github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-05-24 23:22:31 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

scsi: ufs: core: Handle sentinel value for dHIDAvailableSize

Browse Source 
JEDEC UFS spec defines 0xFFFFFFFF for dHIDAvailableSize as indicating no
valid fragmented size information. Returning the raw value can mislead
userspace. Return -ENODATA instead when the value is unavailable.

Signed-off-by: Keoseong Park <keosung.park@samsung.com>
Reviewed-by: Peter Wang <peter.wang@mediatek.com>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Link: https://patch.msgid.link/20251226042825epcms2p6f02ba12fa97ff4a69c00f6fb9ff55603@epcms2p6
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Keoseong Park 2025-12-26 13:28:25 +09:00 committed by Martin K. Petersen
parent 07959ef517
commit 695df7ea60
1 changed files with 4 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/ufs/core/ufs-sysfs.c
View File

@ -1847,6 +1847,7 @@ static ssize_t defrag_trigger_store(struct device *dev,
static DEVICE_ATTR_WO(defrag_trigger);
#define UFS_HID_AVAILABLE_SIZE_INVALID 0xFFFFFFFFU
static ssize_t fragmented_size_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
@ -1859,6 +1860,9 @@ static ssize_t fragmented_size_show(struct device *dev,
if (ret)
return ret;
if (value == UFS_HID_AVAILABLE_SIZE_INVALID)
return -ENODATA;
return sysfs_emit(buf, "%u\n", value);
}