diff options
Diffstat (limited to 'drivers/scsi/ufs/ufshcd.c')
| -rw-r--r-- | drivers/scsi/ufs/ufshcd.c | 28 |
1 files changed, 20 insertions, 8 deletions
diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c index 79591934ef45..2859f6395eea 100644 --- a/drivers/scsi/ufs/ufshcd.c +++ b/drivers/scsi/ufs/ufshcd.c @@ -264,6 +264,18 @@ static inline void ufshcd_disable_irq(struct ufs_hba *hba) } } +static void ufshcd_scsi_unblock_requests(struct ufs_hba *hba) +{ + if (atomic_dec_and_test(&hba->scsi_block_reqs_cnt)) + scsi_unblock_requests(hba->host); +} + +static void ufshcd_scsi_block_requests(struct ufs_hba *hba) +{ + if (atomic_inc_return(&hba->scsi_block_reqs_cnt) == 1) + scsi_block_requests(hba->host); +} + /* replace non-printable or non-ASCII characters with spaces */ static inline void ufshcd_remove_non_printable(char *val) { @@ -1074,12 +1086,12 @@ static int ufshcd_clock_scaling_prepare(struct ufs_hba *hba) * make sure that there are no outstanding requests when * clock scaling is in progress */ - scsi_block_requests(hba->host); + ufshcd_scsi_block_requests(hba); down_write(&hba->clk_scaling_lock); if (ufshcd_wait_for_doorbell_clr(hba, DOORBELL_CLR_TOUT_US)) { ret = -EBUSY; up_write(&hba->clk_scaling_lock); - scsi_unblock_requests(hba->host); + ufshcd_scsi_unblock_requests(hba); } return ret; @@ -1088,7 +1100,7 @@ static int ufshcd_clock_scaling_prepare(struct ufs_hba *hba) static void ufshcd_clock_scaling_unprepare(struct ufs_hba *hba) { up_write(&hba->clk_scaling_lock); - scsi_unblock_requests(hba->host); + ufshcd_scsi_unblock_requests(hba); } /** @@ -1460,7 +1472,7 @@ static void ufshcd_ungate_work(struct work_struct *work) hba->clk_gating.is_suspended = false; } unblock_reqs: - scsi_unblock_requests(hba->host); + ufshcd_scsi_unblock_requests(hba); } /** @@ -1516,7 +1528,7 @@ start: * work and to enable clocks. */ case CLKS_OFF: - scsi_block_requests(hba->host); + ufshcd_scsi_block_requests(hba); hba->clk_gating.state = REQ_CLKS_ON; trace_ufshcd_clk_gating(dev_name(hba->dev), hba->clk_gating.state); @@ -5298,7 +5310,7 @@ skip_err_handling: out: spin_unlock_irqrestore(hba->host->host_lock, flags); - scsi_unblock_requests(hba->host); + ufshcd_scsi_unblock_requests(hba); ufshcd_release(hba); pm_runtime_put_sync(hba->dev); } @@ -5400,7 +5412,7 @@ static void ufshcd_check_errors(struct ufs_hba *hba) /* handle fatal errors only when link is functional */ if (hba->ufshcd_state == UFSHCD_STATE_OPERATIONAL) { /* block commands from scsi mid-layer */ - scsi_block_requests(hba->host); + ufshcd_scsi_block_requests(hba); hba->ufshcd_state = UFSHCD_STATE_EH_SCHEDULED; @@ -8032,7 +8044,7 @@ int ufshcd_init(struct ufs_hba *hba, void __iomem *mmio_base, unsigned int irq) /* Hold auto suspend until async scan completes */ pm_runtime_get_sync(dev); - + atomic_set(&hba->scsi_block_reqs_cnt, 0); /* * We are assuming that device wasn't put in sleep/power-down * state exclusively during the boot stage before kernel. |