[PATCH] drm/sun4i: fix refcount leak in sun4i_backend_init_sat()

[Jernej Škrabec]

Dne nedelja, 7. junij 2026 ob 05:09:50 Srednjeevropski poletni čas je Wentao Liang napisal(a):
> When sun4i_backend_init_sat() calls reset_control_deassert() it
> increments the deassert_count of the reset controller, and must
> pair that with a reset_control_assert() call to decrement it.
> In the error path where clk_prepare_enable() fails, the function
> returns immediately without calling reset_control_assert(), leaking
> the reference count.  Other error paths, like the devm_clk_get()
> failure, correctly jump to the err_assert_reset label which performs
> the missing assert.
> 
> Fix the leak by using the existing err_assert_reset label in the
> clk_prepare_enable error path instead of returning directly.
> 
> Cc: stable at vger.kernel.org
> Fixes: 440d2c7b127a ("drm/sun4i: backend: Handle the SAT")
> Signed-off-by: Wentao Liang <vulab at iscas.ac.cn>

Reviewed-by: Jernej Skrabec <jernej.skrabec at gmail.com>

Best regards,
Jernej