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Damien Le Moal 24eca2dce0 scsi: sd: Introduce manage_shutdown device flag Commit `aa3998dbeb` ("ata: libata-scsi: Disable scsi device manage_system_start_stop") change setting the manage_system_start_stop flag to false for libata managed disks to enable libata internal management of disk suspend/resume. However, a side effect of this change is that on system shutdown, disks are no longer being stopped (set to standby mode with the heads unloaded). While this is not a critical issue, this unclean shutdown is not recommended and shows up with increased smart counters (e.g. the unexpected power loss counter "Unexpect_Power_Loss_Ct"). Instead of defining a shutdown driver method for all ATA adapter drivers (not all of them define that operation), this patch resolves this issue by further refining the sd driver start/stop control of disks using the new flag manage_shutdown. If this new flag is set to true by a low level driver, the function sd_shutdown() will issue a START STOP UNIT command with the start argument set to 0 when a disk needs to be powered off (suspended) on system power off, that is, when system_state is equal to SYSTEM_POWER_OFF. Similarly to the other manage_xxx flags, the new manage_shutdown flag is exposed through sysfs as a read-write device attribute. To avoid any confusion between manage_shutdown and manage_system_start_stop, the comments describing these flags in include/scsi/scsi.h are also improved. Fixes: `aa3998dbeb` ("ata: libata-scsi: Disable scsi device manage_system_start_stop") Cc: stable@vger.kernel.org Closes: https://bugzilla.kernel.org/show_bug.cgi?id=218038 Link: https://lore.kernel.org/all/cd397c88-bf53-4768-9ab8-9d107df9e613@gmail.com/ Signed-off-by: Damien Le Moal <dlemoal@kernel.org> Reviewed-by: Niklas Cassel <niklas.cassel@wdc.com> Reviewed-by: Hannes Reinecke <hare@suse.de> Reviewed-by: James Bottomley <James.Bottomley@HansenPartnership.com> Acked-by: Martin K. Petersen <martin.petersen@oracle.com>		2023-10-27 10:00:19 +09:00
arch	Misc fixes:	2023-10-08 09:27:20 -07:00
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Documentation	Devicetree fixes for v6.6, part 2:	2023-10-07 10:05:16 -07:00
drivers	scsi: sd: Introduce manage_shutdown device flag	2023-10-27 10:00:19 +09:00
fs	Six SMB3 server fixes	2023-10-08 10:10:52 -07:00
include	scsi: sd: Introduce manage_shutdown device flag	2023-10-27 10:00:19 +09:00
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MAINTAINERS	- Fix memory leak when freeing dm zoned target device	2023-10-07 10:17:48 -07:00
Makefile	Linux 6.6-rc5	2023-10-08 13:49:43 -07:00
README

README

Linux kernel
============

There are several guides for kernel developers and users. These guides can
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There are various text files in the Documentation/ subdirectory,
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Please read the Documentation/process/changes.rst file, as it contains the
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the problems which may result by upgrading your kernel.