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[83.50.185.174]) by smtp.gmail.com with ESMTPSA id w8sm5509969wre.106.2021.12.16.09.55.23 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 16 Dec 2021 09:55:24 -0800 (PST) From: =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= To: qemu-devel@nongnu.org Subject: [PATCH 1/2] hw/nvme/ctrl: Do not ignore DMA access errors Date: Thu, 16 Dec 2021 18:55:09 +0100 Message-Id: <20211216175510.884749-2-philmd@redhat.com> X-Mailer: git-send-email 2.33.1 In-Reply-To: <20211216175510.884749-1-philmd@redhat.com> References: <20211216175510.884749-1-philmd@redhat.com> MIME-Version: 1.0 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=philmd@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=170.10.129.124; envelope-from=philmd@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -34 X-Spam_score: -3.5 X-Spam_bar: --- X-Spam_report: (-3.5 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.718, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Peter Maydell , Mauro Matteo Cascella , qemu-block@nongnu.org, David Hildenbrand , Jason Wang , Li Qiang , Qiuhao Li , Peter Xu , Alexander Bulekov , Keith Busch , Bandan Das , Stefan Hajnoczi , Klaus Jensen , "Edgar E . Iglesias" , =?utf-8?q?Philippe_Mathieu?= =?utf-8?q?-Daud=C3=A9?= , Darren Kenny Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" dma_buf_read/dma_buf_write() return a MemTxResult type. Do not discard it, propagate the DMA error to the caller. Signed-off-by: Philippe Mathieu-Daudé Reviewed-by: Keith Busch --- hw/nvme/ctrl.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/hw/nvme/ctrl.c b/hw/nvme/ctrl.c index fa410a179a6..604ed0aea0d 100644 --- a/hw/nvme/ctrl.c +++ b/hw/nvme/ctrl.c @@ -1147,15 +1147,16 @@ static uint16_t nvme_tx(NvmeCtrl *n, NvmeSg *sg, uint8_t *ptr, uint32_t len, if (sg->flags & NVME_SG_DMA) { const MemTxAttrs attrs = MEMTXATTRS_UNSPECIFIED; + MemTxResult res; uint64_t residual; if (dir == NVME_TX_DIRECTION_TO_DEVICE) { - dma_buf_write(ptr, len, &residual, &sg->qsg, attrs); + res = dma_buf_write(ptr, len, &residual, &sg->qsg, attrs); } else { - dma_buf_read(ptr, len, &residual, &sg->qsg, attrs); + res = dma_buf_read(ptr, len, &residual, &sg->qsg, attrs); } - if (unlikely(residual)) { + if (unlikely(residual) || res != MEMTX_OK) { trace_pci_nvme_err_invalid_dma(); return NVME_INVALID_FIELD | NVME_DNR; }