ArmPkg/ArmDmaLib: fix incorrect device address of double buffer
authorArd Biesheuvel <ard.biesheuvel@linaro.org>
Sat, 12 Nov 2016 13:02:26 +0000 (14:02 +0100)
committerLeif Lindholm <leif.lindholm@linaro.org>
Wed, 30 Nov 2016 16:42:59 +0000 (16:42 +0000)
commit0a99a65d2c8a68b72accfa636fe2633900269128
tree75c4b33fe5e9ddca2b748fac6aef478689fe8088
parentde2ec785e2b11798a3ca7aaf653bc76576d947b0
ArmPkg/ArmDmaLib: fix incorrect device address of double buffer

If double buffering is not required in DmaMap(), the returned device
address is passed through ConvertToPhysicalAddress () to convert the
host address (which in case of DebugUncachedMemoryAllocationLib is not
1:1 mapped) to a physical address, which is what a device would expect
to be able to perform DMA.

By the same reasoning, a double buffer allocated using DmaAllocateBuffer ()
should be converted in the same way, considering that the buffer is allocated
using UncachedAllocatePages (), to which the above equally applies.

So add the missing ConvertToPhysicalAddress () invocation.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Tested-by: Ryan Harkin <ryan.harkin@linaro.org>
Reviewed-by: Leif Lindholm <leif.lindholm@linaro.org>
ArmPkg/Library/ArmDmaLib/ArmDmaLib.c