[PATCH 01/14] scsi: pm80xx: Do not sleep in atomic context.

Sebastian Andrzej Siewior
2020-11-26T13:30:32Z

From: "Ahmed S. Darwish" <a.darwish@linutronix.de>

hw_event_sas_phy_up() is used in hardirq/softirq context:

pm8001_interrupt_handler_msix() || pm8001_interrupt_handler_intx() || pm8001_tasklet
=> PM8001_CHIP_DISP->isr() = pm80xx_chip_isr()
=> process_oq() [spin_lock_irqsave(&pm8001_ha->lock,)]
=> process_one_iomb()
=> mpi_hw_event()
=> hw_event_sas_phy_up()
=> msleep(200)

Revert the msleep() back to an mdelay() to avoid sleeping in atomic
context.

Fixes: 4daf1ef3c681 ("scsi: pm80xx: Convert 'long' mdelay to msleep")
Signed-off-by: Ahmed S. Darwish <a.darwish@linutronix.de>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: Vikram Auradkar <auradkar@google.com>
Cc: Jack Wang <jinpu.wang@cloud.ionos.com>
---
drivers/scsi/pm8001/pm80xx_hwi.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/scsi/pm8001/pm80xx_hwi.c b/drivers/scsi/pm8001/pm80xx_hwi.c
index 69f8244539e04..7d838e316657c 100644
--- a/drivers/scsi/pm8001/pm80xx_hwi.c
+++ b/drivers/scsi/pm8001/pm80xx_hwi.c
@@ -3296,7 +3296,7 @@ hw_event_sas_phy_up(struct pm8001_hba_info *pm8001_ha, void *piomb)
pm8001_get_attached_sas_addr(phy, phy->sas_phy.attached_sas_addr);
spin_unlock_irqrestore(&phy->sas_phy.frame_rcvd_lock, flags);
if (pm8001_ha->flags == PM8001F_RUN_TIME)
- msleep(200);/*delay a moment to wait disk to spinup*/
+ mdelay(200);/*delay a moment to wait disk to spinup*/
pm8001_bytes_dmaed(pm8001_ha, phy_id);
}

--
2.29.2