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Message-ID: <20211202175539.GC3836713@dhcp-10-100-145-180.wdc.com>
Date: Thu, 2 Dec 2021 09:55:39 -0800
From: Keith Busch <kbusch@...nel.org>
To: caojun <caojun@...ontech.com>
Cc: axboe@...com, hch@....de, sagi@...mberg.me,
linux-nvme@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] add Intel 760p/Pro 7600p nvme disk
On Thu, Dec 02, 2021 at 11:02:30AM +0800, caojun wrote:
> Signed-off-by: caojun <caojun@...ontech.com>
What is the purpose of this patch? All of this code already exists from
3 years ago.
> ---
> drivers/nvme/host/core.c | 16 +++++++++-------
> drivers/nvme/host/nvme.h | 5 +++++
> drivers/nvme/host/pci.c | 2 ++
> 3 files changed, 16 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
> index e64310f22..8e0dbfb6a 100644
> --- a/drivers/nvme/host/core.c
> +++ b/drivers/nvme/host/core.c
> @@ -2155,14 +2155,16 @@ static void nvme_init_subnqn(struct nvme_subsystem *subsys, struct nvme_ctrl *ct
> size_t nqnlen;
> int off;
>
> - nqnlen = strnlen(id->subnqn, NVMF_NQN_SIZE);
> - if (nqnlen > 0 && nqnlen < NVMF_NQN_SIZE) {
> - strncpy(subsys->subnqn, id->subnqn, NVMF_NQN_SIZE);
> - return;
> - }
> + if(!(ctrl->quirks & NVME_QUIRK_IGNORE_DEV_SUBNQN)) {
> + nqnlen = strnlen(id->subnqn, NVMF_NQN_SIZE);
> + if (nqnlen > 0 && nqnlen < NVMF_NQN_SIZE) {
> + strlcpy(subsys->subnqn, id->subnqn, NVMF_NQN_SIZE);
> + return;
> + }
>
> - if (ctrl->vs >= NVME_VS(1, 2, 1))
> - dev_warn(ctrl->device, "missing or invalid SUBNQN field.\n");
> + if (ctrl->vs >= NVME_VS(1, 2, 1))
> + dev_warn(ctrl->device, "missing or invalid SUBNQN field.\n");
> + }
>
> /* Generate a "fake" NQN per Figure 254 in NVMe 1.3 + ECN 001 */
> off = snprintf(subsys->subnqn, NVMF_NQN_SIZE,
> diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h
> index 276975506..5f5a91518 100644
> --- a/drivers/nvme/host/nvme.h
> +++ b/drivers/nvme/host/nvme.h
> @@ -90,6 +90,11 @@ enum nvme_quirks {
> * Set MEDIUM priority on SQ creation
> */
> NVME_QUIRK_MEDIUM_PRIO_SQ = (1 << 7),
> +
> + /*
> + * Ignore device provided subnqn.
> + */
> + NVME_QUIRK_IGNORE_DEV_SUBNQN = (1 << 8),
> };
>
> /*
> diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c
> index d7cf3202c..fcac05528 100644
> --- a/drivers/nvme/host/pci.c
> +++ b/drivers/nvme/host/pci.c
> @@ -2713,6 +2713,8 @@ static const struct pci_device_id nvme_id_table[] = {
> { PCI_VDEVICE(INTEL, 0xf1a5), /* Intel 600P/P3100 */
> .driver_data = NVME_QUIRK_NO_DEEPEST_PS |
> NVME_QUIRK_MEDIUM_PRIO_SQ },
> + { PCI_VDEVICE(INTEL, 0xf1a6), /* Intel 760p/Pro 7600p */
> + .driver_data = NVME_QUIRK_IGNORE_DEV_SUBNQN, },
> { PCI_VDEVICE(INTEL, 0x5845), /* Qemu emulated controller */
> .driver_data = NVME_QUIRK_IDENTIFY_CNS, },
> { PCI_DEVICE(0x1bb1, 0x0100), /* Seagate Nytro Flash Storage */
> --
> 2.20.1
>
>
>
>
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