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path: root/drivers/pci/pci-sysfs.c
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Diffstat (limited to 'drivers/pci/pci-sysfs.c')
-rw-r--r--drivers/pci/pci-sysfs.c103
1 files changed, 47 insertions, 56 deletions
diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c
index 5d72866897a..db7ec14fa71 100644
--- a/drivers/pci/pci-sysfs.c
+++ b/drivers/pci/pci-sysfs.c
@@ -58,22 +58,23 @@ static ssize_t broken_parity_status_store(struct device *dev,
const char *buf, size_t count)
{
struct pci_dev *pdev = to_pci_dev(dev);
- ssize_t consumed = -EINVAL;
+ unsigned long val;
- if ((count > 0) && (*buf == '0' || *buf == '1')) {
- pdev->broken_parity_status = *buf == '1' ? 1 : 0;
- consumed = count;
- }
- return consumed;
+ if (strict_strtoul(buf, 0, &val) < 0)
+ return -EINVAL;
+
+ pdev->broken_parity_status = !!val;
+
+ return count;
}
static ssize_t local_cpus_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
- cpumask_t mask;
+ const struct cpumask *mask;
int len;
- mask = pcibus_to_cpumask(to_pci_dev(dev)->bus);
+ mask = cpumask_of_pcibus(to_pci_dev(dev)->bus);
len = cpumask_scnprintf(buf, PAGE_SIZE-2, mask);
buf[len++] = '\n';
buf[len] = '\0';
@@ -84,10 +85,10 @@ static ssize_t local_cpus_show(struct device *dev,
static ssize_t local_cpulist_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
- cpumask_t mask;
+ const struct cpumask *mask;
int len;
- mask = pcibus_to_cpumask(to_pci_dev(dev)->bus);
+ mask = cpumask_of_pcibus(to_pci_dev(dev)->bus);
len = cpulist_scnprintf(buf, PAGE_SIZE-2, mask);
buf[len++] = '\n';
buf[len] = '\0';
@@ -101,11 +102,13 @@ resource_show(struct device * dev, struct device_attribute *attr, char * buf)
struct pci_dev * pci_dev = to_pci_dev(dev);
char * str = buf;
int i;
- int max = 7;
+ int max;
resource_size_t start, end;
if (pci_dev->subordinate)
max = DEVICE_COUNT_RESOURCE;
+ else
+ max = PCI_BRIDGE_RESOURCES;
for (i = 0; i < max; i++) {
struct resource *res = &pci_dev->resource[i];
@@ -133,19 +136,23 @@ static ssize_t is_enabled_store(struct device *dev,
struct device_attribute *attr, const char *buf,
size_t count)
{
- ssize_t result = -EINVAL;
struct pci_dev *pdev = to_pci_dev(dev);
+ unsigned long val;
+ ssize_t result = strict_strtoul(buf, 0, &val);
+
+ if (result < 0)
+ return result;
/* this can crash the machine when done on the "wrong" device */
if (!capable(CAP_SYS_ADMIN))
- return count;
+ return -EPERM;
- if (*buf == '0') {
+ if (!val) {
if (atomic_read(&pdev->enable_cnt) != 0)
pci_disable_device(pdev);
else
result = -EIO;
- } else if (*buf == '1')
+ } else
result = pci_enable_device(pdev);
return result < 0 ? result : count;
@@ -185,25 +192,28 @@ msi_bus_store(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct pci_dev *pdev = to_pci_dev(dev);
+ unsigned long val;
+
+ if (strict_strtoul(buf, 0, &val) < 0)
+ return -EINVAL;
/* bad things may happen if the no_msi flag is changed
* while some drivers are loaded */
if (!capable(CAP_SYS_ADMIN))
- return count;
+ return -EPERM;
+ /* Maybe pci devices without subordinate busses shouldn't even have this
+ * attribute in the first place? */
if (!pdev->subordinate)
return count;
- if (*buf == '0') {
- pdev->subordinate->bus_flags |= PCI_BUS_FLAGS_NO_MSI;
- dev_warn(&pdev->dev, "forced subordinate bus to not support MSI,"
- " bad things could happen.\n");
- }
+ /* Is the flag going to change, or keep the value it already had? */
+ if (!(pdev->subordinate->bus_flags & PCI_BUS_FLAGS_NO_MSI) ^
+ !!val) {
+ pdev->subordinate->bus_flags ^= PCI_BUS_FLAGS_NO_MSI;
- if (*buf == '1') {
- pdev->subordinate->bus_flags &= ~PCI_BUS_FLAGS_NO_MSI;
- dev_warn(&pdev->dev, "forced subordinate bus to support MSI,"
- " bad things could happen.\n");
+ dev_warn(&pdev->dev, "forced subordinate bus to%s support MSI,"
+ " bad things could happen\n", val ? "" : " not");
}
return count;
@@ -361,55 +371,33 @@ pci_write_config(struct kobject *kobj, struct bin_attribute *bin_attr,
}
static ssize_t
-pci_read_vpd(struct kobject *kobj, struct bin_attribute *bin_attr,
- char *buf, loff_t off, size_t count)
+read_vpd_attr(struct kobject *kobj, struct bin_attribute *bin_attr,
+ char *buf, loff_t off, size_t count)
{
struct pci_dev *dev =
to_pci_dev(container_of(kobj, struct device, kobj));
- int end;
- int ret;
if (off > bin_attr->size)
count = 0;
else if (count > bin_attr->size - off)
count = bin_attr->size - off;
- end = off + count;
-
- while (off < end) {
- ret = dev->vpd->ops->read(dev, off, end - off, buf);
- if (ret < 0)
- return ret;
- buf += ret;
- off += ret;
- }
- return count;
+ return pci_read_vpd(dev, off, count, buf);
}
static ssize_t
-pci_write_vpd(struct kobject *kobj, struct bin_attribute *bin_attr,
- char *buf, loff_t off, size_t count)
+write_vpd_attr(struct kobject *kobj, struct bin_attribute *bin_attr,
+ char *buf, loff_t off, size_t count)
{
struct pci_dev *dev =
to_pci_dev(container_of(kobj, struct device, kobj));
- int end;
- int ret;
if (off > bin_attr->size)
count = 0;
else if (count > bin_attr->size - off)
count = bin_attr->size - off;
- end = off + count;
-
- while (off < end) {
- ret = dev->vpd->ops->write(dev, off, end - off, buf);
- if (ret < 0)
- return ret;
- buf += ret;
- off += ret;
- }
- return count;
+ return pci_write_vpd(dev, off, count, buf);
}
#ifdef HAVE_PCI_LEGACY
@@ -569,7 +557,7 @@ void pci_remove_legacy_files(struct pci_bus *b)
#ifdef HAVE_PCI_MMAP
-static int pci_mmap_fits(struct pci_dev *pdev, int resno, struct vm_area_struct *vma)
+int pci_mmap_fits(struct pci_dev *pdev, int resno, struct vm_area_struct *vma)
{
unsigned long nr, start, size;
@@ -620,6 +608,9 @@ pci_mmap_resource(struct kobject *kobj, struct bin_attribute *attr,
vma->vm_pgoff += start >> PAGE_SHIFT;
mmap_type = res->flags & IORESOURCE_MEM ? pci_mmap_mem : pci_mmap_io;
+ if (res->flags & IORESOURCE_MEM && iomem_is_exclusive(start))
+ return -EINVAL;
+
return pci_mmap_page_range(pdev, vma, mmap_type, write_combine);
}
@@ -832,8 +823,8 @@ static int pci_create_capabilities_sysfs(struct pci_dev *dev)
attr->size = dev->vpd->len;
attr->attr.name = "vpd";
attr->attr.mode = S_IRUSR | S_IWUSR;
- attr->read = pci_read_vpd;
- attr->write = pci_write_vpd;
+ attr->read = read_vpd_attr;
+ attr->write = write_vpd_attr;
retval = sysfs_create_bin_file(&dev->dev.kobj, attr);
if (retval) {
kfree(dev->vpd->attr);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-11 16:30:14 +0000