dmaengine: at_hdmac: fix memory leak in at_dma_xlate()
commit 98f5f932 upstream. The leak was found when opening/closing a serial port a great number of time, increasing kmalloc-32 in slabinfo. Each time the port was opened, dma_request_slave_channel() was called. Then, in at_dma_xlate(), atslave was allocated with devm_kzalloc() and never freed. (Well, it was free at module unload, but that's not what we want). So, here, kzalloc is more suited for the job since it has to be freed in atc_free_chan_resources(). Cc: stable@vger.kernel.org Fixes: bbe89c8e ("at_hdmac: move to generic DMA binding") Reported-by: NMario Forner <m.forner@be4energy.com> Suggested-by: NAlexandre Belloni <alexandre.belloni@bootlin.com> Acked-by: NAlexandre Belloni <alexandre.belloni@bootlin.com> Acked-by: NLudovic Desroches <ludovic.desroches@microchip.com> Signed-off-by: NRichard Genoud <richard.genoud@gmail.com> Signed-off-by: NVinod Koul <vkoul@kernel.org> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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