Re: [PATCH 09/30] mtd_blkdevs: use blk_mq_alloc_disk

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Hi Christoph,

On 15.06.2021 17:58, Christoph Hellwig wrote:
> On Tue, Jun 15, 2021 at 05:47:44PM +0200, Marek Szyprowski wrote:
>> On 02.06.2021 08:53, Christoph Hellwig wrote:
>>> Use the blk_mq_alloc_disk API to simplify the gendisk and request_queue
>>> allocation.
>>>
>>> Signed-off-by: Christoph Hellwig <hch@xxxxxx>
>> This patch landed in linux-next as commit 6966bb921def ("mtd_blkdevs:
>> use blk_mq_alloc_disk"). It causes the following regression on my QEMU
>> arm64 setup:
> Please try the patch below:
>
> diff --git a/drivers/mtd/mtd_blkdevs.c b/drivers/mtd/mtd_blkdevs.c
> index 5dc4c966ea73..6ce4bc57f919 100644
> --- a/drivers/mtd/mtd_blkdevs.c
> +++ b/drivers/mtd/mtd_blkdevs.c
> @@ -382,6 +382,7 @@ int add_mtd_blktrans_dev(struct mtd_blktrans_dev *new)
>   	}
>   
>   	new->disk = gd;
> +	new->rq = new->disk->queue;
>   	gd->private_data = new;
>   	gd->major = tr->major;
>   	gd->first_minor = (new->devnum) << tr->part_bits;

Right, this fixes the issue, thanks. Feel free to add:

Reported-by: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx>

Tested-by: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx>

Best regards
-- 
Marek Szyprowski, PhD
Samsung R&D Institute Poland

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