mpb27 / xilinx-dma Goto Github PK
View Code? Open in Web Editor NEWForking the Xilinx DMA driver to improve its capabilities.
Forking the Xilinx DMA driver to improve its capabilities.
We can use a spin_lock_bh in axis_reader.c if we can guarantee that the callback is never executed in an interrupt context. The proper locking between user context and a tasklet is a spin_lock_bh
.
Reference:
Rewrite the below lines to use spin_lock_irqsave
and spin_unlock_irqrestore
.
xilinx-dma/xilinx-dma-dr/xilinx_dma_dr.c
Lines 706 to 709 in fe65c9a
The IRQ handler might not be re-entrent but it is still probably a good idea to set the callback to NULL earlier, before re-enabling interrupts.
xilinx-dma/xilinx-dma-dr/xilinx_dma_dr.c
Lines 532 to 539 in fe65c9a
Tasklets are being removed and a work queue should be sufficient to proces the DMA completion callback.
Reference:
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