From nobody Mon Feb 9 14:27:50 2026 Received: from m16.mail.163.com (m16.mail.163.com [117.135.210.3]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 0A122340A72; Wed, 24 Dec 2025 09:51:33 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=117.135.210.3 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1766569898; cv=none; b=FtoG21f+fjWp6+nB627f7OB4KhizOh54PMhi2DBi5YZYvmkDBq7T8GZvcX6VxsrPJmRd8EaZCr1vJ+do0A9NwFseeheYnLykq6HI0+F0hc2pYIFzinsV9LDzqjtNbJ7tVQr2JhF9fcbI+ZWekVsnxgS/UhQeqpFnCacgq+K+lTA= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1766569898; c=relaxed/simple; bh=yw2fYu0PPFjo0dAfqlENDaFVIlGH8hBG1/SQoNs17Yc=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=IESRl4ZYQrjY2Gd4BaH5zcZ/QHTxfmvwfo9rDXjFuJeDjb4Tn/MVjAFziDLac0e8VivNWznNCNS07AzoIwv58HPzVSWtDBsOnyQ1wqYBYgCUNXiCcWiZZy249gLKB1sYD/27Wra5dTldyYlYO3S+qfuF85fa8ED7ItG0otisQxA= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=163.com; spf=pass smtp.mailfrom=163.com; dkim=pass (1024-bit key) header.d=163.com header.i=@163.com header.b=PAYVbZAR; arc=none smtp.client-ip=117.135.210.3 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=163.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=163.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=163.com header.i=@163.com header.b="PAYVbZAR" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=163.com; s=s110527; h=From:To:Subject:Date:Message-ID:MIME-Version; bh=0v JPRDSR/EH9t8/kf6i7PS8sTqbOLtbglU2gMkfbSJc=; b=PAYVbZARTaRonco37B L9MJme6D/NYFqT+3c2DFA7x5f+q9BrATPDJ5ivurDGOugizbK/3aCihGnhEX0K5v Bnt9ocsvl3DtiV1DHz1I/P0IgyyBnr3KuEWKhomJe7pCbw2lxC6zgIZr5sF/+rTq Y3xNMDgjBGI6eSnsrnbypQaQo= Received: from localhost (unknown []) by gzga-smtp-mtada-g1-0 (Coremail) with SMTP id _____wAHUMCDt0tp8yb_CA--.15323S2; Wed, 24 Dec 2025 17:51:00 +0800 (CST) From: Honggang LI To: haris.iqbal@ionos.com, jinpu.wang@ionos.com Cc: jgg@ziepe.ca, leon@kernel.org, danil.kipnis@cloud.ionos.com, linux-rdma@vger.kernel.org, linux-kernel@vger.kernel.org, Honggang LI Subject: [PATCH v2] RDMA/rtrs: client: Fix clt_path::max_pages_per_mr calculation Date: Wed, 24 Dec 2025 17:50:30 +0800 Message-ID: <20251224095030.156465-1-honggangli@163.com> X-Mailer: git-send-email 2.52.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-CM-TRANSID: _____wAHUMCDt0tp8yb_CA--.15323S2 X-Coremail-Antispam: 1Uf129KBjvJXoWxJr4kWr1kXF1rGrWkWF4Durg_yoW8Jw1fpF WfAryqvw17JF47Kan2v34kZry3uwsxArWvgr92v34rWFnYq342qryvk34UWr1DJr1DZrWa qF4UXF4kKayI93DanT9S1TB71UUUUU7qnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDUYxBIdaVFxhVjvjDU0xZFpf9x0pRvksfUUUUU= X-CM-SenderInfo: 5krqwwxdqjzxi6rwjhhfrp/xtbCwwU8gWlLt4UohwAA3E Content-Type: text/plain; charset="utf-8" If device max_mr_size bits in the range [mr_page_shift+31:mr_page_shift] are zero, the `min3` function will set clt_path::max_pages_per_mr to zero. `alloc_path_reqs` will pass zero, which is invalid, as the third parameter to `ib_alloc_mr`. v1 -> v2: Correct the commit message and set max_pages_per_mr to U32_MAX as Michael Gur suggested. Fixes: 6a98d71daea1 ("RDMA/rtrs: client: main functionality") Signed-off-by: Honggang LI Reviewed-by: Michael Gur --- drivers/infiniband/ulp/rtrs/rtrs-clt.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/infiniband/ulp/rtrs/rtrs-clt.c b/drivers/infiniband/ul= p/rtrs/rtrs-clt.c index 71387811b281..e477d2c0ff35 100644 --- a/drivers/infiniband/ulp/rtrs/rtrs-clt.c +++ b/drivers/infiniband/ulp/rtrs/rtrs-clt.c @@ -1464,6 +1464,8 @@ static void query_fast_reg_mode(struct rtrs_clt_path = *clt_path) mr_page_shift =3D max(12, ffs(ib_dev->attrs.page_size_cap) - 1); max_pages_per_mr =3D ib_dev->attrs.max_mr_size; do_div(max_pages_per_mr, (1ull << mr_page_shift)); + if ((u32)max_pages_per_mr =3D=3D 0) + max_pages_per_mr =3D U32_MAX; clt_path->max_pages_per_mr =3D min3(clt_path->max_pages_per_mr, (u32)max_pages_per_mr, ib_dev->attrs.max_fast_reg_page_list_len); --=20 2.52.0