From: Johannes Thumshirn <jthumshirn@suse.de>
To: Jens Axboe <axboe@fb.com>
Cc: linux-nvme@lists.infradead.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] NVMe: Only release requested regions
Date: Wed, 8 Jun 2016 09:16:29 +0200 [thread overview]
Message-ID: <20160608071629.y2ysgc5lsvv2c6nu@c203.arch.suse.de> (raw)
In-Reply-To: <1462886068-14605-1-git-send-email-jthumshirn@suse.de>
On Tue, May 10, 2016 at 03:14:28PM +0200, Johannes Thumshirn wrote:
> The NVMe driver only requests the PCIe device's memory regions but releases
> all possible regions (including eventual I/O regions). This leads to a stale
> warning entry in dmesg about freeing non existent resources.
>
> Signed-off-by: Johannes Thumshirn <jthumshirn@suse.de>
> ---
> drivers/nvme/host/pci.c | 9 +++++++--
> 1 file changed, 7 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c
> index eec73fe..6f5ad07 100644
> --- a/drivers/nvme/host/pci.c
> +++ b/drivers/nvme/host/pci.c
> @@ -1759,9 +1759,14 @@ static int nvme_pci_enable(struct nvme_dev *dev)
>
> static void nvme_dev_unmap(struct nvme_dev *dev)
> {
> + struct pci_dev *pdev = to_pci_dev(dev->dev);
> + int bars;
> +
> if (dev->bar)
> iounmap(dev->bar);
> - pci_release_regions(to_pci_dev(dev->dev));
> +
> + bars = pci_select_bars(pdev, IORESOURCE_MEM);
> + pci_release_selected_regions(pdev, bars);
> }
>
> static void nvme_pci_disable(struct nvme_dev *dev)
> @@ -1998,7 +2003,7 @@ static int nvme_dev_map(struct nvme_dev *dev)
>
> return 0;
> release:
> - pci_release_regions(pdev);
> + pci_release_selected_regions(pdev, bars);
> return -ENODEV;
> }
>
> --
> 1.8.5.6
>
Jens, ping?
--
Johannes Thumshirn Storage
jthumshirn@suse.de +49 911 74053 689
SUSE LINUX GmbH, Maxfeldstr. 5, 90409 Nürnberg
GF: Felix Imendörffer, Jane Smithard, Graham Norton
HRB 21284 (AG Nürnberg)
Key fingerprint = EC38 9CAB C2C4 F25D 8600 D0D0 0393 969D 2D76 0850
next prev parent reply other threads:[~2016-06-08 7:16 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-05-10 13:14 [PATCH] NVMe: Only release requested regions Johannes Thumshirn
2016-05-10 13:16 ` Hannes Reinecke
2016-05-12 7:03 ` Christoph Hellwig
2016-05-12 7:34 ` Johannes Thumshirn
2016-05-24 9:15 ` Johannes Thumshirn
2016-05-24 9:19 ` Christoph Hellwig
2016-05-24 14:29 ` Keith Busch
2016-06-08 7:16 ` Johannes Thumshirn [this message]
2016-06-09 20:28 ` Jens Axboe
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