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Merge branch 'pci/sysfs' 

- Fix dsm_label_utf16s_to_utf8s() buffer overrun (Krzysztof Wilczyński)

- Use sysfs_emit() and sysfs_emit_at() in "show" functions (Krzysztof
  Wilczyński)

- Fix 'resource_alignment' newline issues (Krzysztof Wilczyński)

- Add newline to 'devspec' sysfs file (Krzysztof Wilczyński)

* pci/sysfs:
  PCI/sysfs: Add 'devspec' newline
  PCI/sysfs: Fix 'resource_alignment' newline issues
  PCI/sysfs: Use sysfs_emit() and sysfs_emit_at() in "show" functions
  PCI/sysfs: Rely on lengths from scnprintf(), dsm_label_utf16s_to_utf8s()
  PCI/sysfs: Fix dsm_label_utf16s_to_utf8s() buffer overrun

# Conflicts:
#	drivers/pci/p2pdma.c
This commit is contained in:
Bjorn Helgaas 2021-07-06 10:56:25 -05:00
parent 131e4f76c9 14c19b2a40
commit 7132700067
13 changed files with 104 additions and 90 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
drivers/pci/hotplug/pci_hotplug_core.c
View File

@ -73,7 +73,7 @@ static ssize_t power_read_file(struct pci_slot *pci_slot, char *buf)
if (retval)
return retval;
return sprintf(buf, "%d\n", value);
return sysfs_emit(buf, "%d\n", value);
}
static ssize_t power_write_file(struct pci_slot *pci_slot, const char *buf,
@ -130,7 +130,7 @@ static ssize_t attention_read_file(struct pci_slot *pci_slot, char *buf)
if (retval)
return retval;
return sprintf(buf, "%d\n", value);
return sysfs_emit(buf, "%d\n", value);
}
static ssize_t attention_write_file(struct pci_slot *pci_slot, const char *buf,
@ -175,7 +175,7 @@ static ssize_t latch_read_file(struct pci_slot *pci_slot, char *buf)
if (retval)
return retval;
return sprintf(buf, "%d\n", value);
return sysfs_emit(buf, "%d\n", value);
}
static struct pci_slot_attribute hotplug_slot_attr_latch = {
@ -192,7 +192,7 @@ static ssize_t presence_read_file(struct pci_slot *pci_slot, char *buf)
if (retval)
return retval;
return sprintf(buf, "%d\n", value);
return sysfs_emit(buf, "%d\n", value);
}
static struct pci_slot_attribute hotplug_slot_attr_presence = {

4
drivers/pci/hotplug/rpadlpar_sysfs.c
View File

@ -50,7 +50,7 @@ static ssize_t add_slot_store(struct kobject *kobj, struct kobj_attribute *attr,
static ssize_t add_slot_show(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
{
return sprintf(buf, "0\n");
return sysfs_emit(buf, "0\n");
}
static ssize_t remove_slot_store(struct kobject *kobj,
@ -80,7 +80,7 @@ static ssize_t remove_slot_store(struct kobject *kobj,
static ssize_t remove_slot_show(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
{
return sprintf(buf, "0\n");
return sysfs_emit(buf, "0\n");
}
static struct kobj_attribute add_slot_attr =

38
drivers/pci/hotplug/shpchp_sysfs.c
View File

@ -24,50 +24,54 @@
static ssize_t show_ctrl(struct device *dev, struct device_attribute *attr, char *buf)
{
struct pci_dev *pdev;
char *out = buf;
int index, busnr;
struct resource *res;
struct pci_bus *bus;
size_t len = 0;
pdev = to_pci_dev(dev);
bus = pdev->subordinate;
out += sprintf(buf, "Free resources: memory\n");
len += sysfs_emit_at(buf, len, "Free resources: memory\n");
pci_bus_for_each_resource(bus, res, index) {
if (res && (res->flags & IORESOURCE_MEM) &&
!(res->flags & IORESOURCE_PREFETCH)) {
out += sprintf(out, "start = %8.8llx, length = %8.8llx\n",
(unsigned long long)res->start,
(unsigned long long)resource_size(res));
len += sysfs_emit_at(buf, len,
"start = %8.8llx, length = %8.8llx\n",
(unsigned long long)res->start,
(unsigned long long)resource_size(res));
}
}
out += sprintf(out, "Free resources: prefetchable memory\n");
len += sysfs_emit_at(buf, len, "Free resources: prefetchable memory\n");
pci_bus_for_each_resource(bus, res, index) {
if (res && (res->flags & IORESOURCE_MEM) &&
(res->flags & IORESOURCE_PREFETCH)) {
out += sprintf(out, "start = %8.8llx, length = %8.8llx\n",
(unsigned long long)res->start,
(unsigned long long)resource_size(res));
len += sysfs_emit_at(buf, len,
"start = %8.8llx, length = %8.8llx\n",
(unsigned long long)res->start,
(unsigned long long)resource_size(res));
}
}
out += sprintf(out, "Free resources: IO\n");
len += sysfs_emit_at(buf, len, "Free resources: IO\n");
pci_bus_for_each_resource(bus, res, index) {
if (res && (res->flags & IORESOURCE_IO)) {
out += sprintf(out, "start = %8.8llx, length = %8.8llx\n",
(unsigned long long)res->start,
(unsigned long long)resource_size(res));
len += sysfs_emit_at(buf, len,
"start = %8.8llx, length = %8.8llx\n",
(unsigned long long)res->start,
(unsigned long long)resource_size(res));
}
}
out += sprintf(out, "Free resources: bus numbers\n");
len += sysfs_emit_at(buf, len, "Free resources: bus numbers\n");
for (busnr = bus->busn_res.start; busnr <= bus->busn_res.end; busnr++) {
if (!pci_find_bus(pci_domain_nr(bus), busnr))
break;
}
if (busnr < bus->busn_res.end)
out += sprintf(out, "start = %8.8x, length = %8.8x\n",
busnr, (int)(bus->busn_res.end - busnr));
len += sysfs_emit_at(buf, len,
"start = %8.8x, length = %8.8x\n",
busnr, (int)(bus->busn_res.end - busnr));
return out - buf;
return len;
}
static DEVICE_ATTR(ctrl, S_IRUGO, show_ctrl, NULL);

12
drivers/pci/iov.c
View File

@ -346,7 +346,7 @@ static ssize_t sriov_totalvfs_show(struct device *dev,
{
struct pci_dev *pdev = to_pci_dev(dev);
return sprintf(buf, "%u\n", pci_sriov_get_totalvfs(pdev));
return sysfs_emit(buf, "%u\n", pci_sriov_get_totalvfs(pdev));
}
static ssize_t sriov_numvfs_show(struct device *dev,
@ -361,7 +361,7 @@ static ssize_t sriov_numvfs_show(struct device *dev,
num_vfs = pdev->sriov->num_VFs;
device_unlock(&pdev->dev);
return sprintf(buf, "%u\n", num_vfs);
return sysfs_emit(buf, "%u\n", num_vfs);
}
/*
@ -435,7 +435,7 @@ static ssize_t sriov_offset_show(struct device *dev,
{
struct pci_dev *pdev = to_pci_dev(dev);
return sprintf(buf, "%u\n", pdev->sriov->offset);
return sysfs_emit(buf, "%u\n", pdev->sriov->offset);
}
static ssize_t sriov_stride_show(struct device *dev,
@ -444,7 +444,7 @@ static ssize_t sriov_stride_show(struct device *dev,
{
struct pci_dev *pdev = to_pci_dev(dev);
return sprintf(buf, "%u\n", pdev->sriov->stride);
return sysfs_emit(buf, "%u\n", pdev->sriov->stride);
}
static ssize_t sriov_vf_device_show(struct device *dev,
@ -453,7 +453,7 @@ static ssize_t sriov_vf_device_show(struct device *dev,
{
struct pci_dev *pdev = to_pci_dev(dev);
return sprintf(buf, "%x\n", pdev->sriov->vf_device);
return sysfs_emit(buf, "%x\n", pdev->sriov->vf_device);
}
static ssize_t sriov_drivers_autoprobe_show(struct device *dev,
@ -462,7 +462,7 @@ static ssize_t sriov_drivers_autoprobe_show(struct device *dev,
{
struct pci_dev *pdev = to_pci_dev(dev);
return sprintf(buf, "%u\n", pdev->sriov->drivers_autoprobe);
return sysfs_emit(buf, "%u\n", pdev->sriov->drivers_autoprobe);
}
static ssize_t sriov_drivers_autoprobe_store(struct device *dev,

8
drivers/pci/msi.c
View File

@ -464,11 +464,11 @@ static ssize_t msi_mode_show(struct device *dev, struct device_attribute *attr,
return retval;
entry = irq_get_msi_desc(irq);
if (entry)
return sprintf(buf, "%s\n",
entry->msi_attrib.is_msix ? "msix" : "msi");
if (!entry)
return -ENODEV;
return -ENODEV;
return sysfs_emit(buf, "%s\n",
entry->msi_attrib.is_msix ? "msix" : "msi");
}
static int populate_msi_sysfs(struct pci_dev *pdev)

6
drivers/pci/p2pdma.c
View File

@ -57,7 +57,7 @@ static ssize_t size_show(struct device *dev, struct device_attribute *attr,
size = gen_pool_size(p2pdma->pool);
rcu_read_unlock();
return scnprintf(buf, PAGE_SIZE, "%zd\n", size);
return sysfs_emit(buf, "%zd\n", size);
}
static DEVICE_ATTR_RO(size);
@ -74,7 +74,7 @@ static ssize_t available_show(struct device *dev, struct device_attribute *attr,
avail = gen_pool_avail(p2pdma->pool);
rcu_read_unlock();
return scnprintf(buf, PAGE_SIZE, "%zd\n", avail);
return sysfs_emit(buf, "%zd\n", avail);
}
static DEVICE_ATTR_RO(available);
@ -91,7 +91,7 @@ static ssize_t published_show(struct device *dev, struct device_attribute *attr,
published = p2pdma->p2pmem_published;
rcu_read_unlock();
return scnprintf(buf, PAGE_SIZE, "%d\n", published);
return sysfs_emit(buf, "%d\n", published);
}
static DEVICE_ATTR_RO(published);

22
drivers/pci/pci-label.c
View File

@ -139,14 +139,17 @@ enum acpi_attr_enum {
ACPI_ATTR_INDEX_SHOW,
};
static void dsm_label_utf16s_to_utf8s(union acpi_object *obj, char *buf)
static int dsm_label_utf16s_to_utf8s(union acpi_object *obj, char *buf)
{
int len;
len = utf16s_to_utf8s((const wchar_t *)obj->buffer.pointer,
obj->buffer.length,
UTF16_LITTLE_ENDIAN,
buf, PAGE_SIZE);
buf[len] = '\n';
buf, PAGE_SIZE - 1);
buf[len++] = '\n';
return len;
}
static int dsm_get_label(struct device *dev, char *buf,
@ -154,7 +157,7 @@ static int dsm_get_label(struct device *dev, char *buf,
{
acpi_handle handle = ACPI_HANDLE(dev);
union acpi_object *obj, *tmp;
int len = -1;
int len = 0;
if (!handle)
return -1;
@ -175,20 +178,19 @@ static int dsm_get_label(struct device *dev, char *buf,
* this entry must return a null string.
*/
if (attr == ACPI_ATTR_INDEX_SHOW) {
scnprintf(buf, PAGE_SIZE, "%llu\n", tmp->integer.value);
len = sysfs_emit(buf, "%llu\n", tmp->integer.value);
} else if (attr == ACPI_ATTR_LABEL_SHOW) {
if (tmp[1].type == ACPI_TYPE_STRING)
scnprintf(buf, PAGE_SIZE, "%s\n",
tmp[1].string.pointer);
len = sysfs_emit(buf, "%s\n",
tmp[1].string.pointer);
else if (tmp[1].type == ACPI_TYPE_BUFFER)
dsm_label_utf16s_to_utf8s(tmp + 1, buf);
len = dsm_label_utf16s_to_utf8s(tmp + 1, buf);
}
len = strlen(buf) > 0 ? strlen(buf) : -1;
}
ACPI_FREE(obj);
return len;
return len > 0 ? len : -1;
}
static ssize_t label_show(struct device *dev, struct device_attribute *attr,

2
drivers/pci/pci-sysfs.c
View File

@ -537,7 +537,7 @@ static ssize_t devspec_show(struct device *dev,
if (np == NULL)
return 0;
return sysfs_emit(buf, "%pOF", np);
return sysfs_emit(buf, "%pOF\n", np);
}
static DEVICE_ATTR_RO(devspec);
#endif

34
drivers/pci/pci.c
View File

@ -6443,34 +6443,40 @@ static ssize_t resource_alignment_show(struct bus_type *bus, char *buf)
spin_lock(&resource_alignment_lock);
if (resource_alignment_param)
count = scnprintf(buf, PAGE_SIZE, "%s", resource_alignment_param);
count = sysfs_emit(buf, "%s\n", resource_alignment_param);
spin_unlock(&resource_alignment_lock);
/*
* When set by the command line, resource_alignment_param will not
* have a trailing line feed, which is ugly. So conditionally add
* it here.
*/
if (count >= 2 && buf[count - 2] != '\n' && count < PAGE_SIZE - 1) {
buf[count - 1] = '\n';
buf[count++] = 0;
}
return count;
}
static ssize_t resource_alignment_store(struct bus_type *bus,
const char *buf, size_t count)
{
char *param = kstrndup(buf, count, GFP_KERNEL);
char *param, *old, *end;
if (count >= (PAGE_SIZE - 1))
return -EINVAL;
param = kstrndup(buf, count, GFP_KERNEL);
if (!param)
return -ENOMEM;
end = strchr(param, '\n');
if (end)
*end = '\0';
spin_lock(&resource_alignment_lock);
kfree(resource_alignment_param);
resource_alignment_param = param;
old = resource_alignment_param;
if (strlen(param)) {
resource_alignment_param = param;
} else {
kfree(param);
resource_alignment_param = NULL;
}
spin_unlock(&resource_alignment_lock);
kfree(old);
return count;
}

20
drivers/pci/pcie/aer.c
View File

@ -529,21 +529,23 @@ static const char *aer_agent_string[] = {
char *buf) \
{ \
unsigned int i; \
char *str = buf; \
struct pci_dev *pdev = to_pci_dev(dev); \
u64 *stats = pdev->aer_stats->stats_array; \
size_t len = 0; \
\
for (i = 0; i < ARRAY_SIZE(strings_array); i++) { \
if (strings_array[i]) \
str += sprintf(str, "%s %llu\n", \
strings_array[i], stats[i]); \
len += sysfs_emit_at(buf, len, "%s %llu\n", \
strings_array[i], \
stats[i]); \
else if (stats[i]) \
str += sprintf(str, #stats_array "_bit[%d] %llu\n",\
i, stats[i]); \
len += sysfs_emit_at(buf, len, \
#stats_array "_bit[%d] %llu\n",\
i, stats[i]); \
} \
str += sprintf(str, "TOTAL_%s %llu\n", total_string, \
pdev->aer_stats->total_field); \
return str-buf; \
len += sysfs_emit_at(buf, len, "TOTAL_%s %llu\n", total_string, \
pdev->aer_stats->total_field); \
return len; \
} \
static DEVICE_ATTR_RO(name)
@ -563,7 +565,7 @@ aer_stats_dev_attr(aer_dev_nonfatal, dev_nonfatal_errs,
char *buf) \
{ \
struct pci_dev *pdev = to_pci_dev(dev); \
return sprintf(buf, "%llu\n", pdev->aer_stats->field); \
return sysfs_emit(buf, "%llu\n", pdev->aer_stats->field); \
} \
static DEVICE_ATTR_RO(name)

4
drivers/pci/pcie/aspm.c
View File

@ -1208,7 +1208,7 @@ static ssize_t aspm_attr_show_common(struct device *dev,
struct pci_dev *pdev = to_pci_dev(dev);
struct pcie_link_state *link = pcie_aspm_get_link(pdev);
return sprintf(buf, "%d\n", (link->aspm_enabled & state) ? 1 : 0);
return sysfs_emit(buf, "%d\n", (link->aspm_enabled & state) ? 1 : 0);
}
static ssize_t aspm_attr_store_common(struct device *dev,
@ -1265,7 +1265,7 @@ static ssize_t clkpm_show(struct device *dev,
struct pci_dev *pdev = to_pci_dev(dev);
struct pcie_link_state *link = pcie_aspm_get_link(pdev);
return sprintf(buf, "%d\n", link->clkpm_enabled);
return sysfs_emit(buf, "%d\n", link->clkpm_enabled);
}
static ssize_t clkpm_store(struct device *dev,

18
drivers/pci/slot.c
View File

@ -39,19 +39,19 @@ static const struct sysfs_ops pci_slot_sysfs_ops = {
static ssize_t address_read_file(struct pci_slot *slot, char *buf)
{
if (slot->number == 0xff)
return sprintf(buf, "%04x:%02x\n",
pci_domain_nr(slot->bus),
slot->bus->number);
else
return sprintf(buf, "%04x:%02x:%02x\n",
pci_domain_nr(slot->bus),
slot->bus->number,
slot->number);
return sysfs_emit(buf, "%04x:%02x\n",
pci_domain_nr(slot->bus),
slot->bus->number);
return sysfs_emit(buf, "%04x:%02x:%02x\n",
pci_domain_nr(slot->bus),
slot->bus->number,
slot->number);
}
static ssize_t bus_speed_read(enum pci_bus_speed speed, char *buf)
{
return sprintf(buf, "%s\n", pci_speed_string(speed));
return sysfs_emit(buf, "%s\n", pci_speed_string(speed));
}
static ssize_t max_speed_read_file(struct pci_slot *slot, char *buf)

18
drivers/pci/switch/switchtec.c
View File

@ -280,7 +280,7 @@ static ssize_t device_version_show(struct device *dev,
ver = ioread32(&stdev->mmio_sys_info->device_version);
return sprintf(buf, "%x\n", ver);
return sysfs_emit(buf, "%x\n", ver);
}
static DEVICE_ATTR_RO(device_version);
@ -292,7 +292,7 @@ static ssize_t fw_version_show(struct device *dev,
ver = ioread32(&stdev->mmio_sys_info->firmware_version);
return sprintf(buf, "%08x\n", ver);
return sysfs_emit(buf, "%08x\n", ver);
}
static DEVICE_ATTR_RO(fw_version);
@ -344,7 +344,7 @@ static ssize_t component_vendor_show(struct device *dev,
/* component_vendor field not supported after gen3 */
if (stdev->gen != SWITCHTEC_GEN3)
return sprintf(buf, "none\n");
return sysfs_emit(buf, "none\n");
return io_string_show(buf, &si->gen3.component_vendor,
sizeof(si->gen3.component_vendor));
@ -359,9 +359,9 @@ static ssize_t component_id_show(struct device *dev,
/* component_id field not supported after gen3 */
if (stdev->gen != SWITCHTEC_GEN3)
return sprintf(buf, "none\n");
return sysfs_emit(buf, "none\n");
return sprintf(buf, "PM%04X\n", id);
return sysfs_emit(buf, "PM%04X\n", id);
}
static DEVICE_ATTR_RO(component_id);
@ -373,9 +373,9 @@ static ssize_t component_revision_show(struct device *dev,
/* component_revision field not supported after gen3 */
if (stdev->gen != SWITCHTEC_GEN3)
return sprintf(buf, "255\n");
return sysfs_emit(buf, "255\n");
return sprintf(buf, "%d\n", rev);
return sysfs_emit(buf, "%d\n", rev);
}
static DEVICE_ATTR_RO(component_revision);
@ -384,7 +384,7 @@ static ssize_t partition_show(struct device *dev,
{
struct switchtec_dev *stdev = to_stdev(dev);
return sprintf(buf, "%d\n", stdev->partition);
return sysfs_emit(buf, "%d\n", stdev->partition);
}
static DEVICE_ATTR_RO(partition);
@ -393,7 +393,7 @@ static ssize_t partition_count_show(struct device *dev,
{
struct switchtec_dev *stdev = to_stdev(dev);
return sprintf(buf, "%d\n", stdev->partition_count);
return sysfs_emit(buf, "%d\n", stdev->partition_count);
}
static DEVICE_ATTR_RO(partition_count);