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Subject[RFC patch] DMAengine/Langwell: put tx descriptor in error path
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When preparing LLI based periphral transfer, if error encountered, the newly
prepared tx descriptor should be put for later recycling.

Signed-off-by: Hillf Danton <dhillf@gmail.com>
---
drivers/dma/intel_mid_dma.c | 2 ++
1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/drivers/dma/intel_mid_dma.c b/drivers/dma/intel_mid_dma.c
index f653517..b78a65a 100644
--- a/drivers/dma/intel_mid_dma.c
+++ b/drivers/dma/intel_mid_dma.c
@@ -793,6 +793,7 @@ static struct dma_async_tx_descriptor
*intel_mid_dma_prep_slave_sg(
32, 0);
if (NULL == desc->lli_pool) {
pr_err("MID_DMA:LLI pool create failed\n");
+ midc_desc_put(midc, desc);
return NULL;
}

@@ -800,6 +801,7 @@ static struct dma_async_tx_descriptor
*intel_mid_dma_prep_slave_sg(
if (!desc->lli) {
pr_err("MID_DMA: LLI alloc failed\n");
pci_pool_destroy(desc->lli_pool);
+ midc_desc_put(midc, desc);
return NULL;
}

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