From: Jaegeuk Kim <[email protected]> In order to conduct FFU or RPMB operations, UFS needs to clear UAC. This patch clears it explicitly, so that we could get no failure given early execution.
Cc: Alim Akhtar <[email protected]> Cc: Avri Altman <[email protected]> Signed-off-by: Jaegeuk Kim <[email protected]> --- drivers/scsi/ufs/ufshcd.c | 41 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 41 insertions(+) diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c index d929c3d1e58cc..5deba03a61f75 100644 --- a/drivers/scsi/ufs/ufshcd.c +++ b/drivers/scsi/ufs/ufshcd.c @@ -7385,6 +7385,45 @@ static int ufshcd_add_lus(struct ufs_hba *hba) return ret; } +static int +ufshcd_send_request_sense(struct ufs_hba *hba, struct scsi_device *sdp); + +static int ufshcd_clear_uac(struct ufs_hba *hba) +{ + struct scsi_device *sdp; + unsigned long flags; + int ret = 0; + + spin_lock_irqsave(hba->host->host_lock, flags); + sdp = hba->sdev_ufs_device; + if (sdp) { + ret = scsi_device_get(sdp); + if (!ret && !scsi_device_online(sdp)) { + ret = -ENODEV; + scsi_device_put(sdp); + } + } else { + ret = -ENODEV; + } + spin_unlock_irqrestore(hba->host->host_lock, flags); + if (ret) + goto out_err; + + if (hba->wlun_dev_clr_ua) { + ret = ufshcd_send_request_sense(hba, sdp); + if (ret) + goto out; + /* Unit attention condition is cleared now */ + hba->wlun_dev_clr_ua = false; + } +out: + scsi_device_put(sdp); +out_err: + if (ret) + dev_err(hba->dev, "%s: Failed UAC clear ret = %d\n", __func__, ret); + return ret; +} + /** * ufshcd_probe_hba - probe hba to detect device and initialize * @hba: per-adapter instance @@ -7500,6 +7539,8 @@ static void ufshcd_async_scan(void *data, async_cookie_t cookie) pm_runtime_put_sync(hba->dev); ufshcd_exit_clk_scaling(hba); ufshcd_hba_exit(hba); + } else { + ufshcd_clear_uac(hba); } } -- 2.28.0.618.gf4bc123cb7-goog
