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    Subject[PATCH 4.17 281/336] scsi: megaraid_sas: Increase timeout by 1 sec for non-RAID fastpath IOs
    Date
    4.17-stable review patch.  If anyone has any objections, please let me know.

    ------------------

    From: Shivasharan S <shivasharan.srikanteshwara@broadcom.com>

    [ Upstream commit 3239b8cd28fd849a2023483257d35d68c5876c74 ]

    Hardware could time out Fastpath IOs one second earlier than the timeout
    provided by the host.

    For non-RAID devices, driver provides timeout value based on OS provided
    timeout value. Under certain scenarios, if the OS provides a timeout
    value of 1 second, due to above behavior hardware will timeout
    immediately.

    Increase timeout value for non-RAID fastpath IOs by 1 second.

    Signed-off-by: Shivasharan S <shivasharan.srikanteshwara@broadcom.com>
    Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
    Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
    ---
    drivers/scsi/megaraid/megaraid_sas_fusion.c | 3 +++
    1 file changed, 3 insertions(+)

    --- a/drivers/scsi/megaraid/megaraid_sas_fusion.c
    +++ b/drivers/scsi/megaraid/megaraid_sas_fusion.c
    @@ -2981,6 +2981,9 @@ megasas_build_syspd_fusion(struct megasa
    pRAID_Context->timeout_value = cpu_to_le16(os_timeout_value);
    pRAID_Context->virtual_disk_tgt_id = cpu_to_le16(device_id);
    } else {
    + if (os_timeout_value)
    + os_timeout_value++;
    +
    /* system pd Fast Path */
    io_request->Function = MPI2_FUNCTION_SCSI_IO_REQUEST;
    timeout_limit = (scmd->device->type == TYPE_DISK) ?

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