diff options
| author | Deepak Ukey <deepak.ukey@microchip.com> | 2018-09-11 11:48:04 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-11-20 19:59:56 +0300 |
| commit | d36d5fbfe15cdc0c553e924dad53f14a6b3de77f (patch) | |
| tree | a3ffe37ca05af284e27447dad63eb1512bf19424 /drivers/scsi/pm8001/pm8001_hwi.c | |
| parent | f84f69da3610b57a5f3720f8ca6943761203dfa9 (diff) | |
| download | linux-d36d5fbfe15cdc0c553e924dad53f14a6b3de77f.tar.xz | |
scsi: pm80xx: Fixed system hang issue during kexec boot
[ Upstream commit 72349b62a571effd6faadd0600b8e657dd87afbf ]
When the firmware is not responding, execution of kexec boot causes a system
hang. When firmware assertion happened, driver get notified with interrupt
vector updated in MPI configuration table. Then, the driver will read
scratchpad register and set controller_fatal_error flag to true.
Signed-off-by: Deepak Ukey <deepak.ukey@microchip.com>
Signed-off-by: Viswas G <Viswas.G@microchip.com>
Acked-by: Jack Wang <jinpu.wang@profitbricks.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/scsi/pm8001/pm8001_hwi.c')
| -rw-r--r-- | drivers/scsi/pm8001/pm8001_hwi.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/scsi/pm8001/pm8001_hwi.c b/drivers/scsi/pm8001/pm8001_hwi.c index 10546faac58c..f374abfb7f1f 100644 --- a/drivers/scsi/pm8001/pm8001_hwi.c +++ b/drivers/scsi/pm8001/pm8001_hwi.c @@ -1479,6 +1479,12 @@ u32 pm8001_mpi_msg_consume(struct pm8001_hba_info *pm8001_ha, } else { u32 producer_index; void *pi_virt = circularQ->pi_virt; + /* spurious interrupt during setup if + * kexec-ing and driver doing a doorbell access + * with the pre-kexec oq interrupt setup + */ + if (!pi_virt) + break; /* Update the producer index from SPC */ producer_index = pm8001_read_32(pi_virt); circularQ->producer_index = cpu_to_le32(producer_index); |