[PATCH 6.6 129/322] scsi: hisi_sas: Set .phy_attached before notifing phyup event HISI_PHYE_PHY_UP_PM

Greg Kroah-Hartman
2024-02-03T04:13:04Z

From: Yihang Li <liyihang9@huawei.com>

[ Upstream commit ce26497c745d0541aec930d5211b431a1c26af97 ]

Currently in directly attached scenario, the phyup event
HISI_PHYE_PHY_UP_PM is notified before .phy_attached is set - this may
cause the phyup work hisi_sas_bytes_dmaed() execution failed and the
attached device will not be found.

To fix it, set .phy_attached before notifing phyup event.

Signed-off-by: Yihang Li <liyihang9@huawei.com>
Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com>
Link: https://lore.kernel.org/r/1702525516-51258-2-git-send-email-chenxiang66@hisilicon.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/scsi/hisi_sas/hisi_sas_v3_hw.c | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c b/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c
index 520fffc14282..e914c0c13bb5 100644
--- a/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c
+++ b/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c
@@ -1606,6 +1606,11 @@ static irqreturn_t phy_up_v3_hw(int phy_no, struct hisi_hba *hisi_hba)
}

phy->port_id = port_id;
+ spin_lock(&phy->lock);
+ /* Delete timer and set phy_attached atomically */
+ del_timer(&phy->timer);
+ phy->phy_attached = 1;
+ spin_unlock(&phy->lock);

/*
* Call pm_runtime_get_noresume() which pairs with
@@ -1619,11 +1624,6 @@ static irqreturn_t phy_up_v3_hw(int phy_no, struct hisi_hba *hisi_hba)

res = IRQ_HANDLED;

- spin_lock(&phy->lock);
- /* Delete timer and set phy_attached atomically */
- del_timer(&phy->timer);
- phy->phy_attached = 1;
- spin_unlock(&phy->lock);
end:
if (phy->reset_completion)
complete(phy->reset_completion);
--
2.43.0