diff options
| author | Tudor Ambarus <tudor.ambarus@microchip.com> | 2020-01-23 14:03:09 +0000 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2020-02-25 11:27:27 +0530 |
| commit | 247b4d83d6525d04278333cf201d6e3b066c9ca5 (patch) | |
| tree | 7f6d3e7ae9ef4eecbc2f723a63b437df714b71bb /drivers/dma/at_hdmac.c | |
| parent | ceb2c14c5908565ac49f9b6a5c0d9e93f2099ea0 (diff) | |
| download | linux-247b4d83d6525d04278333cf201d6e3b066c9ca5.tar.bz2 | |
dmaengine: at_hdmac: Switch atomic allocations to GFP_NOWAIT
Avoids sleeping without depleting the emergency pool.
The rationale being that in most cases a dma device is either
offloading an operation that will automatically fallback to
software when the descriptor allocation fails, or we can simply poll
and wait for the dma device to release some in use descriptors.
Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Acked-by: Ludovic Desroches <ludovic.desroches@microchip.com>
Link: https://lore.kernel.org/r/20200123140237.125799-5-tudor.ambarus@microchip.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'drivers/dma/at_hdmac.c')
| -rw-r--r-- | drivers/dma/at_hdmac.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/dma/at_hdmac.c b/drivers/dma/at_hdmac.c index 44d998bc894b..8e8e04bd1b28 100644 --- a/drivers/dma/at_hdmac.c +++ b/drivers/dma/at_hdmac.c @@ -147,7 +147,7 @@ static struct at_desc *atc_desc_get(struct at_dma_chan *atchan) /* no more descriptor available in initial pool: create one more */ if (!ret) - ret = atc_alloc_descriptor(&atchan->chan_common, GFP_ATOMIC); + ret = atc_alloc_descriptor(&atchan->chan_common, GFP_NOWAIT); return ret; } @@ -931,7 +931,7 @@ atc_prep_dma_memset(struct dma_chan *chan, dma_addr_t dest, int value, return NULL; } - vaddr = dma_pool_alloc(atdma->memset_pool, GFP_ATOMIC, &paddr); + vaddr = dma_pool_alloc(atdma->memset_pool, GFP_NOWAIT, &paddr); if (!vaddr) { dev_err(chan2dev(chan), "%s: couldn't allocate buffer\n", __func__); @@ -989,7 +989,7 @@ atc_prep_dma_memset_sg(struct dma_chan *chan, return NULL; } - vaddr = dma_pool_alloc(atdma->memset_pool, GFP_ATOMIC, &paddr); + vaddr = dma_pool_alloc(atdma->memset_pool, GFP_NOWAIT, &paddr); if (!vaddr) { dev_err(chan2dev(chan), "%s: couldn't allocate buffer\n", __func__); |