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Wolfram Sang authored
Early revisions of certain SoCs cannot do multiple DMA RX streams in parallel. To avoid data corruption, only allow one DMA RX channel and fall back to PIO, if needed. Signed-off-by:
Wolfram Sang <wsa+renesas@sang-engineering.com> Reviewed-by:
Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Tested-by:
Nguyen Viet Dung <dung.nguyen.aj@renesas.com> Reviewed-by:
Simon Horman <horms+renesas@verge.net.au> Cc: stable@vger.kernel.org Signed-off-by:
Ulf Hansson <ulf.hansson@linaro.org>
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