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FROMGIT: scsi: ufs: core: Use is_visible to control UFS unit descriptor sysfs nodes

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UFS Boot and Device W-LUs do not have unit descriptors and RPMB does not
support WB. Use is_visible() to control which nodes are visible and which
are not.

Change-Id: I24942df70a1d077fff291a23df9cbbd0d5e8f1df
Signed-off-by: Bean Huo <beanhuo@micron.com>
Link: https://lore.kernel.org/r/20221025222430.277768-4-beanhuo@iokpp.de
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Arthur Simchaev <arthur.simchaev@wdc.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
(cherry picked from commit 9d266e792b git://git.kernel.org/pub/scm/linux/kernel/git/mkp/scsi.git for-next)
Signed-off-by: Bart Van Assche <bvanassche@google.com>
This commit is contained in:
Bean Huo
2022-10-26 00:24:30 +02:00
committed by Treehugger Robot
parent a0de7900a4
commit a1b3bcf98d
1 changed files with 18 additions and 0 deletions
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18
drivers/ufs/core/ufs-sysfs.c
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@@ -1287,9 +1287,27 @@ static struct attribute *ufs_sysfs_unit_descriptor[] = {
NULL,
};
static umode_t ufs_unit_descriptor_is_visible(struct kobject *kobj, struct attribute *attr, int n)
{
struct device *dev = container_of(kobj, struct device, kobj);
struct scsi_device *sdev = to_scsi_device(dev);
u8 lun = ufshcd_scsi_to_upiu_lun(sdev->lun);
umode_t mode = attr->mode;
if (lun == UFS_UPIU_BOOT_WLUN || lun == UFS_UPIU_UFS_DEVICE_WLUN)
/* Boot and device WLUN have no unit descriptors */
mode = 0;
if (lun == UFS_UPIU_RPMB_WLUN && attr == &dev_attr_wb_buf_alloc_units.attr)
mode = 0;
return mode;
}
const struct attribute_group ufs_sysfs_unit_descriptor_group = {
.name = "unit_descriptor",
.attrs = ufs_sysfs_unit_descriptor,
.is_visible = ufs_unit_descriptor_is_visible,
};
static ssize_t dyn_cap_needed_attribute_show(struct device *dev,