From: Michael Margolin <mrgolin@amazon.com>
To: <jgg@nvidia.com>, <leon@kernel.org>, <linux-rdma@vger.kernel.org>
Cc: <sleybo@amazon.com>, <matua@amazon.com>, <gal.pressman@linux.dev>,
"Tom Sela" <tomsela@amazon.com>,
Yonatan Nachum <ynachum@amazon.com>
Subject: [PATCH] RDMA/efa: Remove possible negative shift
Date: Wed, 10 Dec 2025 17:36:56 +0000 [thread overview]
Message-ID: <20251210173656.8180-1-mrgolin@amazon.com> (raw)
The page size used for device might in some cases be smaller than
PAGE_SIZE what results in a negative shift when calculating the number
of host pages in PAGE_SIZE for a debug log. Remove the debug line
together with the calculation.
Reviewed-by: Tom Sela <tomsela@amazon.com>
Reviewed-by: Yonatan Nachum <ynachum@amazon.com>
Signed-off-by: Michael Margolin <mrgolin@amazon.com>
---
drivers/infiniband/hw/efa/efa_verbs.c | 4 ----
1 file changed, 4 deletions(-)
diff --git a/drivers/infiniband/hw/efa/efa_verbs.c b/drivers/infiniband/hw/efa/efa_verbs.c
index 22d3e25c3b9d..755bba8d58bb 100644
--- a/drivers/infiniband/hw/efa/efa_verbs.c
+++ b/drivers/infiniband/hw/efa/efa_verbs.c
@@ -1320,13 +1320,9 @@ static int umem_to_page_list(struct efa_dev *dev,
u32 hp_cnt,
u8 hp_shift)
{
- u32 pages_in_hp = BIT(hp_shift - PAGE_SHIFT);
struct ib_block_iter biter;
unsigned int hp_idx = 0;
- ibdev_dbg(&dev->ibdev, "hp_cnt[%u], pages_in_hp[%u]\n",
- hp_cnt, pages_in_hp);
-
rdma_umem_for_each_dma_block(umem, &biter, BIT(hp_shift))
page_list[hp_idx++] = rdma_block_iter_dma_address(&biter);
--
2.47.3
next reply other threads:[~2025-12-10 17:37 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-12-10 17:36 Michael Margolin [this message]
2025-12-10 18:00 ` [PATCH] RDMA/efa: Remove possible negative shift Gal Pressman
2025-12-17 18:04 ` Jason Gunthorpe
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