tree 900e73dfa0629d6a3f3739322c9ad3d32ddfe653
parent 8d30cc9a6e6162f934d6e45ac07d1748864a7688
author Mischa Jonker <mischa.jonker@synopsys.com> 1374840494 +0200
committer Pantelis Antoniou <panto@antoniou-consulting.com> 1379692751 +0300

mmc/dw_mmc: Fix DMA descriptor corruption

In dwmci_prepare_data, the descriptors are allocated for DMA transfer.
These are allocated using the ALLOC_CACHE_ALIGN_BUFFER. This macro uses
the stack to allocate these descriptors. This becomes a problem if the
DMA transfer continues after the processor leaves the function in which
the descriptors were allocated.

Therefore, I have moved the allocated of the buffers up one level, to
dwmci_send_cmd(). The DMA transfer should be complete when leaving this
function.

Signed-off-by: Mischa Jonker <mjonker@synopsys.com>
Cc: Alexey Brodkin <abrodkin@synopsys.com>
Cc: Jaehoon Chung <jh80.chung@samsung.com>
Cc: Andy Fleming <afleming@gmail.com>
Acked-by: Jaehoon Chung <jh80.chung@samsung.com>
Acked-by: Pantelis Antoniou <panto@antoniou-consulting.com>