pktcdvd.c +++ b/drivers/block/pktcdvd.c @@ -1869,12 +1869,12 @@ static noinline_for_stack int pkt_probe_settings(struct pktcdvd_device *pd) /* * enable/disable write caching on drive */ -static noinline_for_stack int pkt_write_caching(struct pktcdvd_device *pd, - int set) +static noinline_for_stack int pkt_write_caching(struct pktcdvd_device *pd) { struct packet_command cgc; struct scsi_sense_hdr sshdr; unsigned char buf[64]; + bool set = IS_ENABLED(CONFIG_CDROM_PKTCDVD_WCACHE); int ret; init_cdrom_command(&cgc, buf, sizeof(buf), CGC_DATA_READ); @@ -1890,7 +1890,12 @@ static noinline_for_stack int pkt_write_caching(struct pktcdvd_device *pd, if (ret) return ret; - buf[pd->mode_offset + 10] |= (!!set << 2); + /* + * use drive write caching -- we need deferred error handling to be + * able to successfully recover with this option (drive will return good + * status as soon as the cdb is validated). + */ + buf[pd->mode_offset + 10] |= (set << 2); cgc.buflen = cgc.cmd[8] = 2 + ((buf[0] << 8) | (buf[1] & 0xff)); ret = pkt_mode_select(pd, &cgc); @@ -2085,7 +2090,7 @@ static int pkt_open_write(struct pktcdvd_device *pd) return -EIO; } - pkt_write_caching(pd, USE_WCACHING); + pkt_write_caching(pd); ret = pkt_get_max_speed(pd, &write_speed); if (ret) |