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- From f1b7824a42505669476f203e126fc26dd1006af2 Mon Sep 17 00:00:00 2001
- From: Yutang Jiang <yutang.jiang@nxp.com>
- Date: Fri, 9 Sep 2016 22:57:55 +0800
- Subject: [PATCH 112/113] driver: spi: fsl-quad: Hang memcpy: Unhandled fault:
- alignment fault
- vmap/iomap based on whether the buffer is in memory region or reserved region.
- However, both map it as non-cacheable memory.
- For armv8 specifically, non-cacheable mapping requests use a memory type
- that has to be accessed aligned to the request size. memcpy() doesn't guarantee
- that. memcpy_toio() can guarantee 4-bytes alignment.
- Signed-off-by: Yunhui Cui <yunhui.cui@nxp.com>
- Integrated-by: Yutang Jiang <yutang.jiang@nxp.com>
- ---
- drivers/mtd/spi-nor/fsl-quadspi.c | 2 +-
- 1 file changed, 1 insertion(+), 1 deletion(-)
- --- a/drivers/mtd/spi-nor/fsl-quadspi.c
- +++ b/drivers/mtd/spi-nor/fsl-quadspi.c
- @@ -1103,7 +1103,7 @@ static ssize_t fsl_qspi_read(struct spi_
- len);
-
- /* Read out the data directly from the AHB buffer.*/
- - memcpy(buf, q->ahb_addr + q->chip_base_addr + from - q->memmap_offs,
- + memcpy_toio(buf, q->ahb_addr + q->chip_base_addr + from - q->memmap_offs,
- len);
-
- return len;
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