[PATCH] dmaengine: Add NULL check in lpc32xx_dmamux_reserve()

[Vladimir Zapolskiy]

Hi Charles,

On 6/16/25 13:46, Charles Han wrote:
> The function of_find_device_by_node() may return NULL if the device
> node cannot be found or if CONFIG_OF is not defined, dereferencing

please see my comments provided for lpc18xx-dmamux.c driver, all of
them are applicable here as well.

There is no problem to be fixed, the change also shall be dropped
in my opinion.

> it without NULL check may lead to NULL dereference.
> Add a check to verify whether the return value is NULL.
> 
> Fixes: 5d318b595982 ("dmaengine: Add dma router for pl08x in LPC32XX SoC")
> Signed-off-by: Charles Han <hanchunchao at inspur.com>

--
Best wishes,
Vladimir