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Tsirkin" Cc: Nicholas Piggin , Marcel Apfelbaum , qemu-devel@nongnu.org Subject: [PATCH 2/2] hw/pci: Assert a bar is not registered multiple times Date: Sat, 18 Jan 2025 03:28:41 +1000 Message-ID: <20250117172842.406338-3-npiggin@gmail.com> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20250117172842.406338-1-npiggin@gmail.com> References: <20250117172842.406338-1-npiggin@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2607:f8b0:4864:20::62e; envelope-from=npiggin@gmail.com; helo=mail-pl1-x62e.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham 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: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @gmail.com) X-ZM-MESSAGEID: 1737135006287019000 Content-Type: text/plain; charset="utf-8" Nothing should be doing this, but it doesn't get caught by pci_register_bar(). Add an assertion to prevent misuse. Signed-off-by: Nicholas Piggin Reviewed-by: Phil Dennis-Jordan --- hw/pci/pci.c | 1 + 1 file changed, 1 insertion(+) diff --git a/hw/pci/pci.c b/hw/pci/pci.c index 2afa423925c..b067a55c5bc 100644 --- a/hw/pci/pci.c +++ b/hw/pci/pci.c @@ -1391,6 +1391,7 @@ void pci_register_bar(PCIDevice *pci_dev, int region_= num, assert(hdr_type !=3D PCI_HEADER_TYPE_BRIDGE || region_num < 2); =20 r =3D &pci_dev->io_regions[region_num]; + assert(!r->size); r->addr =3D PCI_BAR_UNMAPPED; r->size =3D size; r->type =3D type; --=20 2.45.2