From b557217c8475f40bc765ee20ff6b3b9124c8a4fe Mon Sep 17 00:00:00 2001 From: Stanley Chu Date: Mon, 19 Aug 2019 21:43:28 +0800 Subject: [PATCH] scsi: ufs: fix broken hba->outstanding_tasks Currently bits in hba->outstanding_tasks are cleared only after their corresponding task management commands are successfully done by __ufshcd_issue_tm_cmd(). If timeout happens in a task management command, its corresponding bit in hba->outstanding_tasks will not be cleared until next task management command with the same tag used successfully finishes. This is wrong and can lead to some issues, like power issue. For example, ufshcd_release() and ufshcd_gate_work() will do nothing if hba->outstanding_tasks is not zero even if both UFS host and devices are actually idle. Solution is referred from error handling of device commands: bits in hba->outstanding_tasks shall be cleared regardless of their execution results. Signed-off-by: Stanley Chu Signed-off-by: Chun-Hung Wu Reviewed-by: Avri Altman Signed-off-by: Martin K. Petersen --- drivers/scsi/ufs/ufshcd.c | 9 ++++----- 1 file changed, 4 insertions(+), 5 deletions(-) diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c index 507fd51..ff6a440 100644 --- a/drivers/scsi/ufs/ufshcd.c +++ b/drivers/scsi/ufs/ufshcd.c @@ -5696,13 +5696,12 @@ static int __ufshcd_issue_tm_cmd(struct ufs_hba *hba, memcpy(treq, hba->utmrdl_base_addr + free_slot, sizeof(*treq)); ufshcd_add_tm_upiu_trace(hba, task_tag, "tm_complete"); - - spin_lock_irqsave(hba->host->host_lock, flags); - __clear_bit(free_slot, &hba->outstanding_tasks); - spin_unlock_irqrestore(hba->host->host_lock, flags); - } + spin_lock_irqsave(hba->host->host_lock, flags); + __clear_bit(free_slot, &hba->outstanding_tasks); + spin_unlock_irqrestore(hba->host->host_lock, flags); + clear_bit(free_slot, &hba->tm_condition); ufshcd_put_tm_slot(hba, free_slot); wake_up(&hba->tm_tag_wq); -- 2.7.4