Commit e5eb72c9 authored by Niklas Cassel's avatar Niklas Cassel Committed by Martin K. Petersen
Browse files

scsi: libsas: Add dev_parent_is_expander() helper 



Many libsas drivers check if the parent of the device is an expander.
Create a helper that the libsas drivers will use in follow up commits.

Suggested-by: default avatarDamien Le Moal <dlemoal@kernel.org>
Signed-off-by: default avatarNiklas Cassel <cassel@kernel.org>
Link: https://lore.kernel.org/r/20250814173215.1765055-15-cassel@kernel.org


Reviewed-by: default avatarDamien Le Moal <dlemoal@kernel.org>
Reviewed-by: default avatarJohn Garry <john.g.garry@oracle.com>
Reviewed-by: default avatarJason Yan <yanaijie@huawei.com>
Signed-off-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
parent 251be2f6

drivers/scsi/libsas/sas_expander.c

+1 −4
Original line number Diff line number Diff line
@@ -1313,10 +1313,7 @@ static int sas_check_parent_topology(struct domain_device *child) 
	int i;

	int res = 0;



	if (!child->parent)

		return 0;



	if (!dev_is_expander(child->parent->dev_type))

	if (!dev_parent_is_expander(child))

		return 0;



	parent_ex = &child->parent->ex_dev;

include/scsi/libsas.h

+8 −0
Original line number Diff line number Diff line
@@ -203,6 +203,14 @@ static inline bool dev_is_expander(enum sas_device_type type) 
	       type == SAS_FANOUT_EXPANDER_DEVICE;

}



static inline bool dev_parent_is_expander(struct domain_device *dev)

{

	if (!dev->parent)

		return false;



	return dev_is_expander(dev->parent->dev_type);

}



static inline void INIT_SAS_WORK(struct sas_work *sw, void (*fn)(struct work_struct *))

{

	INIT_WORK(&sw->work, fn);