Messages in this thread Patch in this message | | | From | Zhang Hui <> | Subject | [PATCH v1 1/1] scsi: ufs: core: Fix ufshcd_inc_sq_tail function bug | Date | Thu, 1 Jun 2023 17:13:57 +0800 |
| |
From: zhanghui <zhanghui31@xiaomi.com>
If q->max_entries is not multiple of 32, mask not every bit is 1. So q->sq_tail_slot some bit will be cleared by use this way.
Signed-off-by: zhanghui <zhanghui31@xiaomi.com> --- drivers/ufs/core/ufshcd-priv.h | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/ufs/core/ufshcd-priv.h b/drivers/ufs/core/ufshcd-priv.h index d53b93c21a0c..319fba31c1f5 100644 --- a/drivers/ufs/core/ufshcd-priv.h +++ b/drivers/ufs/core/ufshcd-priv.h @@ -366,10 +366,11 @@ static inline bool ufs_is_valid_unit_desc_lun(struct ufs_dev_info *dev_info, u8 static inline void ufshcd_inc_sq_tail(struct ufs_hw_queue *q) __must_hold(&q->sq_lock) { - u32 mask = q->max_entries - 1; u32 val; - q->sq_tail_slot = (q->sq_tail_slot + 1) & mask; + q->sq_tail_slot++; + if (q->sq_tail_slot == q->max_entries) + q->sq_tail_slot = 0; val = q->sq_tail_slot * sizeof(struct utp_transfer_req_desc); writel(val, q->mcq_sq_tail); } -- 2.39.0
| |