i2c-bfin-twi: return completion in interrupt for smbus quick transfers

A smbus quick transfer has no data after the address byte.

Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>

1 files changed, 7 insertions, 11 deletions

diff --git a/drivers/i2c/busses/i2c-bfin-twi.c b/drivers/i2c/busses/i2c-bfin-twi.c
index dabfa80cf5f2..fb26e5c67515 100644
--- a/drivers/i2c/busses/i2c-bfin-twi.c
+++ b/drivers/i2c/busses/i2c-bfin-twi.c
@@ -159,18 +159,14 @@ static void bfin_twi_handle_interrupt(struct bfin_twi_iface *iface,
                 if (mast_stat & BUFWRERR)
                         dev_dbg(&iface->adap.dev, "Buffer Write Error\n");
 
-                /* if both err and complete int stats are set, return proper
-                 * results.
+                /* If it is a quick transfer, only address without data,
+                 * not an err, return 1.
                  */
-                if (twi_int_status & MCOMP) {
-                        /* If it is a quick transfer, only address without data,
-                         * not an err, return 1.
-                         * If address is acknowledged return 1.
-                         */
-                        if ((iface->writeNum == 0 && (mast_stat & BUFRDERR))
-                                || !(mast_stat & ANAK))
-                                iface->result = 1;
-                }
+                if (iface->cur_mode == TWI_I2C_MODE_STANDARD &&
+                        iface->transPtr == NULL &&
+                        (twi_int_status & MCOMP) && (mast_stat & DNAK))
+                        iface->result = 1;
+
                 complete(&iface->complete);
                 return;
         }