From: Tudor Ambarus Date: Tue, 25 Oct 2022 09:02:46 +0000 (+0300) Subject: dmaengine: at_hdmac: Fix completion of unissued descriptor in case of errors X-Git-Tag: v6.1-rc5~18^2~3 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=ef2cb4f0ce479f77607b04c4b0414bf32f863ee8;p=platform%2Fkernel%2Flinux-starfive.git dmaengine: at_hdmac: Fix completion of unissued descriptor in case of errors In case the controller detected an error, the code took the chance to move all the queued (submitted) descriptors to the active (issued) list. This was wrong as if there were any descriptors in the submitted list they were moved to the issued list without actually issuing them to the controller, thus a completion could be raised without even fireing the descriptor. Fixes: dc78baa2b90b ("dmaengine: at_hdmac: new driver for the Atmel AHB DMA Controller") Reported-by: Peter Rosin Signed-off-by: Tudor Ambarus Cc: stable@vger.kernel.org Link: https://lore.kernel.org/lkml/13c6c9a2-6db5-c3bf-349b-4c127ad3496a@axentia.se/ Acked-by: Nicolas Ferre Link: https://lore.kernel.org/r/20221025090306.297886-1-tudor.ambarus@microchip.com Link: https://lore.kernel.org/r/20221025090306.297886-13-tudor.ambarus@microchip.com Signed-off-by: Vinod Koul --- diff --git a/drivers/dma/at_hdmac.c b/drivers/dma/at_hdmac.c index 9e5a303..80eeb4f 100644 --- a/drivers/dma/at_hdmac.c +++ b/drivers/dma/at_hdmac.c @@ -539,10 +539,6 @@ static void atc_handle_error(struct at_dma_chan *atchan) bad_desc = atc_first_active(atchan); list_del_init(&bad_desc->desc_node); - /* As we are stopped, take advantage to push queued descriptors - * in active_list */ - list_splice_init(&atchan->queue, atchan->active_list.prev); - /* Try to restart the controller */ if (!list_empty(&atchan->active_list)) { desc = atc_first_queued(atchan);