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bnxt_re: Stop issuing further cmds to FW once a cmd times out 

Once a cmd to FW times out(after 20s) it is reasonable to
assume the FW or atleast the control path is dead.
No point issuing further cmds to the FW as each subsequent cmd
with another 20s timeout will cascade resulting in unnecessary
traces and/or NMI Lockups.

Signed-off-by: Somnath Kotur <somnath.kotur@broadcom.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Somnath Kotur 2017-08-31 09:27:29 +05:30 committed by Doug Ledford
parent f9b941baa4
commit 2b6376305d
2 changed files with 6 additions and 1 deletions
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4
drivers/infiniband/hw/bnxt_re/qplib_rcfw.c
View File

@ -107,6 +107,9 @@ static int __send_message(struct bnxt_qplib_rcfw *rcfw, struct cmdq_base *req,
return -EINVAL;
}
if (test_bit(FIRMWARE_TIMED_OUT, &rcfw->flags))
return -ETIMEDOUT;
/* Cmdq are in 16-byte units, each request can consume 1 or more
* cmdqe
*/
@ -226,6 +229,7 @@ int bnxt_qplib_rcfw_send_message(struct bnxt_qplib_rcfw *rcfw,
/* timed out */
dev_err(&rcfw->pdev->dev, "QPLIB: cmdq[%#x]=%#x timedout (%d)msec",
cookie, opcode, RCFW_CMD_WAIT_TIME_MS);
set_bit(FIRMWARE_TIMED_OUT, &rcfw->flags);
return rc;
}

3
drivers/infiniband/hw/bnxt_re/qplib_rcfw.h
View File

@ -162,8 +162,9 @@ struct bnxt_qplib_rcfw {
unsigned long *cmdq_bitmap;
u32 bmap_size;
unsigned long flags;
#define FIRMWARE_INITIALIZED_FLAG 1
#define FIRMWARE_INITIALIZED_FLAG BIT(0)
#define FIRMWARE_FIRST_FLAG BIT(31)
#define FIRMWARE_TIMED_OUT BIT(3)
wait_queue_head_t waitq;
int (*aeq_handler)(struct bnxt_qplib_rcfw *,
struct creq_func_event *);