diff options
| author | Joel Fernandes <joelf@ti.com> | 2014-04-17 00:58:33 -0500 |
|---|---|---|
| committer | Vinod Koul <vinod.koul@intel.com> | 2014-04-23 11:21:17 +0530 |
| commit | 406efb1a745c1dc512dc9c3c859e302e7b7f907e (patch) | |
| tree | e209379f0e4ae06f2332085c2d59a97201e7bfcd /drivers | |
| parent | 8cc3e30bea9a90f9ab7a1bc4612792c40ad7ae95 (diff) | |
| download | linux-406efb1a745c1dc512dc9c3c859e302e7b7f907e.tar.bz2 | |
dmaengine: edma: No need save/restore interrupt flags during spin_lock in IRQ
The vchan lock in edma_callback is acquired in hard interrupt context. As
interrupts are already disabled, there's no point in save/restoring interrupt
mask bit or cpsr flags.
Get rid of flags local variable and use spin_lock instead of spin_lock_irqsave.
Signed-off-by: Joel Fernandes <joelf@ti.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/dma/edma.c | 9 |
1 files changed, 4 insertions, 5 deletions
diff --git a/drivers/dma/edma.c b/drivers/dma/edma.c index 43f56a7d9d61..fa87fd52b0ad 100644 --- a/drivers/dma/edma.c +++ b/drivers/dma/edma.c @@ -682,7 +682,6 @@ static void edma_callback(unsigned ch_num, u16 ch_status, void *data) struct edma_chan *echan = data; struct device *dev = echan->vchan.chan.device->dev; struct edma_desc *edesc; - unsigned long flags; struct edmacc_param p; edesc = echan->edesc; @@ -693,7 +692,7 @@ static void edma_callback(unsigned ch_num, u16 ch_status, void *data) switch (ch_status) { case EDMA_DMA_COMPLETE: - spin_lock_irqsave(&echan->vchan.lock, flags); + spin_lock(&echan->vchan.lock); if (edesc) { if (edesc->cyclic) { @@ -709,11 +708,11 @@ static void edma_callback(unsigned ch_num, u16 ch_status, void *data) } } - spin_unlock_irqrestore(&echan->vchan.lock, flags); + spin_unlock(&echan->vchan.lock); break; case EDMA_DMA_CC_ERROR: - spin_lock_irqsave(&echan->vchan.lock, flags); + spin_lock(&echan->vchan.lock); edma_read_slot(EDMA_CHAN_SLOT(echan->slot[0]), &p); @@ -744,7 +743,7 @@ static void edma_callback(unsigned ch_num, u16 ch_status, void *data) edma_trigger_channel(echan->ch_num); } - spin_unlock_irqrestore(&echan->vchan.lock, flags); + spin_unlock(&echan->vchan.lock); break; default: |