[PATCH 04/14] [media] st_rc: simplify optional reset handling

[Philipp Zabel]

As of commit bb475230b8e5 ("reset: make optional functions really
optional"), the reset framework API calls use NULL pointers to describe
optional, non-present reset controls.

This allows to return errors from reset_control_get_optional and to call
reset_control_(de)assert unconditionally.

Signed-off-by: Philipp Zabel <p.za...@pengutronix.de>
Cc: Patrice Chotard <patrice.chot...@st.com>
Cc: Mauro Carvalho Chehab <mche...@kernel.org>
---
 drivers/media/rc/st_rc.c | 13 ++++++-------
 1 file changed, 6 insertions(+), 7 deletions(-)

diff --git a/drivers/media/rc/st_rc.c b/drivers/media/rc/st_rc.c
index 1fa0c9d1c5083..04e694b707b45 100644
--- a/drivers/media/rc/st_rc.c
+++ b/drivers/media/rc/st_rc.c
@@ -165,8 +165,7 @@ static void st_rc_hardware_init(struct st_rc_device *dev)
        unsigned int rx_sampling_freq_div;
 
        /* Enable the IP */
-       if (dev->rstc)
-               reset_control_deassert(dev->rstc);
+       reset_control_deassert(dev->rstc);
 
        clk_prepare_enable(dev->sys_clock);
        baseclock = clk_get_rate(dev->sys_clock);
@@ -281,10 +280,11 @@ static int st_rc_probe(struct platform_device *pdev)
        else
                rc_dev->rx_base = rc_dev->base;
 
-
        rc_dev->rstc = reset_control_get_optional(dev, NULL);
-       if (IS_ERR(rc_dev->rstc))
-               rc_dev->rstc = NULL;
+       if (IS_ERR(rc_dev->rstc)) {
+               ret = PTR_ERR(rc_dev->rstc);
+               goto err;
+       }
 
        rc_dev->dev = dev;
        platform_set_drvdata(pdev, rc_dev);
@@ -353,8 +353,7 @@ static int st_rc_suspend(struct device *dev)
                writel(0x00, rc_dev->rx_base + IRB_RX_EN);
                writel(0x00, rc_dev->rx_base + IRB_RX_INT_EN);
                clk_disable_unprepare(rc_dev->sys_clock);
-               if (rc_dev->rstc)
-                       reset_control_assert(rc_dev->rstc);
+               reset_control_assert(rc_dev->rstc);
        }
 
        return 0;
-- 
2.11.0