Hi Wen,
Wen Yang <yellowriver2...@hotmail.com> wrote on Thu, 7 Feb 2019
03:50:55 +0000:
> of_find_device_by_node() takes a reference to the struct device
> when it finds a match via get_device, there is no need to call
> get_device() twice.
> We also should make sure to drop the reference to the device
> taken by of_find_device_by_node() on driver unbind.
>
> Fixes: f88fc122cc34 ("mtd: nand: Cleanup/rework the atmel_nand driver")
> Signed-off-by: Wen Yang <yellowriver2...@hotmail.com>
> Suggested-by: Boris Brezillon <bbrezil...@kernel.org>
Suggested-by means that Boris suggested you to write this patch in the
first place. If he just made a review, you should drop this tag.
> Reviewed-by: Boris Brezillon <bbrezil...@kernel.org>
> Reviewed-by: Miquel Raynal <miquel.ray...@bootlin.com>
None of us gave our Reviewed-by officially, so you can drop these lines.
> Acked-by: Miquel Raynal <miquel.ray...@bootlin.com>
I gave my Acked-by because I though Boris would take the patch, but
actually he will not, so you can drop the Ack.
> Cc: Tudor Ambarus <tudor.amba...@microchip.com>
> Cc: Boris Brezillon <bbrezil...@kernel.org>
> Cc: Miquel Raynal <miquel.ray...@bootlin.com>
> Cc: Richard Weinberger <rich...@nod.at>
> Cc: David Woodhouse <dw...@infradead.org>
> Cc: Brian Norris <computersforpe...@gmail.com>
> Cc: Marek Vasut <marek.va...@gmail.com>
> Cc: Nicolas Ferre <nicolas.fe...@microchip.com>
> Cc: Alexandre Belloni <alexandre.bell...@bootlin.com>
> Cc: Ludovic Desroches <ludovic.desroc...@microchip.com>
> Cc: linux-...@lists.infradead.org
> Cc: linux-arm-ker...@lists.infradead.org
> Cc: linux-kernel@vger.kernel.org
Please add people in Cc when you send the series and remove all these
Cc: lines.
> ---
> v4->v3: Avoid two times of calling grtform_get_drvdata()
> v3->v2: Change the commit message.
> v2->v1: Add missing Fixes tag
>
> drivers/mtd/nand/raw/atmel/pmecc.c | 21 +++++++++++++++------
> 1 file changed, 15 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/mtd/nand/raw/atmel/pmecc.c
> b/drivers/mtd/nand/raw/atmel/pmecc.c
> index 555a74e..9d39978 100644
> --- a/drivers/mtd/nand/raw/atmel/pmecc.c
> +++ b/drivers/mtd/nand/raw/atmel/pmecc.c
> @@ -876,23 +876,32 @@ static struct atmel_pmecc
> *atmel_pmecc_get_by_node(struct device *userdev,
> {
> struct platform_device *pdev;
> struct atmel_pmecc *pmecc, **ptr;
> + int ret;
>
> pdev = of_find_device_by_node(np);
> - if (!pdev || !platform_get_drvdata(pdev))
> + if (!pdev)
> return ERR_PTR(-EPROBE_DEFER);
New line missing here
> + pmecc = platform_get_drvdata(pdev);
> + if (!pmecc) {
> + ret = -EPROBE_DEFER;
> + goto err_put_device;
> + }
>
> ptr = devres_alloc(devm_atmel_pmecc_put, sizeof(*ptr), GFP_KERNEL);
> - if (!ptr)
> - return ERR_PTR(-ENOMEM);
> -
> - get_device(&pdev->dev);
> - pmecc = platform_get_drvdata(pdev);
> + if (!ptr) {
> + ret = -ENOMEM;
> + goto err_put_device;
> + }
>
> *ptr = pmecc;
>
> devres_add(userdev, ptr);
>
> return pmecc;
> +
> +err_put_device:
> + put_device(&pdev->dev);
> + return ERR_PTR(ret);
> }
>
> static const int atmel_pmecc_strengths[] = { 2, 4, 8, 12, 24, 32 };
All the comments apply to the two other patches.
Otherwise looks good.
Thanks,
Miquèl
