diff options
author | David S. Miller <davem@davemloft.net> | 2019-11-02 13:12:51 -0700 |
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committer | David S. Miller <davem@davemloft.net> | 2019-11-02 13:54:56 -0700 |
commit | d31e95585ca697fb31440c6fe30113adc85ecfbd (patch) | |
tree | 4936ea0aaa6b2aeeee4db51e3c60d938c9b9ed96 /drivers/dma/ti/cppi41.c | |
parent | tc-testing: added tests with cookie for conntrack TC action (diff) | |
parent | Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net (diff) | |
download | linux-dev-d31e95585ca697fb31440c6fe30113adc85ecfbd.tar.xz linux-dev-d31e95585ca697fb31440c6fe30113adc85ecfbd.zip |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
The only slightly tricky merge conflict was the netdevsim because the
mutex locking fix overlapped a lot of driver reload reorganization.
The rest were (relatively) trivial in nature.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/dma/ti/cppi41.c')
-rw-r--r-- | drivers/dma/ti/cppi41.c | 21 |
1 files changed, 20 insertions, 1 deletions
diff --git a/drivers/dma/ti/cppi41.c b/drivers/dma/ti/cppi41.c index 2f946f55076c..8c2f7ebe998c 100644 --- a/drivers/dma/ti/cppi41.c +++ b/drivers/dma/ti/cppi41.c @@ -586,9 +586,22 @@ static struct dma_async_tx_descriptor *cppi41_dma_prep_slave_sg( enum dma_transfer_direction dir, unsigned long tx_flags, void *context) { struct cppi41_channel *c = to_cpp41_chan(chan); + struct dma_async_tx_descriptor *txd = NULL; + struct cppi41_dd *cdd = c->cdd; struct cppi41_desc *d; struct scatterlist *sg; unsigned int i; + int error; + + error = pm_runtime_get(cdd->ddev.dev); + if (error < 0) { + pm_runtime_put_noidle(cdd->ddev.dev); + + return NULL; + } + + if (cdd->is_suspended) + goto err_out_not_ready; d = c->desc; for_each_sg(sgl, sg, sg_len, i) { @@ -611,7 +624,13 @@ static struct dma_async_tx_descriptor *cppi41_dma_prep_slave_sg( d++; } - return &c->txd; + txd = &c->txd; + +err_out_not_ready: + pm_runtime_mark_last_busy(cdd->ddev.dev); + pm_runtime_put_autosuspend(cdd->ddev.dev); + + return txd; } static void cppi41_compute_td_desc(struct cppi41_desc *d) |