@@ -101,6 +101,11 @@ parameters may be changed at runtime by the command
allowing boot to proceed. none ignores them, expecting
user space to do the scan.
+ sd_mod.stop_before_reboot=
+ [SCSI] configure stop action for disks before a reboot
+ Format: <integer>
+ 0 = disabled (default), 1 = enabled
+
sim710= [SCSI,HW]
See header of drivers/scsi/sim710.c.
@@ -98,6 +98,12 @@ MODULE_ALIAS_SCSI_DEVICE(TYPE_MOD);
MODULE_ALIAS_SCSI_DEVICE(TYPE_RBC);
MODULE_ALIAS_SCSI_DEVICE(TYPE_ZBC);
+static unsigned int stop_before_reboot = 0;
+
+module_param(stop_before_reboot, uint, 0644);
+MODULE_PARM_DESC(stop_before_reboot,
+ "stop disks before reboot");
+
#if !defined(CONFIG_DEBUG_BLOCK_EXT_DEVT)
#define SD_MINORS 16
#else
@@ -3576,9 +3582,11 @@ static void sd_shutdown(struct device *dev)
sd_sync_cache(sdkp, NULL);
}
- if (system_state != SYSTEM_RESTART && sdkp->device->manage_start_stop) {
- sd_printk(KERN_NOTICE, sdkp, "Stopping disk\n");
- sd_start_stop_device(sdkp, 0);
+ if (sdkp->device->manage_start_stop) {
+ if (system_state != SYSTEM_RESTART || stop_before_reboot) {
+ sd_printk(KERN_NOTICE, sdkp, "Stopping disk\n");
+ sd_start_stop_device(sdkp, 0);
+ }
}
}
I need to use "reboot=p" on my desktop because one of the PCIe devices does not appear after a warm boot. This results in a very cold boot because the BIOS turns the PSU off and on. The scsi sd shutdown process does not send a stop command to disks before the reboot happens (stop commands are only sent for a shutdown). The result is that all of my SSDs experience a sudden power loss on every reboot, which is undesirable behaviour because it could cause data to be corrupted. These events are recorded in the SMART attributes. Add a "stop_before_reboot" module parameter that can be used to control the shutdown behaviour of disks before a reboot. The default will be the existing behaviour (disks are not stopped). sd_mod.stop_before_reboot=<integer> 0 = disabled (default) 1 = enabled The behaviour on shutdown is unchanged: all disks are unconditionally stopped. Signed-off-by: Simon Arlott <simon@octiron.net> --- Documentation/scsi/scsi-parameters.rst | 5 +++++ drivers/scsi/sd.c | 14 +++++++++++--- 2 files changed, 16 insertions(+), 3 deletions(-)