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| author | Brian Norris <computersforpeace@gmail.com> | 2014-07-20 23:59:16 -0700 |
|---|---|---|
| committer | Brian Norris <computersforpeace@gmail.com> | 2014-07-21 00:01:16 -0700 |
| commit | d0d5864676dbccfb1337864a0ae6ce97e6342678 (patch) | |
| tree | 7caa674ec05a1797054cd4304f0a047b6dacddd6 /drivers/dma/cppi41.c | |
| parent | 6534e6809e6c9d48114b537afe03bee3fd33bf01 (diff) | |
| parent | 9a3c4145af32125c5ee39c0272662b47307a8323 (diff) | |
| download | op-kernel-dev-d0d5864676dbccfb1337864a0ae6ce97e6342678.zip op-kernel-dev-d0d5864676dbccfb1337864a0ae6ce97e6342678.tar.gz | |
Merge tag 'v3.16-rc6' into MTD development branch
Linux 3.16-rc6
Diffstat (limited to 'drivers/dma/cppi41.c')
| -rw-r--r-- | drivers/dma/cppi41.c | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/drivers/dma/cppi41.c b/drivers/dma/cppi41.c index d028f36..8f8b0b6 100644 --- a/drivers/dma/cppi41.c +++ b/drivers/dma/cppi41.c @@ -86,6 +86,9 @@ #define USBSS_IRQ_PD_COMP (1 << 2) +/* Packet Descriptor */ +#define PD2_ZERO_LENGTH (1 << 19) + struct cppi41_channel { struct dma_chan chan; struct dma_async_tx_descriptor txd; @@ -307,7 +310,7 @@ static irqreturn_t cppi41_irq(int irq, void *data) __iormb(); while (val) { - u32 desc; + u32 desc, len; q_num = __fls(val); val &= ~(1 << q_num); @@ -319,9 +322,13 @@ static irqreturn_t cppi41_irq(int irq, void *data) q_num, desc); continue; } - c->residue = pd_trans_len(c->desc->pd6) - - pd_trans_len(c->desc->pd0); + if (c->desc->pd2 & PD2_ZERO_LENGTH) + len = 0; + else + len = pd_trans_len(c->desc->pd0); + + c->residue = pd_trans_len(c->desc->pd6) - len; dma_cookie_complete(&c->txd); c->txd.callback(c->txd.callback_param); } |
