diff options
| author |   Wolfram Sang <wsa+renesas@sang-engineering.com> | 2017-11-09 23:20:53 +0100 |
|---|---|---|
| committer |   Wolfram Sang <wsa@the-dreams.de> | 2017-11-27 18:53:23 +0100 |
| commit | 2967f9ca8b0dc8d924e0f14c55d1e73d9c6c4975 (patch) | |
| tree | 891e30dc943c7fd3e3d9c92119067869b1b4d2bf /drivers/i2c/busses | |
| parent | i2c: sh_mobile: let RuntimePM do the clock handling (diff) | |
| download | linux-dev-2967f9ca8b0dc8d924e0f14c55d1e73d9c6c4975.tar.xz linux-dev-2967f9ca8b0dc8d924e0f14c55d1e73d9c6c4975.zip | |
i2c: sh_mobile: avoid unnecessary register read
There is no data when the first WAIT interrupt arrives. No need to read
something then.
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Tested-by: Jacopo Mondi <jacopo+renesas@jmondi.org>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Diffstat (limited to 'drivers/i2c/busses')
| -rw-r--r-- | drivers/i2c/busses/i2c-sh_mobile.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/i2c/busses/i2c-sh_mobile.c b/drivers/i2c/busses/i2c-sh_mobile.c index 80561ffbcf7b..40a66d466c3c 100644 --- a/drivers/i2c/busses/i2c-sh_mobile.c +++ b/drivers/i2c/busses/i2c-sh_mobile.c @@ -433,8 +433,9 @@ static int sh_mobile_i2c_isr_rx(struct sh_mobile_i2c_data *pd) break; } data = i2c_op(pd, OP_RX_STOP_DATA, 0); - } else + } else if (real_pos >= 0) { data = i2c_op(pd, OP_RX, 0); + } if (real_pos >= 0) pd->msg->buf[real_pos] = data; |