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    Subject[PATCH 4.19 467/639] fsi: sbefifo: Dont fail operations when in SBE IPL state
    Date
    From: Eddie James <eajames@linux.ibm.com>

    [ Upstream commit 7ce98fb6c53d2311b3e9faae90b1a9c1a96534db ]

    SBE fifo operations should be allowed while the SBE is in any of the
    "IPL" states. Operations should succeed in this state.

    Fixes: 9f4a8a2d7f9d fsi/sbefifo: Add driver for the SBE FIFO
    Reviewed-by: Joel Stanley <joel@jms.id.au>
    Tested-by: Alistair Popple <alistair@popple.id.au>
    Signed-off-by: Eddie James <eajames@linux.ibm.com>
    Link: https://lore.kernel.org/r/1561575415-3282-1-git-send-email-eajames@linux.ibm.com
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
    Signed-off-by: Sasha Levin <sashal@kernel.org>
    ---
    drivers/fsi/fsi-sbefifo.c | 4 ++--
    1 file changed, 2 insertions(+), 2 deletions(-)

    diff --git a/drivers/fsi/fsi-sbefifo.c b/drivers/fsi/fsi-sbefifo.c
    index ae861342626e3..9fa3959e08554 100644
    --- a/drivers/fsi/fsi-sbefifo.c
    +++ b/drivers/fsi/fsi-sbefifo.c
    @@ -289,11 +289,11 @@ static int sbefifo_check_sbe_state(struct sbefifo *sbefifo)
    switch ((sbm & CFAM_SBM_SBE_STATE_MASK) >> CFAM_SBM_SBE_STATE_SHIFT) {
    case SBE_STATE_UNKNOWN:
    return -ESHUTDOWN;
    + case SBE_STATE_DMT:
    + return -EBUSY;
    case SBE_STATE_IPLING:
    case SBE_STATE_ISTEP:
    case SBE_STATE_MPIPL:
    - case SBE_STATE_DMT:
    - return -EBUSY;
    case SBE_STATE_RUNTIME:
    case SBE_STATE_DUMP: /* Not sure about that one */
    break;
    --
    2.20.1


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