[PATCH 5.8 125/633] spi: fsi: Handle 9 to 15 byte transfers lengths

[Greg Kroah-Hartman]

From: Brad Bishop <bradl...@fuzziesquirrel.com>

[ Upstream commit 2b3cef0fc757bd06ed9b83bd4c436bfa55f47370 ]

The trailing <len> - 8 bytes of transfer data in this size range is no
longer ignored.

Fixes: bbb6b2f9865b ("spi: Add FSI-attached SPI controller driver")
Signed-off-by: Brad Bishop <bradl...@fuzziesquirrel.com>
Signed-off-by: Eddie James <eaja...@linux.ibm.com>
Reviewed-by: Joel Stanley <j...@jms.id.au>
Signed-off-by: Joel Stanley <j...@jms.id.au>
Link: https://lore.kernel.org/r/20200909222857.28653-2-eaja...@linux.ibm.com
Signed-off-by: Mark Brown <broo...@kernel.org>
Signed-off-by: Sasha Levin <sas...@kernel.org>
---
 drivers/spi/spi-fsi.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/spi/spi-fsi.c b/drivers/spi/spi-fsi.c
index 37a3e0f8e7526..8f64af0140e09 100644
--- a/drivers/spi/spi-fsi.c
+++ b/drivers/spi/spi-fsi.c
@@ -258,15 +258,15 @@ static int fsi_spi_sequence_transfer(struct fsi_spi *ctx,
        if (loops > 1) {
                fsi_spi_sequence_add(seq, SPI_FSI_SEQUENCE_BRANCH(idx));
 
-               if (rem)
-                       fsi_spi_sequence_add(seq, rem);
-
                rc = fsi_spi_write_reg(ctx, SPI_FSI_COUNTER_CFG,
                                       SPI_FSI_COUNTER_CFG_LOOPS(loops - 1));
                if (rc)
                        return rc;
        }
 
+       if (rem)
+               fsi_spi_sequence_add(seq, rem);
+
        return 0;
 }
 
-- 
2.25.1