[PATCH AUTOSEL 4.9 01/13] scsi: ufs: skip shutdown if hba is not powered

[PATCH AUTOSEL 4.9 01/13] scsi: ufs: skip shutdown if hba is not powered

[Sasha Levin]

From: Stanley Chu <stanley.chu@mediatek.com>

[ Upstream commit f51913eef23f74c3bd07899dc7f1ed6df9e521d8 ]

In some cases, hba may go through shutdown flow without successful
initialization and then make system hang.

For example, if ufshcd_change_power_mode() gets error and leads to
ufshcd_hba_exit() to release resources of the host, future shutdown flow
may hang the system since the host register will be accessed in unpowered
state.

To solve this issue, simply add checking to skip shutdown for above kind of
situation.

Link: https://lore.kernel.org/r/1568780438-28753-1-git-send-email-stanley.chu@mediatek.com
Signed-off-by: Stanley Chu <stanley.chu@mediatek.com>
Acked-by: Bean Huo <beanhuo@micron.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/scsi/ufs/ufshcd.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index a9c172692f21d..26f259fb6e3ca 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -6492,6 +6492,9 @@ int ufshcd_shutdown(struct ufs_hba *hba)
 {
 	int ret = 0;
 
+	if (!hba->is_powered)
+		goto out;
+
 	if (ufshcd_is_ufs_dev_poweroff(hba) && ufshcd_is_link_off(hba))
 		goto out;
 
-- 
2.20.1

[PATCH AUTOSEL 4.9 02/13] scsi: megaraid: disable device when probe failed after enabled device

[Sasha Levin]

From: Xiang Chen <chenxiang66@hisilicon.com>

[ Upstream commit 70054aa39a013fa52eff432f2223b8bd5c0048f8 ]

For pci device, need to disable device when probe failed after enabled
device.

Link: https://lore.kernel.org/r/1567818450-173315-1-git-send-email-chenxiang66@hisilicon.com
Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com>
Reviewed-by: John Garry <john.garry@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/scsi/megaraid.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/scsi/megaraid.c b/drivers/scsi/megaraid.c
index 19bffe0b2cc0a..2cbfec6a74662 100644
--- a/drivers/scsi/megaraid.c
+++ b/drivers/scsi/megaraid.c
@@ -4219,11 +4219,11 @@ megaraid_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
 		 */
 		if (pdev->subsystem_vendor == PCI_VENDOR_ID_COMPAQ &&
 		    pdev->subsystem_device == 0xC000)
-		   	return -ENODEV;
+			goto out_disable_device;
 		/* Now check the magic signature byte */
 		pci_read_config_word(pdev, PCI_CONF_AMISIG, &magic);
 		if (magic != HBA_SIGNATURE_471 && magic != HBA_SIGNATURE)
-			return -ENODEV;
+			goto out_disable_device;
 		/* Ok it is probably a megaraid */
 	}
 
-- 
2.20.1

[PATCH AUTOSEL 4.9 03/13] scsi: qla2xxx: Fix unbound sleep in fcport delete path.

[Sasha Levin]

From: Quinn Tran <qutran@marvell.com>

[ Upstream commit c3b6a1d397420a0fdd97af2f06abfb78adc370df ]

There are instances, though rare, where a LOGO request cannot be sent out
and the thread in free session done can wait indefinitely. Fix this by
putting an upper bound to sleep.

Link: https://lore.kernel.org/r/20190912180918.6436-3-hmadhani@marvell.com
Signed-off-by: Quinn Tran <qutran@marvell.com>
Signed-off-by: Himanshu Madhani <hmadhani@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/scsi/qla2xxx/qla_target.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/scsi/qla2xxx/qla_target.c b/drivers/scsi/qla2xxx/qla_target.c
index 11f45cb998927..d13e91e164258 100644
--- a/drivers/scsi/qla2xxx/qla_target.c
+++ b/drivers/scsi/qla2xxx/qla_target.c
@@ -572,6 +572,7 @@ static void qlt_free_session_done(struct work_struct *work)
 
 	if (logout_started) {
 		bool traced = false;
+		u16 cnt = 0;
 
 		while (!ACCESS_ONCE(sess->logout_completed)) {
 			if (!traced) {
@@ -581,6 +582,9 @@ static void qlt_free_session_done(struct work_struct *work)
 				traced = true;
 			}
 			msleep(100);
+			cnt++;
+			if (cnt > 200)
+				break;
 		}
 
 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf087,
-- 
2.20.1