[PATCH v2 1/3] drm: dw_hdmi: use of_get_i2c_adapter_by_node interface

[Vladimir Zapolskiy]

David, Russel,

ping.

On 23.09.2015 00:48, Vladimir Zapolskiy wrote:
> This change is needed to properly lock I2C bus driver, which serves DDC.
> 
> The change fixes an overflow over zero of I2C bus driver user counter:
> 
>     root at mx6q:~# lsmod | grep i2c
>     i2c_imx                15348  0
>     root at mx6q:~# lsmod | grep dw_hdmi_imx
>     dw_hdmi_imx             3567  0
>     dw_hdmi                15850  1 dw_hdmi_imx
>     imxdrm                  8610  3 dw_hdmi_imx,imx_ipuv3_crtc,imx_ldb
>     root at mx6q:~# rmmod dw_hdmi_imx
>     root at mx6q:~# lsmod | grep i2c
>     i2c_imx                15348  -1
> 
>                                  ^^^^^
> 
>     root at mx6q:~# rmmod i2c_imx
>     rmmod: ERROR: Module i2c_imx is in use
> 
> Note that prior to this change put_device() coupled with
> of_find_i2c_adapter_by_node() was missing on error path of
> dw_hdmi_bind(), added i2c_put_adapter() there along with the change.
> 
> Signed-off-by: Vladimir Zapolskiy <vladimir_zapolskiy at mentor.com>
> Cc: Russell King <rmk+kernel at arm.linux.org.uk>
> Cc: Philipp Zabel <p.zabel at pengutronix.de>
> Cc: Andy Yan <andy.yan at rock-chips.com>

--
With best wishes,
Vladimir