From 4918694ccd6974f3ec8eeda3f34ace0ce480153e Mon Sep 17 00:00:00 2001 From: Po-Wen Kao Date: Thu, 23 Jun 2022 11:50:49 +0800 Subject: [PATCH] scsi: ufs: ufs-mediatek: Disable reset confirm feature by UniPro In MediaTek UFS platforms, UniPro will not return reset confirm if it is in POWERDOWN state thus hang issue may happen while disabling UFSHCI. Simply disable this feature before UniPro leaves POWERDOWN state. Link: https://lore.kernel.org/r/20220623035052.18802-6-stanley.chu@mediatek.com Reviewed-by: Stanley Chu Reviewed-by: Bart Van Assche Signed-off-by: Po-Wen Kao Signed-off-by: Stanley Chu Signed-off-by: Martin K. Petersen --- drivers/ufs/host/ufs-mediatek.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/ufs/host/ufs-mediatek.c b/drivers/ufs/host/ufs-mediatek.c index 0cc7d4faccec..a7482f530f27 100644 --- a/drivers/ufs/host/ufs-mediatek.c +++ b/drivers/ufs/host/ufs-mediatek.c @@ -1079,6 +1079,11 @@ static int ufs_mtk_link_set_lpm(struct ufs_hba *hba) { int err; + /* Disable reset confirm feature by UniPro */ + ufshcd_writel(hba, + (ufshcd_readl(hba, REG_UFS_XOUFS_CTRL) & ~0x100), + REG_UFS_XOUFS_CTRL); + err = ufs_mtk_unipro_set_lpm(hba, true); if (err) { /* Resume UniPro state for following error recovery */