From mboxrd@z Thu Jan  1 00:00:00 1970
From: keith.busch@linux.intel.com (Keith Busch)
Date: Tue, 8 May 2018 10:22:26 -0600
Subject: [PATCH v2] nvme: add quirk to force medium priority for SQ
 creation
In-Reply-To: <879357dd-937c-4496-84af-f804877562eb@kernel.dk>
References: <879357dd-937c-4496-84af-f804877562eb@kernel.dk>
Message-ID: <20180508162226.GA31027@localhost.localdomain>

On Tue, May 08, 2018@09:54:20AM -0600, Jens Axboe wrote:
> --- a/drivers/nvme/host/pci.c
> +++ b/drivers/nvme/host/pci.c
> @@ -1097,6 +1097,14 @@ static int adapter_alloc_sq(struct nvme_dev *dev, u16 qid,
>  	int flags = NVME_QUEUE_PHYS_CONTIG;
>  
>  	/*
> +	 * Some drives have a bug that auto-enables WRRU if MEDIUM isn't
> +	 * set. Since URGENT priority is zeroes, it makes all queues
> +	 * URGENT.
> +	 */
> +	if (ctrl->quirks & NVME_QUIRK_MEDIUM_PRIO_SQ)
> +		flags |= NVME_SQ_PRIO_MEDIUM;

'ctrl' is undeclared in this function; must be 'dev->ctrl.quirks'.