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    Subject[PATCH 5.12 682/700] scsi: megaraid_sas: Send all non-RW I/Os for TYPE_ENCLOSURE device through firmware
    Date
    From: Chandrakanth Patil <chandrakanth.patil@broadcom.com>

    commit 79db830162b733f5f3ee80f0673eeeb0245fe38b upstream.

    The driver issues all non-ReadWrite I/Os for TYPE_ENCLOSURE devices through
    the fast path with invalid dev handle. Fast path in turn directs all the
    I/Os to the firmware. As firmware stopped handling those I/Os from SAS3.5
    generation of controllers (Ventura generation and onwards) this will lead
    to I/O failures.

    Switch the driver to issue all the non-ReadWrite I/Os for TYPE_ENCLOSURE
    devices directly to firmware for SAS3.5 generation of controllers and
    later.

    Link: https://lore.kernel.org/r/20210528131307.25683-2-chandrakanth.patil@broadcom.com
    Cc: <stable@vger.kernel.org> # v5.11+
    Signed-off-by: Chandrakanth Patil <chandrakanth.patil@broadcom.com>
    Signed-off-by: Sumit Saxena <sumit.saxena@broadcom.com>
    Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

    ---
    drivers/scsi/megaraid/megaraid_sas_fusion.c | 10 ++++++++--
    1 file changed, 8 insertions(+), 2 deletions(-)

    --- a/drivers/scsi/megaraid/megaraid_sas_fusion.c
    +++ b/drivers/scsi/megaraid/megaraid_sas_fusion.c
    @@ -3167,6 +3167,8 @@ megasas_build_io_fusion(struct megasas_i
    {
    int sge_count;
    u8 cmd_type;
    + u16 pd_index = 0;
    + u8 drive_type = 0;
    struct MPI2_RAID_SCSI_IO_REQUEST *io_request = cmd->io_request;
    struct MR_PRIV_DEVICE *mr_device_priv_data;
    mr_device_priv_data = scp->device->hostdata;
    @@ -3201,8 +3203,12 @@ megasas_build_io_fusion(struct megasas_i
    megasas_build_syspd_fusion(instance, scp, cmd, true);
    break;
    case NON_READ_WRITE_SYSPDIO:
    - if (instance->secure_jbod_support ||
    - mr_device_priv_data->is_tm_capable)
    + pd_index = MEGASAS_PD_INDEX(scp);
    + drive_type = instance->pd_list[pd_index].driveType;
    + if ((instance->secure_jbod_support ||
    + mr_device_priv_data->is_tm_capable) ||
    + (instance->adapter_type >= VENTURA_SERIES &&
    + drive_type == TYPE_ENCLOSURE))
    megasas_build_syspd_fusion(instance, scp, cmd, false);
    else
    megasas_build_syspd_fusion(instance, scp, cmd, true);

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