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path: root/drivers/usb/core/devices.c
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Diffstat (limited to 'drivers/usb/core/devices.c')
-rw-r--r--drivers/usb/core/devices.c154
1 files changed, 82 insertions, 72 deletions
diff --git a/drivers/usb/core/devices.c b/drivers/usb/core/devices.c
index 87c794d60aa..83d9dc379d9 100644
--- a/drivers/usb/core/devices.c
+++ b/drivers/usb/core/devices.c
@@ -89,7 +89,7 @@ static const char *format_string_serialnumber =
static const char *format_bandwidth =
/* B: Alloc=ddd/ddd us (xx%), #Int=ddd, #Iso=ddd */
"B: Alloc=%3d/%3d us (%2d%%), #Int=%3d, #Iso=%3d\n";
-
+
static const char *format_device1 =
/* D: Ver=xx.xx Cls=xx(sssss) Sub=xx Prot=xx MxPS=dd #Cfgs=dd */
"D: Ver=%2x.%02x Cls=%02x(%-5s) Sub=%02x Prot=%02x MxPS=%2d #Cfgs=%3d\n";
@@ -101,7 +101,7 @@ static const char *format_device2 =
static const char *format_config =
/* C: #Ifs=dd Cfg#=dd Atr=xx MPwr=dddmA */
"C:%c #Ifs=%2d Cfg#=%2d Atr=%02x MxPwr=%3dmA\n";
-
+
static const char *format_iad =
/* A: FirstIf#=dd IfCount=dd Cls=xx(sssss) Sub=xx Prot=xx */
"A: FirstIf#=%2d IfCount=%2d Cls=%02x(%-5s) Sub=%02x Prot=%02x\n";
@@ -122,7 +122,7 @@ static const char *format_endpt =
*/
static DECLARE_WAIT_QUEUE_HEAD(deviceconndiscwq);
-static unsigned int conndiscevcnt = 0;
+static unsigned int conndiscevcnt;
/* this struct stores the poll state for <mountpoint>/devices pollers */
struct usb_device_status {
@@ -172,12 +172,8 @@ static const char *class_decode(const int class)
return clas_info[ix].class_name;
}
-static char *usb_dump_endpoint_descriptor(
- int speed,
- char *start,
- char *end,
- const struct usb_endpoint_descriptor *desc
-)
+static char *usb_dump_endpoint_descriptor(int speed, char *start, char *end,
+ const struct usb_endpoint_descriptor *desc)
{
char dir, unit, *type;
unsigned interval, bandwidth = 1;
@@ -235,22 +231,24 @@ static char *usb_dump_endpoint_descriptor(
start += sprintf(start, format_endpt, desc->bEndpointAddress, dir,
desc->bmAttributes, type,
- (le16_to_cpu(desc->wMaxPacketSize) & 0x07ff) * bandwidth,
+ (le16_to_cpu(desc->wMaxPacketSize) & 0x07ff) *
+ bandwidth,
interval, unit);
return start;
}
static char *usb_dump_interface_descriptor(char *start, char *end,
- const struct usb_interface_cache *intfc,
- const struct usb_interface *iface,
- int setno)
+ const struct usb_interface_cache *intfc,
+ const struct usb_interface *iface,
+ int setno)
{
- const struct usb_interface_descriptor *desc = &intfc->altsetting[setno].desc;
+ const struct usb_interface_descriptor *desc;
const char *driver_name = "";
int active = 0;
if (start > end)
return start;
+ desc = &intfc->altsetting[setno].desc;
if (iface) {
driver_name = (iface->dev.driver
? iface->dev.driver->name
@@ -270,14 +268,10 @@ static char *usb_dump_interface_descriptor(char *start, char *end,
return start;
}
-static char *usb_dump_interface(
- int speed,
- char *start,
- char *end,
- const struct usb_interface_cache *intfc,
- const struct usb_interface *iface,
- int setno
-) {
+static char *usb_dump_interface(int speed, char *start, char *end,
+ const struct usb_interface_cache *intfc,
+ const struct usb_interface *iface, int setno)
+{
const struct usb_host_interface *desc = &intfc->altsetting[setno];
int i;
@@ -292,7 +286,7 @@ static char *usb_dump_interface(
}
static char *usb_dump_iad_descriptor(char *start, char *end,
- const struct usb_interface_assoc_descriptor *iad)
+ const struct usb_interface_assoc_descriptor *iad)
{
if (start > end)
return start;
@@ -311,13 +305,15 @@ static char *usb_dump_iad_descriptor(char *start, char *end,
* 1. marking active interface altsettings (code lists all, but should mark
* which ones are active, if any)
*/
-
-static char *usb_dump_config_descriptor(char *start, char *end, const struct usb_config_descriptor *desc, int active)
+static char *usb_dump_config_descriptor(char *start, char *end,
+ const struct usb_config_descriptor *desc,
+ int active)
{
if (start > end)
return start;
start += sprintf(start, format_config,
- active ? '*' : ' ', /* mark active/actual/current cfg. */
+ /* mark active/actual/current cfg. */
+ active ? '*' : ' ',
desc->bNumInterfaces,
desc->bConfigurationValue,
desc->bmAttributes,
@@ -325,13 +321,8 @@ static char *usb_dump_config_descriptor(char *start, char *end, const struct usb
return start;
}
-static char *usb_dump_config (
- int speed,
- char *start,
- char *end,
- const struct usb_host_config *config,
- int active
-)
+static char *usb_dump_config(int speed, char *start, char *end,
+ const struct usb_host_config *config, int active)
{
int i, j;
struct usb_interface_cache *intfc;
@@ -339,7 +330,8 @@ static char *usb_dump_config (
if (start > end)
return start;
- if (!config) /* getting these some in 2.3.7; none in 2.3.6 */
+ if (!config)
+ /* getting these some in 2.3.7; none in 2.3.6 */
return start + sprintf(start, "(null Cfg. desc.)\n");
start = usb_dump_config_descriptor(start, end, &config->desc, active);
for (i = 0; i < USB_MAXIADS; i++) {
@@ -364,7 +356,8 @@ static char *usb_dump_config (
/*
* Dump the different USB descriptors.
*/
-static char *usb_dump_device_descriptor(char *start, char *end, const struct usb_device_descriptor *desc)
+static char *usb_dump_device_descriptor(char *start, char *end,
+ const struct usb_device_descriptor *desc)
{
u16 bcdUSB = le16_to_cpu(desc->bcdUSB);
u16 bcdDevice = le16_to_cpu(desc->bcdDevice);
@@ -374,7 +367,7 @@ static char *usb_dump_device_descriptor(char *start, char *end, const struct usb
start += sprintf(start, format_device1,
bcdUSB >> 8, bcdUSB & 0xff,
desc->bDeviceClass,
- class_decode (desc->bDeviceClass),
+ class_decode(desc->bDeviceClass),
desc->bDeviceSubClass,
desc->bDeviceProtocol,
desc->bMaxPacketSize0,
@@ -391,12 +384,14 @@ static char *usb_dump_device_descriptor(char *start, char *end, const struct usb
/*
* Dump the different strings that this device holds.
*/
-static char *usb_dump_device_strings(char *start, char *end, struct usb_device *dev)
+static char *usb_dump_device_strings(char *start, char *end,
+ struct usb_device *dev)
{
if (start > end)
return start;
if (dev->manufacturer)
- start += sprintf(start, format_string_manufacturer, dev->manufacturer);
+ start += sprintf(start, format_string_manufacturer,
+ dev->manufacturer);
if (start > end)
goto out;
if (dev->product)
@@ -405,7 +400,8 @@ static char *usb_dump_device_strings(char *start, char *end, struct usb_device *
goto out;
#ifdef ALLOW_SERIAL_NUMBER
if (dev->serial)
- start += sprintf(start, format_string_serialnumber, dev->serial);
+ start += sprintf(start, format_string_serialnumber,
+ dev->serial);
#endif
out:
return start;
@@ -417,12 +413,12 @@ static char *usb_dump_desc(char *start, char *end, struct usb_device *dev)
if (start > end)
return start;
-
+
start = usb_dump_device_descriptor(start, end, &dev->descriptor);
if (start > end)
return start;
-
+
start = usb_dump_device_strings(start, end, dev);
for (i = 0; i < dev->descriptor.bNumConfigurations; i++) {
@@ -439,7 +435,8 @@ static char *usb_dump_desc(char *start, char *end, struct usb_device *dev)
#ifdef PROC_EXTRA /* TBD: may want to add this code later */
-static char *usb_dump_hub_descriptor(char *start, char *end, const struct usb_hub_descriptor * desc)
+static char *usb_dump_hub_descriptor(char *start, char *end,
+ const struct usb_hub_descriptor *desc)
{
int leng = USB_DT_HUB_NONVAR_SIZE;
unsigned char *ptr = (unsigned char *)desc;
@@ -455,13 +452,16 @@ static char *usb_dump_hub_descriptor(char *start, char *end, const struct usb_hu
return start;
}
-static char *usb_dump_string(char *start, char *end, const struct usb_device *dev, char *id, int index)
+static char *usb_dump_string(char *start, char *end,
+ const struct usb_device *dev, char *id, int index)
{
if (start > end)
return start;
start += sprintf(start, "Interface:");
- if (index <= dev->maxstring && dev->stringindex && dev->stringindex[index])
- start += sprintf(start, "%s: %.100s ", id, dev->stringindex[index]);
+ if (index <= dev->maxstring && dev->stringindex &&
+ dev->stringindex[index])
+ start += sprintf(start, "%s: %.100s ", id,
+ dev->stringindex[index]);
return start;
}
@@ -476,8 +476,10 @@ static char *usb_dump_string(char *start, char *end, const struct usb_device *de
* file_offset - the offset into the devices file on completion
* The caller must own the device lock.
*/
-static ssize_t usb_device_dump(char __user **buffer, size_t *nbytes, loff_t *skip_bytes, loff_t *file_offset,
- struct usb_device *usbdev, struct usb_bus *bus, int level, int index, int count)
+static ssize_t usb_device_dump(char __user **buffer, size_t *nbytes,
+ loff_t *skip_bytes, loff_t *file_offset,
+ struct usb_device *usbdev, struct usb_bus *bus,
+ int level, int index, int count)
{
int chix;
int ret, cnt = 0;
@@ -485,17 +487,19 @@ static ssize_t usb_device_dump(char __user **buffer, size_t *nbytes, loff_t *ski
char *pages_start, *data_end, *speed;
unsigned int length;
ssize_t total_written = 0;
-
+
/* don't bother with anything else if we're not writing any data */
if (*nbytes <= 0)
return 0;
-
+
if (level > MAX_TOPO_LEVEL)
return 0;
- /* allocate 2^1 pages = 8K (on i386); should be more than enough for one device */
- if (!(pages_start = (char*) __get_free_pages(GFP_KERNEL,1)))
- return -ENOMEM;
-
+ /* allocate 2^1 pages = 8K (on i386);
+ * should be more than enough for one device */
+ pages_start = (char *)__get_free_pages(GFP_KERNEL, 1);
+ if (!pages_start)
+ return -ENOMEM;
+
if (usbdev->parent && usbdev->parent->devnum != -1)
parent_devnum = usbdev->parent->devnum;
/*
@@ -541,15 +545,16 @@ static ssize_t usb_device_dump(char __user **buffer, size_t *nbytes, loff_t *ski
bus->bandwidth_allocated, max,
(100 * bus->bandwidth_allocated + max / 2)
/ max,
- bus->bandwidth_int_reqs,
- bus->bandwidth_isoc_reqs);
-
+ bus->bandwidth_int_reqs,
+ bus->bandwidth_isoc_reqs);
+
}
- data_end = usb_dump_desc(data_end, pages_start + (2 * PAGE_SIZE) - 256, usbdev);
-
+ data_end = usb_dump_desc(data_end, pages_start + (2 * PAGE_SIZE) - 256,
+ usbdev);
+
if (data_end > (pages_start + (2 * PAGE_SIZE) - 256))
data_end += sprintf(data_end, "(truncated)\n");
-
+
length = data_end - pages_start;
/* if we can start copying some data to the user */
if (length > *skip_bytes) {
@@ -567,17 +572,18 @@ static ssize_t usb_device_dump(char __user **buffer, size_t *nbytes, loff_t *ski
*skip_bytes = 0;
} else
*skip_bytes -= length;
-
+
free_pages((unsigned long)pages_start, 1);
-
+
/* Now look at all of this device's children. */
for (chix = 0; chix < usbdev->maxchild; chix++) {
struct usb_device *childdev = usbdev->children[chix];
if (childdev) {
usb_lock_device(childdev);
- ret = usb_device_dump(buffer, nbytes, skip_bytes, file_offset, childdev,
- bus, level + 1, chix, ++cnt);
+ ret = usb_device_dump(buffer, nbytes, skip_bytes,
+ file_offset, childdev, bus,
+ level + 1, chix, ++cnt);
usb_unlock_device(childdev);
if (ret == -EFAULT)
return total_written;
@@ -587,7 +593,8 @@ static ssize_t usb_device_dump(char __user **buffer, size_t *nbytes, loff_t *ski
return total_written;
}
-static ssize_t usb_device_read(struct file *file, char __user *buf, size_t nbytes, loff_t *ppos)
+static ssize_t usb_device_read(struct file *file, char __user *buf,
+ size_t nbytes, loff_t *ppos)
{
struct usb_bus *bus;
ssize_t ret, total_written = 0;
@@ -607,7 +614,8 @@ static ssize_t usb_device_read(struct file *file, char __user *buf, size_t nbyte
if (!bus->root_hub)
continue;
usb_lock_device(bus->root_hub);
- ret = usb_device_dump(&buf, &nbytes, &skip_bytes, ppos, bus->root_hub, bus, 0, 0, 0);
+ ret = usb_device_dump(&buf, &nbytes, &skip_bytes, ppos,
+ bus->root_hub, bus, 0, 0, 0);
usb_unlock_device(bus->root_hub);
if (ret < 0) {
mutex_unlock(&usb_bus_list_lock);
@@ -620,7 +628,8 @@ static ssize_t usb_device_read(struct file *file, char __user *buf, size_t nbyte
}
/* Kernel lock for "lastev" protection */
-static unsigned int usb_device_poll(struct file *file, struct poll_table_struct *wait)
+static unsigned int usb_device_poll(struct file *file,
+ struct poll_table_struct *wait)
{
struct usb_device_status *st = file->private_data;
unsigned int mask = 0;
@@ -629,7 +638,8 @@ static unsigned int usb_device_poll(struct file *file, struct poll_table_struct
if (!st) {
st = kmalloc(sizeof(struct usb_device_status), GFP_KERNEL);
- /* we may have dropped BKL - need to check for having lost the race */
+ /* we may have dropped BKL -
+ * need to check for having lost the race */
if (file->private_data) {
kfree(st);
st = file->private_data;
@@ -652,7 +662,7 @@ static unsigned int usb_device_poll(struct file *file, struct poll_table_struct
}
lost_race:
if (file->f_mode & FMODE_READ)
- poll_wait(file, &deviceconndiscwq, wait);
+ poll_wait(file, &deviceconndiscwq, wait);
if (st->lastev != conndiscevcnt)
mask |= POLLIN;
st->lastev = conndiscevcnt;
@@ -662,18 +672,18 @@ lost_race:
static int usb_device_open(struct inode *inode, struct file *file)
{
- file->private_data = NULL;
- return 0;
+ file->private_data = NULL;
+ return 0;
}
static int usb_device_release(struct inode *inode, struct file *file)
{
kfree(file->private_data);
file->private_data = NULL;
- return 0;
+ return 0;
}
-static loff_t usb_device_lseek(struct file * file, loff_t offset, int orig)
+static loff_t usb_device_lseek(struct file *file, loff_t offset, int orig)
{
loff_t ret;
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-09 19:33:16 +0000