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[144.49.247.121]) by smtp-relay.gmail.com with ESMTPS id 00721157ae682-7ea2358dd81sm17399937b3.13.2026.06.09.21.46.47 for (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Tue, 09 Jun 2026 21:46:47 -0700 (PDT) X-Relaying-Domain: broadcom.com X-CFilter-Loop: Reflected Received: by mail-pf1-f200.google.com with SMTP id d2e1a72fcca58-8422f987f2eso9814592b3a.3 for ; Tue, 09 Jun 2026 21:46:47 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=broadcom.com; s=google; t=1781066806; x=1781671606; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=sPRn9GC3oJ3eRTiV4q9LpejtlwI5WrH7/FNR+E+uV48=; b=fFa0Bqv6nCR14zOECI+YrqrXHXkY/MMUkJbGb8Bm32GqkSAAThXWXrm2wnnHJxlUz/ 4uRgePhzd7utXPEjQssgEIBBXNF40NbfpBnGykvkySM79+lDewLYSUIN6UojMoKmx01w 6sydAa2ioF1gip/Qs0hmR5RbtiTPOrz0O4ZP8= X-Received: by 2002:a05:6a00:21c8:b0:842:5564:2e2c with SMTP id d2e1a72fcca58-842b0c08407mr25427656b3a.5.1781066806584; Tue, 09 Jun 2026 21:46:46 -0700 (PDT) X-Received: by 2002:a05:6a00:21c8:b0:842:5564:2e2c with SMTP id d2e1a72fcca58-842b0c08407mr25427624b3a.5.1781066806133; Tue, 09 Jun 2026 21:46:46 -0700 (PDT) Received: from dhcp-10-123-65-43.dhcp.broadcom.net ([192.19.234.250]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-84282375f2dsm24532821b3a.19.2026.06.09.21.46.42 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 09 Jun 2026 21:46:44 -0700 (PDT) From: Selvin Xavier To: leon@kernel.org, jgg@ziepe.ca Cc: linux-rdma@vger.kernel.org, andrew.gospodarek@broadcom.com, kalesh-anakkur.purayil@broadcom.com, sriharsha.basavapatna@broadcom.com, Selvin Xavier Subject: [PATCH 06/11] RDMA/bnxt_re: Avoid repeated requests to allocate WC pages Date: Wed, 10 Jun 2026 03:08:50 -0700 Message-Id: <20260610100855.64212-7-selvin.xavier@broadcom.com> X-Mailer: git-send-email 2.39.3 In-Reply-To: <20260610100855.64212-1-selvin.xavier@broadcom.com> References: <20260610100855.64212-1-selvin.xavier@broadcom.com> Precedence: bulk X-Mailing-List: linux-rdma@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-DetectorID-Processed: b00c1d49-9d2e-4205-b15f-d015386d3d5e Applications can request for allocating multiple WC pages for the same ucontext. As of now, supporting only 1 WC page per ucontext. Adding a check to fail the repeated requests. Fixes: eee6268421a2 ("RDMA/bnxt_re: Move the UAPI methods to a dedicated file") Fixes: 360da60d6c6e ("RDMA/bnxt_re: Enable low latency push") Reviewed-by: Kalesh AP Signed-off-by: Selvin Xavier --- drivers/infiniband/hw/bnxt_re/uapi.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/infiniband/hw/bnxt_re/uapi.c b/drivers/infiniband/hw/bnxt_re/uapi.c index 0fceaf52bf4d..abd8f90ca0fb 100644 --- a/drivers/infiniband/hw/bnxt_re/uapi.c +++ b/drivers/infiniband/hw/bnxt_re/uapi.c @@ -99,6 +99,9 @@ static int UVERBS_HANDLER(BNXT_RE_METHOD_ALLOC_PAGE)(struct uverbs_attr_bundle * switch (alloc_type) { case BNXT_RE_ALLOC_WC_PAGE: if (cctx->modes.db_push) { + /* already allocated — one WC page per context */ + if (uctx->wcdpi.dbr) + return -EEXIST; if (bnxt_qplib_alloc_dpi(&rdev->qplib_res, &uctx->wcdpi, uctx, BNXT_QPLIB_DPI_TYPE_WC)) return -ENOMEM; -- 2.39.3