fsi: sbefifo: Don't fail operations when in SBE IPL state

[ 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>

diff --git a/drivers/fsi/fsi-sbefifo.c b/drivers/fsi/fsi-sbefifo.c
index ae861342626e3516527167b18d96a7f5ac522169..9fa3959e085542abae2e543a8492776a537da821 100644 (file)
--- 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;