On Thursday 10 January 2013 03:59 PM, Chen Gang wrote:
dma_lch_count is zero before 1st call of omap_system_dma_probe.
omap_dma_reserve_channels has value before 1st call of omap_system_dma_probe
when 1st call of omap_system_dma_probe
we need set dma_lch_count before use it for judging
or which will be failed for omap_dma_reserve_channels
additional info:
this patch is only for fixing bug, not touch the features.
so, not use d->lch_count instead of dma_lch_count for the statement:
&& (omap_dma_reserve_channels <= dma_lch_count))
Why not ? Infact thats the right fix as mentioned in the review.
at least, now, current fixing is equal to above.
in the future
maybe omap_dma_reserve_channels can be set by outside (such as from
/proc)
dma_lch_count is a static global variable which has effect to all
devices.
maybe the original author do not hope the newer is larger than the older
'omap_dma_reserve_channels' when used is suppose to be from command
line. Hence the proposed fix in the review is the right one.
Regards
santosh
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