+ Dinh (who made commit 2a0a288ec258)
Also added back the Fixes tag.
On Fri, 11 Dec 2015 15:02:34 +0100
Boris Brezillon <boris.brezillon@xxxxxxxxxxxxxxxxxx> wrote:
> Unregister the NAND device from the NAND subsystem when removing a denali
> NAND controller, otherwise the MTD attached to the NAND device is still
> exposed by the MTD layer, and accesses to this device will likely crash
> the system.
>
> Signed-off-by: Boris Brezillon <boris.brezillon@xxxxxxxxxxxxxxxxxx>
Fixes: 2a0a288ec258 ("mtd: denali: split the generic driver and PCI layer")
> ---
> Changes since v4:
> - remove Cc stable and fixes tags
> - calculate the dma buffer size before calling nand_release()
>
> drivers/mtd/nand/denali.c | 6 ++++--
> 1 file changed, 4 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/mtd/nand/denali.c b/drivers/mtd/nand/denali.c
> index 67eb2be..fdfea05 100644
> --- a/drivers/mtd/nand/denali.c
> +++ b/drivers/mtd/nand/denali.c
> @@ -1622,9 +1622,11 @@ EXPORT_SYMBOL(denali_init);
> /* driver exit point */
> void denali_remove(struct denali_nand_info *denali)
> {
> + int bufsize = denali->mtd.writesize + denali->mtd.oobsize;
> +
> + nand_release(&denali->mtd);
> denali_irq_cleanup(denali->irq, denali);
> - dma_unmap_single(denali->dev, denali->buf.dma_buf,
> - denali->mtd.writesize + denali->mtd.oobsize,
> + dma_unmap_single(denali->dev, denali->buf.dma_buf, bufsize,
> DMA_BIDIRECTIONAL);
> }
> EXPORT_SYMBOL(denali_remove);
--
Boris Brezillon, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com
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