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Wysocki" , Geert Uytterhoeven , Paul Walmsley , Palmer Dabbelt , Albert Ou , linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org, linux-pci@vger.kernel.org, Arnd Bergmann Subject: [PATCH v3 23/38] PCI/sysfs: Make I/O resource depend on HAS_IOPORT Date: Tue, 14 Mar 2023 13:12:01 +0100 Message-Id: <20230314121216.413434-24-schnelle@linux.ibm.com> X-Mailer: git-send-email 2.37.2 In-Reply-To: <20230314121216.413434-1-schnelle@linux.ibm.com> References: <20230314121216.413434-1-schnelle@linux.ibm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: hp-FIPNWUNIA28WYjl4VUnjNjJXOxSom X-Proofpoint-GUID: 4twqkcWQOFPIvY_5cnok_bCwlS_GB72B X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.254,Aquarius:18.0.942,Hydra:6.0.573,FMLib:17.11.170.22 definitions=2023-03-14_04,2023-03-14_02,2023-02-09_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 mlxscore=0 lowpriorityscore=0 spamscore=0 malwarescore=0 suspectscore=0 priorityscore=1501 phishscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2212070000 definitions=main-2303140103 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org If legacy I/O spaces are not supported simply return an error when trying to access them via pci_resource_io(). This allows inb() and friends to become undefined when they are known at compile time to be non-functional in a later patch. Co-developed-by: Arnd Bergmann Signed-off-by: Niklas Schnelle --- drivers/pci/pci-sysfs.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c index dd0d9d9bc509..11e92d106761 100644 --- a/drivers/pci/pci-sysfs.c +++ b/drivers/pci/pci-sysfs.c @@ -1083,6 +1083,7 @@ static ssize_t pci_resource_io(struct file *filp, struct kobject *kobj, struct bin_attribute *attr, char *buf, loff_t off, size_t count, bool write) { +#ifdef CONFIG_HAS_IOPORT struct pci_dev *pdev = to_pci_dev(kobj_to_dev(kobj)); int bar = (unsigned long)attr->private; unsigned long port = off; @@ -1116,6 +1117,9 @@ static ssize_t pci_resource_io(struct file *filp, struct kobject *kobj, return 4; } return -EINVAL; +#else + return -ENXIO; +#endif } static ssize_t pci_read_resource_io(struct file *filp, struct kobject *kobj, -- 2.37.2