i2c-cpm: Detect and report NAK right away instead of timing out

[linux-2.6-omap-h63xx.git] / drivers / i2c / busses / i2c-cpm.c

diff --git a/drivers/i2c/busses/i2c-cpm.c b/drivers/i2c/busses/i2c-cpm.c
index 228f75723063968c4e77fbb374e5421e5c87e393..3fcf78e906db185187d10c87466786fb3c3280c2 100644 (file)
--- a/drivers/i2c/busses/i2c-cpm.c
+++ b/drivers/i2c/busses/i2c-cpm.c
@@ -365,6 +365,7 @@ static int cpm_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg *msgs, int num)
                pmsg = &msgs[tptr];
                if (pmsg->flags & I2C_M_RD)
                        ret = wait_event_interruptible_timeout(cpm->i2c_wait,
+                               (in_be16(&tbdf[tptr].cbd_sc) & BD_SC_NAK) ||
                                !(in_be16(&rbdf[rptr].cbd_sc) & BD_SC_EMPTY),
                                1 * HZ);
                else