On Thu, Dec 10, 2015 at 08:59:45AM +0100, Boris Brezillon 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>
> Cc: <stable@xxxxxxxxxxxxxxx> #3.8+
Does this follow these rules, from
Documentation/stable_kernel_rules.txt?
- It must be obviously correct and tested.
- It must fix a real bug that bothers people (not a, "This could be a
problem..." type thing).
> Fixes: 2a0a288ec258 ("mtd: denali: split the generic driver and PCI layer")
> ---
> drivers/mtd/nand/denali.c | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/drivers/mtd/nand/denali.c b/drivers/mtd/nand/denali.c
> index 67eb2be..8feece3 100644
> --- a/drivers/mtd/nand/denali.c
> +++ b/drivers/mtd/nand/denali.c
> @@ -1622,6 +1622,7 @@ EXPORT_SYMBOL(denali_init);
> /* driver exit point */
> void denali_remove(struct denali_nand_info *denali)
> {
> + 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,
It feels a bit odd to allow usage of MTD fields after it has been
unregistered. Maybe precompute this before the nand_release()?
Brian
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