From: Israel Rukshin <israelr@xxxxxxxxxxxx> SGL size of PI metadata is usually small. Thus, 1 inline sg should cover most cases. The macro will be used for pre-allocate a single SGL entry for protection information. The preallocation of small inline SGLs depends on SG_CHAIN capability so if the ARCH doesn't support SG_CHAIN, use the runtime allocation for the SGL. This patch is a preparation for adding metadata (T10-PI) over fabric support. Signed-off-by: Israel Rukshin <israelr@xxxxxxxxxxxx> Reviewed-by: Max Gurtovoy <maxg@xxxxxxxxxxxx> Reviewed-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx> --- drivers/nvme/host/nvme.h | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h index af8e10a..d0bfa2b 100644 --- a/drivers/nvme/host/nvme.h +++ b/drivers/nvme/host/nvme.h @@ -30,8 +30,10 @@ #ifdef CONFIG_ARCH_NO_SG_CHAIN #define NVME_INLINE_SG_CNT 0 +#define NVME_INLINE_PROT_SG_CNT 0 #else #define NVME_INLINE_SG_CNT 2 +#define NVME_INLINE_PROT_SG_CNT 1 #endif extern struct workqueue_struct *nvme_wq; -- 1.8.3.1
