Asynchronous probe leads to the change of disk name, so it is hard
to trace disk by its name for monitoring system.
Signed-off-by: longguang.yue <bigclouds@xxxxxxx>
---
drivers/scsi/sd.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index 4bb87043e6db..ea0ac8823599 100644
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -99,6 +99,11 @@ MODULE_ALIAS_SCSI_DEVICE(TYPE_ZBC);
#define SD_MINORS 16
+static unsigned int async = PROBE_PREFER_ASYNCHRONOUS;
+module_param(async, uint, 0644);
+MODULE_PARM_DESC(async,
+ "probe scsi disk asynchronously or not. Default is 1 asynchronous.");
+
static void sd_config_discard(struct scsi_disk *, unsigned int);
static void sd_config_write_same(struct scsi_disk *);
static int sd_revalidate_disk(struct gendisk *);
@@ -3839,6 +3844,9 @@ static int __init init_sd(void)
SCSI_LOG_HLQUEUE(3, printk("init_sd: sd driver entry point\n"));
+ if (async != PROBE_PREFER_ASYNCHRONOUS)
+ sd_template.gendrv.probe_type = PROBE_FORCE_SYNCHRONOUS;
+
for (i = 0; i < SD_MAJORS; i++) {
if (__register_blkdev(sd_major(i), "sd", sd_default_probe))
continue;
--
2.34.1
