[PATCH v4 4/5] spi: dw: restore previous irq handling behavior when !ctlr->cur_msg

[Jisheng Zhang <jszhang@kernel.org>]

Recent "enhanced" support changes the dw_spi_irq() behavior a bit
when !!ctlr->cur_msg:

    if (!ctlr->cur_msg && dws->transfer_handler == dw_spi_transfer_handler) {
            dw_spi_mask_intr(dws, 0xff);
            return IRQ_HANDLED;
    }

But it misses the dma case, where the transfer_handler ==
dw_spi_dma_transfer_handler, so this changes the previous long time
working behavior, let's restore the previous handling by only filtering
out the dw_spi_enh_handler.

Signed-off-by: Jisheng Zhang <jszhang@kernel.org>
---
 drivers/spi/spi-dw-core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/spi/spi-dw-core.c b/drivers/spi/spi-dw-core.c
index 91de357f97f3..da7d4872e513 100644
--- a/drivers/spi/spi-dw-core.c
+++ b/drivers/spi/spi-dw-core.c
@@ -280,7 +280,7 @@ static irqreturn_t dw_spi_irq(int irq, void *dev_id)
 	if (!irq_status)
 		return IRQ_NONE;
 
-	if (!ctlr->cur_msg && dws->transfer_handler == dw_spi_transfer_handler) {
+	if (!ctlr->cur_msg && dws->transfer_handler != dw_spi_enh_handler) {
 		dw_spi_mask_intr(dws, 0xff);
 		return IRQ_HANDLED;
 	}
-- 
2.53.0