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OpenCloudOS-Kernel
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net_dma: call dmaengine_get only if NET_DMA enabled 

Based upon a patch from Atsushi Nemoto <anemo@mba.ocn.ne.jp>

--------------------
The commit 649274d993 ("net_dma:
acquire/release dma channels on ifup/ifdown") added unconditional call
of dmaengine_get() to net_dma.  The API should be called only if
NET_DMA was enabled.
--------------------

Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
David S. Miller 2009-02-06 22:06:43 -08:00
parent 152abd139c
commit b4bd07c20b
2 changed files with 14 additions and 2 deletions
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12
include/linux/dmaengine.h
View File

@ -282,6 +282,18 @@ static inline void dmaengine_put(void)
}
#endif
#ifdef CONFIG_NET_DMA
#define net_dmaengine_get() dmaengine_get()
#define net_dmaengine_put() dmaengine_put()
#else
static inline void net_dmaengine_get(void)
{
}
static inline void net_dmaengine_put(void)
{
}
#endif
dma_cookie_t dma_async_memcpy_buf_to_buf(struct dma_chan *chan,
void *dest, void *src, size_t len);
dma_cookie_t dma_async_memcpy_buf_to_pg(struct dma_chan *chan,

4
net/core/dev.c
View File

@ -1090,7 +1090,7 @@ int dev_open(struct net_device *dev)
/*
* Enable NET_DMA
*/
dmaengine_get();
net_dmaengine_get();
/*
* Initialize multicasting status
@ -1172,7 +1172,7 @@ int dev_close(struct net_device *dev)
/*
* Shutdown NET_DMA
*/
dmaengine_put();
net_dmaengine_put();
return 0;
}