[PATCH AUTOSEL 5.10 08/10] scsi: mpt3sas: Diag-Reset when Doorbell-In-Use bit is set during driver load time

Sasha Levin
2024-12-11T18:54:36Z

From: Ranjan Kumar <ranjan.kumar@broadcom.com>

[ Upstream commit 3f5eb062e8aa335643181c480e6c590c6cedfd22 ]

Issue a Diag-Reset when the "Doorbell-In-Use" bit is set during the
driver load/initialization.

Signed-off-by: Ranjan Kumar <ranjan.kumar@broadcom.com>
Link: https://lore.kernel.org/r/20241110173341.11595-2-ranjan.kumar@broadcom.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/scsi/mpt3sas/mpt3sas_base.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/scsi/mpt3sas/mpt3sas_base.c b/drivers/scsi/mpt3sas/mpt3sas_base.c
index 53528711dac1f..768635de93da9 100644
--- a/drivers/scsi/mpt3sas/mpt3sas_base.c
+++ b/drivers/scsi/mpt3sas/mpt3sas_base.c
@@ -6008,11 +6008,12 @@ _base_handshake_req_reply_wait(struct MPT3SAS_ADAPTER *ioc, int request_bytes,
int i;
u8 failed;
__le32 *mfp;
+ int ret_val;

/* make sure doorbell is not in use */
if ((ioc->base_readl_ext_retry(&ioc->chip->Doorbell) & MPI2_DOORBELL_USED)) {
ioc_err(ioc, "doorbell is in use (line=%d)\n", __LINE__);
- return -EFAULT;
+ goto doorbell_diag_reset;
}

/* clear pending doorbell interrupts from previous state changes */
@@ -6102,6 +6103,10 @@ _base_handshake_req_reply_wait(struct MPT3SAS_ADAPTER *ioc, int request_bytes,
le32_to_cpu(mfp[i]));
}
return 0;
+
+doorbell_diag_reset:
+ ret_val = _base_diag_reset(ioc);
+ return ret_val;
}

/**
--
2.43.0