i2c: octeon: thunderx: Remove double-check after interrupt

Commit 1bb1ff3e7c74 ("i2c: octeon: Improve performance if interrupt is
early") added a double-check around the wait_event_timeout() condition.
The performance problem that this commit tried to work-around
could not be reproduced. It also makes the wait condition more
complicated then it should be. Therefore remove the double-check.

Signed-off-by: Jan Glauber <jglauber@cavium.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>

diff --git a/drivers/i2c/busses/i2c-octeon-core.c b/drivers/i2c/busses/i2c-octeon-core.c
index 0b02070..1d87757 100644 (file)
--- a/drivers/i2c/busses/i2c-octeon-core.c
+++ b/drivers/i2c/busses/i2c-octeon-core.c
@@ -36,24 +36,6 @@ static bool octeon_i2c_test_iflg(struct octeon_i2c *i2c)
        return (octeon_i2c_ctl_read(i2c) & TWSI_CTL_IFLG);
 }
 
-static bool octeon_i2c_test_ready(struct octeon_i2c *i2c, bool *first)
-{
-       if (octeon_i2c_test_iflg(i2c))
-               return true;
-
-       if (*first) {
-               *first = false;
-               return false;
-       }
-
-       /*
-        * IRQ has signaled an event but IFLG hasn't changed.
-        * Sleep and retry once.
-        */
-       usleep_range(I2C_OCTEON_EVENT_WAIT, 2 * I2C_OCTEON_EVENT_WAIT);
-       return octeon_i2c_test_iflg(i2c);
-}
-
 /**
  * octeon_i2c_wait - wait for the IFLG to be set
  * @i2c: The struct octeon_i2c
@@ -63,7 +45,6 @@ static bool octeon_i2c_test_ready(struct octeon_i2c *i2c, bool *first)
 static int octeon_i2c_wait(struct octeon_i2c *i2c)
 {
        long time_left;
-       bool first = true;
 
        /*
         * Some chip revisions don't assert the irq in the interrupt
@@ -80,7 +61,7 @@ static int octeon_i2c_wait(struct octeon_i2c *i2c)
        }
 
        i2c->int_enable(i2c);
-       time_left = wait_event_timeout(i2c->queue, octeon_i2c_test_ready(i2c, &first),
+       time_left = wait_event_timeout(i2c->queue, octeon_i2c_test_iflg(i2c),
                                       i2c->adap.timeout);
        i2c->int_disable(i2c);
 
@@ -102,25 +83,6 @@ static bool octeon_i2c_hlc_test_valid(struct octeon_i2c *i2c)
        return (__raw_readq(i2c->twsi_base + SW_TWSI(i2c)) & SW_TWSI_V) == 0;
 }
 
-static bool octeon_i2c_hlc_test_ready(struct octeon_i2c *i2c, bool *first)
-{
-       /* check if valid bit is cleared */
-       if (octeon_i2c_hlc_test_valid(i2c))
-               return true;
-
-       if (*first) {
-               *first = false;
-               return false;
-       }
-
-       /*
-        * IRQ has signaled an event but valid bit isn't cleared.
-        * Sleep and retry once.
-        */
-       usleep_range(I2C_OCTEON_EVENT_WAIT, 2 * I2C_OCTEON_EVENT_WAIT);
-       return octeon_i2c_hlc_test_valid(i2c);
-}
-
 static void octeon_i2c_hlc_int_clear(struct octeon_i2c *i2c)
 {
        /* clear ST/TS events, listen for neither */
@@ -176,7 +138,6 @@ static void octeon_i2c_hlc_disable(struct octeon_i2c *i2c)
  */
 static int octeon_i2c_hlc_wait(struct octeon_i2c *i2c)
 {
-       bool first = true;
        int time_left;
 
        /*
@@ -195,7 +156,7 @@ static int octeon_i2c_hlc_wait(struct octeon_i2c *i2c)
 
        i2c->hlc_int_enable(i2c);
        time_left = wait_event_timeout(i2c->queue,
-                                      octeon_i2c_hlc_test_ready(i2c, &first),
+                                      octeon_i2c_hlc_test_valid(i2c),
                                       i2c->adap.timeout);
        i2c->hlc_int_disable(i2c);
        if (!time_left)