From: Tudor Ambarus tudor.ambarus@microchip.com
commit 6ba826cbb57d675f447b59323204d1473bbd5593 upstream.
There's no need to hold the channel lock when freeing the memset buf, as the operation has already completed. Free the memset buf without holding the channel lock.
Fixes: 4d112426c344 ("dmaengine: hdmac: Add memset capabilities") Signed-off-by: Tudor Ambarus tudor.ambarus@microchip.com Cc: stable@vger.kernel.org Acked-by: Nicolas Ferre nicolas.ferre@microchip.com Link: https://lore.kernel.org/r/20221025090306.297886-1-tudor.ambarus@microchip.co... Link: https://lore.kernel.org/r/20221025090306.297886-10-tudor.ambarus@microchip.c... Signed-off-by: Vinod Koul vkoul@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/dma/at_hdmac.c | 14 +++++++------- 1 file changed, 7 insertions(+), 7 deletions(-)
--- a/drivers/dma/at_hdmac.c +++ b/drivers/dma/at_hdmac.c @@ -443,13 +443,6 @@ atc_chain_complete(struct at_dma_chan *a if (!atc_chan_is_cyclic(atchan)) dma_cookie_complete(txd);
- /* If the transfer was a memset, free our temporary buffer */ - if (desc->memset_buffer) { - dma_pool_free(atdma->memset_pool, desc->memset_vaddr, - desc->memset_paddr); - desc->memset_buffer = false; - } - /* Remove transfer node from the active list. */ list_del_init(&desc->desc_node); spin_unlock_irqrestore(&atchan->lock, flags); @@ -468,6 +461,13 @@ atc_chain_complete(struct at_dma_chan *a /* add myself to free_list */ list_add(&desc->desc_node, &atchan->free_list); spin_unlock_irqrestore(&atchan->lock, flags); + + /* If the transfer was a memset, free our temporary buffer */ + if (desc->memset_buffer) { + dma_pool_free(atdma->memset_pool, desc->memset_vaddr, + desc->memset_paddr); + desc->memset_buffer = false; + } }
/**