Commit 2c87f18c authored Mar 17, 2014 by Tatyana Brokhman

mtd: msm_qpic_nand: Don't restrict dma mapping to page boundaries



With the current implementation the nand driver is restricting
itself while doing dma mapping. The hardware wouldn’t know anything
about the kernel page frame organization and the BAM should be able
to access the memory at any boundary.

CRs-fixed: 614187
Change-Id: I9e3d0df1ccbecbe641f3105ab9857140cff9a8e7
Signed-off-by: Sujit Reddy Thumma <sthumma@codeaurora.org>
Signed-off-by: Tatyana Brokhman <tlinder@codeaurora.org>

parent 43ccce02

drivers/mtd/devices/msm_qpic_nand.c

+6 −2

Original line number	Diff line number	Diff line
		@@ -415,9 +415,13 @@ static dma_addr_t msm_nand_dma_map(struct device dev, void addr, size_t size,
		if (virt_addr_valid(addr))
		page = virt_to_page(addr);
		else {
		if (WARN_ON(size + offset > PAGE_SIZE))
		return ~0;
		page = vmalloc_to_page(addr);
		if (!page) {
		pr_err("%s: invalid addr 0x%lx\n",
		__func__, (unsigned long)addr);
		WARN_ON(1);
		return ~0;
		}
		}
		return dma_map_page(dev, page, offset, size, dir);
		}