Hello,
I have taken another look at the implementation of the function “mcde_probe”. A software analysis approach points the following source code out for further development considerations. https://elixir.bootlin.com/linux/v5.6.2/source/drivers/gpu/drm/mcde/mcde_drv... https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/driv...
irq = platform_get_irq(pdev, 0); if (!irq) { ret = -EINVAL; goto clk_disable; }
The software documentation is providing the following information for the used programming interface. https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/driv... https://elixir.bootlin.com/linux/v5.6.2/source/drivers/base/platform.c#L202
“… * Return: IRQ number on success, negative error number on failure. …”
Would you like to reconsider the shown condition check?
Regards, Markus