linux-kernel - Re: [PATCH] nvme:fix the NVME_ID_NS_NVM_STS

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Date:   Tue, 4 Jul 2023 17:45:33 +0530
From:   Kanchan Joshi <joshi.k@...sung.com>
To:     Ankit Kumar <ankit.kumar@...sung.com>
Cc:     Keith Busch <kbusch@...nel.org>, Jens Axboe <axboe@...nel.dk>,
        Christoph Hellwig <hch@....de>,
        Sagi Grimberg <sagi@...mberg.me>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        gost.dev@...sung.com, linux-nvme@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] nvme:fix the NVME_ID_NS_NVM_STS_MASK definition

On Fri, Jun 23, 2023 at 06:08:05PM +0530, Ankit Kumar wrote:
>As per NVMe command set specification 1.0c Storage tag size is 7 bits
>Fixes: 4020aad85c67 ("nvme: add support for enhanced metadata")
>
>Signed-off-by: Ankit Kumar <ankit.kumar@...sung.com>
>---
> include/linux/nvme.h | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
>diff --git a/include/linux/nvme.h b/include/linux/nvme.h
>index 779507ac750b..2819d6c3a6b5 100644
>--- a/include/linux/nvme.h
>+++ b/include/linux/nvme.h
>@@ -473,7 +473,7 @@ struct nvme_id_ns_nvm {
> };
>
> enum {
>-	NVME_ID_NS_NVM_STS_MASK		= 0x3f,
>+	NVME_ID_NS_NVM_STS_MASK		= 0x7f,

Right, 7 bits are needed there to speak the max possible value (i.e.,64).

Reviewed-by: Kanchan Joshi <joshi.k@...sung.com>