iio: adc: ti_am335x_adc: Fix return value check of tiadc_request_dma()
commit 60576e84 upstream. Fix wrong handling of a DMA request where the probing only failed if -EPROPE_DEFER was returned. Instead, let us fail if a non -ENODEV value is returned. This makes DMAs explicitly optional. Even if the DMA request is unsuccessfully, the ADC can still work properly. We do also handle the defer probe case by making use of dev_err_probe(). Fixes: f438b9da ("drivers: iio: ti_am335x_adc: add dma support") Signed-off-by:Wadim Egorov <w.egorov@phytec.de> Reviewed-by:
Bhavya Kapoor <b-kapoor@ti.com> Link: https://lore.kernel.org/r/20230925134427.214556-1-w.egorov@phytec.de Cc: <Stable@vger.kernel.org> Signed-off-by:
Jonathan Cameron <Jonathan.Cameron@huawei.com> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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45af72f1
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