nickcheng wrote:
Hi,
I definitely agree it is in atomic context but why is the memory not for
DMA?
Would you please show me why?
It would probably be easier if you could explain where you believe the
memory IS used for DMA :)
Anyway, looking at ARCMSR_MESSAGE_READ_RQBUFFER
current code does this:
ver_addr = kmalloc(1032, GFP_ATOMIC);
Here are the cases when that buffer is used:
checking for successful malloc: not DMA
if (!ver_addr) {
copying the address: not DMA
ptmpQbuffer = ver_addr;
memcpying 1 byte into the buffer: not DMA
memcpy(ptmpQbuffer, pQbuffer, 1);
incrementing address: not DMA
ptmpQbuffer++;
memcpying from the buffer: not DMA
memcpy(pcmdmessagefld->messagedatabuffer, ver_addr,
allxfer_len);
freeing the buffer: not DMA
kfree(ver_addr);
Daniel
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