On Tue, 2010-02-16 at 14:59 -0800, Luis R. Rodriguez wrote:
> > Anyway, I'd rather see
> > dma_sync_single_range_for_device() for ARM backported.
>
> Patches are welcomed for it indeed.
Here's the patch. I'm not sure if include/net/compat-2.6.27.h or
compat/compat-2.6.27.h is the real source file, as I was patching the
downloaded tarball.
The missing functions are only used by b44. The functions available in
2.6.26 don't have the offset argument, so I had to extend the range to
start at zero. This could affect the b44 throughput, but I would not
worry too much about it.
The is another problem. For some reason, CONFIG_SSB_PCMCIAHOST is
enabled in compat_autoconf.h, even though the target kernel lacks PCMCIA
support. However, CONFIG_SSB_PCMCIAHOST is not set in the makefiles, so
ssb.ko is compiled with CONFIG_SSB_PCMCIAHOST, but pcmcia.o is not
linked into it, which leads to unresolved symbols. However, the build
succeeds and there are no warnings about it.
--- a/include/net/compat-2.6.27.h
+++ b/include/net/compat-2.6.27.h
@@ -185,4 +185,28 @@
#endif /* (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,27)) */
+#ifdef CONFIG_ARM
+
+/*
+ * The caller asks to handle a range between offset and offset + size,
+ * but we process a larger range from 0 to offset + size due to lack of
+ * offset support.
+ */
+
+static inline void dma_sync_single_range_for_cpu(struct device *dev,
+ dma_addr_t handle, unsigned long offset, size_t size,
+ enum dma_data_direction dir)
+{
+ dma_sync_single_for_cpu(dev, handle, offset + size, dir);
+}
+
+static inline void dma_sync_single_range_for_device(struct device *dev,
+ dma_addr_t handle, unsigned long offset, size_t size,
+ enum dma_data_direction dir)
+{
+ dma_sync_single_for_device(dev, handle, offset + size, dir);
+}
+
+#endif /* arm */
+
#endif /* LINUX_26_27_COMPAT_H */
--
Regards,
Pavel Roskin
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