tree 93a559372fcc905726c6e253e463d101a5916837
parent a5e9d38b226686c89fd78413456535d5b66e8b1f
author Catalin Marinas <catalin.marinas@arm.com> 1277129376 +0100
committer Russell King <rmk+kernel@arm.linux.org.uk> 1277975534 +0100

ARM: 6187/1: The v6_dma_inv_range() function must preserve data on SMP

A recent patch for DMA cache maintenance on ARM11MPCore added a write
for ownership trick to the v6_dma_inv_range() function. Such operation
destroys data already present in the buffer. However, this function is
used with with dma_sync_single_for_device() which is supposed to
preserve the existing data transfered into the buffer. This patch adds a
combination of read/write for ownership to preserve the original data.

Reported-by: Ronen Shitrit <rshitrit@marvell.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>