diff options
Diffstat (limited to 'drivers/scsi')
| -rw-r--r-- | drivers/scsi/scsi_debug.c | 44 |
1 files changed, 7 insertions, 37 deletions
diff --git a/drivers/scsi/scsi_debug.c b/drivers/scsi/scsi_debug.c index ac74cbde7adf..88bfe0fb72ee 100644 --- a/drivers/scsi/scsi_debug.c +++ b/drivers/scsi/scsi_debug.c @@ -4040,7 +4040,7 @@ MODULE_PARM_DESC(dsense, "use descriptor sense format(def=0 -> fixed)"); MODULE_PARM_DESC(every_nth, "timeout every nth command(def=0)"); MODULE_PARM_DESC(fake_rw, "fake reads/writes instead of copying (def=0)"); MODULE_PARM_DESC(guard, "protection checksum: 0=crc, 1=ip (def=0)"); -MODULE_PARM_DESC(host_lock, "use host_lock around all commands (def=0)"); +MODULE_PARM_DESC(host_lock, "host_lock is ignored (def=0)"); MODULE_PARM_DESC(lbpu, "enable LBP, support UNMAP command (def=0)"); MODULE_PARM_DESC(lbpws, "enable LBP, support WRITE SAME(16) with UNMAP bit (def=0)"); MODULE_PARM_DESC(lbpws10, "enable LBP, support WRITE SAME(10) with UNMAP bit (def=0)"); @@ -4592,30 +4592,15 @@ static ssize_t host_lock_show(struct device_driver *ddp, char *buf) { return scnprintf(buf, PAGE_SIZE, "%d\n", !!sdebug_host_lock); } -/* Returns -EBUSY if host_lock is being changed and commands are queued */ +/* N.B. sdebug_host_lock does nothing, kept for backward compatibility */ static ssize_t host_lock_store(struct device_driver *ddp, const char *buf, size_t count) { - int n, res; + int n; if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { - bool new_host_lock = (n > 0); - - res = count; - if (new_host_lock != sdebug_host_lock) { - unsigned long iflags; - int k; - - spin_lock_irqsave(&queued_arr_lock, iflags); - k = find_first_bit(queued_in_use_bm, - sdebug_max_queue); - if (k != sdebug_max_queue) - res = -EBUSY; /* have queued commands */ - else - sdebug_host_lock = new_host_lock; - spin_unlock_irqrestore(&queued_arr_lock, iflags); - } - return res; + sdebug_host_lock = (n > 0); + return count; } return -EINVAL; } @@ -5035,7 +5020,7 @@ check_inject(struct scsi_cmnd *scp) } static int -scsi_debug_queuecommand(struct scsi_cmnd *scp) +scsi_debug_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *scp) { u8 sdeb_i; struct scsi_device *sdp = scp->device; @@ -5170,21 +5155,6 @@ check_cond: return schedule_resp(scp, devip, check_condition_result, 0); } -static int -sdebug_queuecommand_lock_or_not(struct Scsi_Host *shost, struct scsi_cmnd *cmd) -{ - if (sdebug_host_lock) { - unsigned long iflags; - int rc; - - spin_lock_irqsave(shost->host_lock, iflags); - rc = scsi_debug_queuecommand(cmd); - spin_unlock_irqrestore(shost->host_lock, iflags); - return rc; - } else - return scsi_debug_queuecommand(cmd); -} - static struct scsi_host_template sdebug_driver_template = { .show_info = scsi_debug_show_info, .write_info = scsi_debug_write_info, @@ -5195,7 +5165,7 @@ static struct scsi_host_template sdebug_driver_template = { .slave_configure = scsi_debug_slave_configure, .slave_destroy = scsi_debug_slave_destroy, .ioctl = scsi_debug_ioctl, - .queuecommand = sdebug_queuecommand_lock_or_not, + .queuecommand = scsi_debug_queuecommand, .change_queue_depth = sdebug_change_qdepth, .eh_abort_handler = scsi_debug_abort, .eh_device_reset_handler = scsi_debug_device_reset, |