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include:mktomail.com include:spf-0014ca01.pphosted.com include:spf.protection.outlook.com include:auth.msgapp.com include:spf.mandrillapp.com ~all X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2018-10-11_07:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_check_notspam policy=outbound_check score=0 priorityscore=1501 malwarescore=0 suspectscore=1 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=379 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1807170000 definitions=main-1810110156 Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The EP driver did not check the mask bit for each MSI before sending it in raise_irq. This is now checked, and -EINVAL is returned if masked. Fixes: 37dddf14f1ae ("PCI: cadence: Add EndPoint Controller driver for Cadence PCIe controller") Signed-off-by: Alan Douglas --- drivers/pci/controller/pcie-cadence-ep.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/pci/controller/pcie-cadence-ep.c b/drivers/pci/controller/pcie-cadence-ep.c index c3a0889..b762214 100644 --- a/drivers/pci/controller/pcie-cadence-ep.c +++ b/drivers/pci/controller/pcie-cadence-ep.c @@ -332,6 +332,11 @@ static int cdns_pcie_ep_send_msi_irq(struct cdns_pcie_ep *ep, u8 fn, if (!interrupt_num || interrupt_num > msi_count) return -EINVAL; + /* Check whether MSI is masked */ + data = cdns_pcie_ep_fn_readw(pcie, fn, cap + PCI_MSI_MASK_64); + if (data & (1 << (interrupt_num - 1))) + return -EINVAL; + /* Compute the data value to be written. */ data_mask = msi_count - 1; data = cdns_pcie_ep_fn_readw(pcie, fn, cap + PCI_MSI_DATA_64);