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dmaengine: Use negative condition for better readability 

When negative condition is in use we may decrease indentation level
and make the main part of logic better visible.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Link: https://lore.kernel.org/r/20200226101842.29426-2-andriy.shevchenko@linux.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Andy Shevchenko 2020-02-26 12:18:39 +02:00 committed by Vinod Koul
parent 88ac039cbe
commit 3a92063be1
1 changed files with 18 additions and 17 deletions
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35
include/linux/dmaengine.h
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@ -618,10 +618,11 @@ static inline void dmaengine_unmap_put(struct dmaengine_unmap_data *unmap)
static inline void dma_descriptor_unmap(struct dma_async_tx_descriptor *tx)
{
if (tx->unmap) {
dmaengine_unmap_put(tx->unmap);
tx->unmap = NULL;
}
if (!tx->unmap)
return;
dmaengine_unmap_put(tx->unmap);
tx->unmap = NULL;
}
#ifndef CONFIG_ASYNC_TX_ENABLE_CHANNEL_SWITCH
@ -1408,11 +1409,12 @@ static inline enum dma_status dma_async_is_complete(dma_cookie_t cookie,
static inline void
dma_set_tx_state(struct dma_tx_state *st, dma_cookie_t last, dma_cookie_t used, u32 residue)
{
if (st) {
st->last = last;
st->used = used;
st->residue = residue;
}
if (!st)
return;
st->last = last;
st->used = used;
st->residue = residue;
}
#ifdef CONFIG_DMA_ENGINE
@ -1489,12 +1491,11 @@ static inline int dmaengine_desc_set_reuse(struct dma_async_tx_descriptor *tx)
if (ret)
return ret;
if (caps.descriptor_reuse) {
tx->flags |= DMA_CTRL_REUSE;
return 0;
} else {
if (!caps.descriptor_reuse)
return -EPERM;
}
tx->flags |= DMA_CTRL_REUSE;
return 0;
}
static inline void dmaengine_desc_clear_reuse(struct dma_async_tx_descriptor *tx)
@ -1510,10 +1511,10 @@ static inline bool dmaengine_desc_test_reuse(struct dma_async_tx_descriptor *tx)
static inline int dmaengine_desc_free(struct dma_async_tx_descriptor *desc)
{
/* this is supported for reusable desc, so check that */
if (dmaengine_desc_test_reuse(desc))
return desc->desc_free(desc);
else
if (!dmaengine_desc_test_reuse(desc))
return -EPERM;
return desc->desc_free(desc);
}
/* --- DMA device --- */