summaryrefslogtreecommitdiffstats
path: root/drivers/usb/core
diff options
context:
space:
mode:
authorKay Sievers <kay.sievers@vrfy.org>2007-08-14 15:15:12 +0200
committerGreg Kroah-Hartman <gregkh@suse.de>2007-10-12 14:51:01 -0700
commit7eff2e7a8b65c25920207324e56611150eb1cd9a (patch)
tree02a0eeba9d25d996233e30c18f258dfae0ae2139 /drivers/usb/core
parent8380770c842faef3001e44662953d64ad9a93663 (diff)
downloadop-kernel-dev-7eff2e7a8b65c25920207324e56611150eb1cd9a.zip
op-kernel-dev-7eff2e7a8b65c25920207324e56611150eb1cd9a.tar.gz
Driver core: change add_uevent_var to use a struct
This changes the uevent buffer functions to use a struct instead of a long list of parameters. It does no longer require the caller to do the proper buffer termination and size accounting, which is currently wrong in some places. It fixes a known bug where parts of the uevent environment are overwritten because of wrong index calculations. Many thanks to Mathieu Desnoyers for finding bugs and improving the error handling. Signed-off-by: Kay Sievers <kay.sievers@vrfy.org> Cc: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> Cc: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/core')
-rw-r--r--drivers/usb/core/driver.c29
-rw-r--r--drivers/usb/core/message.c28
2 files changed, 14 insertions, 43 deletions
diff --git a/drivers/usb/core/driver.c b/drivers/usb/core/driver.c
index 63b1243..6273a51 100644
--- a/drivers/usb/core/driver.c
+++ b/drivers/usb/core/driver.c
@@ -576,12 +576,9 @@ static int usb_device_match(struct device *dev, struct device_driver *drv)
}
#ifdef CONFIG_HOTPLUG
-static int usb_uevent(struct device *dev, char **envp, int num_envp,
- char *buffer, int buffer_size)
+static int usb_uevent(struct device *dev, struct kobj_uevent_env *env)
{
struct usb_device *usb_dev;
- int i = 0;
- int length = 0;
if (!dev)
return -ENODEV;
@@ -610,51 +607,39 @@ static int usb_uevent(struct device *dev, char **envp, int num_envp,
* all the device descriptors we don't tell them about. Or
* act as usermode drivers.
*/
- if (add_uevent_var(envp, num_envp, &i,
- buffer, buffer_size, &length,
- "DEVICE=/proc/bus/usb/%03d/%03d",
+ if (add_uevent_var(env, "DEVICE=/proc/bus/usb/%03d/%03d",
usb_dev->bus->busnum, usb_dev->devnum))
return -ENOMEM;
#endif
/* per-device configurations are common */
- if (add_uevent_var(envp, num_envp, &i,
- buffer, buffer_size, &length,
- "PRODUCT=%x/%x/%x",
+ if (add_uevent_var(env, "PRODUCT=%x/%x/%x",
le16_to_cpu(usb_dev->descriptor.idVendor),
le16_to_cpu(usb_dev->descriptor.idProduct),
le16_to_cpu(usb_dev->descriptor.bcdDevice)))
return -ENOMEM;
/* class-based driver binding models */
- if (add_uevent_var(envp, num_envp, &i,
- buffer, buffer_size, &length,
- "TYPE=%d/%d/%d",
+ if (add_uevent_var(env, "TYPE=%d/%d/%d",
usb_dev->descriptor.bDeviceClass,
usb_dev->descriptor.bDeviceSubClass,
usb_dev->descriptor.bDeviceProtocol))
return -ENOMEM;
- if (add_uevent_var(envp, num_envp, &i,
- buffer, buffer_size, &length,
- "BUSNUM=%03d",
+ if (add_uevent_var(env, "BUSNUM=%03d",
usb_dev->bus->busnum))
return -ENOMEM;
- if (add_uevent_var(envp, num_envp, &i,
- buffer, buffer_size, &length,
- "DEVNUM=%03d",
+ if (add_uevent_var(env, "DEVNUM=%03d",
usb_dev->devnum))
return -ENOMEM;
- envp[i] = NULL;
return 0;
}
#else
-static int usb_uevent(struct device *dev, char **envp,
- int num_envp, char *buffer, int buffer_size)
+static int usb_uevent(struct device *dev, struct kobj_uevent_env *env)
{
return -ENODEV;
}
diff --git a/drivers/usb/core/message.c b/drivers/usb/core/message.c
index d8f7b08..95a49d8 100644
--- a/drivers/usb/core/message.c
+++ b/drivers/usb/core/message.c
@@ -1339,14 +1339,11 @@ void usb_release_interface(struct device *dev)
}
#ifdef CONFIG_HOTPLUG
-static int usb_if_uevent(struct device *dev, char **envp, int num_envp,
- char *buffer, int buffer_size)
+static int usb_if_uevent(struct device *dev, struct kobj_uevent_env *env)
{
struct usb_device *usb_dev;
struct usb_interface *intf;
struct usb_host_interface *alt;
- int i = 0;
- int length = 0;
if (!dev)
return -ENODEV;
@@ -1359,39 +1356,30 @@ static int usb_if_uevent(struct device *dev, char **envp, int num_envp,
alt = intf->cur_altsetting;
#ifdef CONFIG_USB_DEVICEFS
- if (add_uevent_var(envp, num_envp, &i,
- buffer, buffer_size, &length,
- "DEVICE=/proc/bus/usb/%03d/%03d",
+ if (add_uevent_var(env, "DEVICE=/proc/bus/usb/%03d/%03d",
usb_dev->bus->busnum, usb_dev->devnum))
return -ENOMEM;
#endif
- if (add_uevent_var(envp, num_envp, &i,
- buffer, buffer_size, &length,
- "PRODUCT=%x/%x/%x",
+ if (add_uevent_var(env, "PRODUCT=%x/%x/%x",
le16_to_cpu(usb_dev->descriptor.idVendor),
le16_to_cpu(usb_dev->descriptor.idProduct),
le16_to_cpu(usb_dev->descriptor.bcdDevice)))
return -ENOMEM;
- if (add_uevent_var(envp, num_envp, &i,
- buffer, buffer_size, &length,
- "TYPE=%d/%d/%d",
+ if (add_uevent_var(env, "TYPE=%d/%d/%d",
usb_dev->descriptor.bDeviceClass,
usb_dev->descriptor.bDeviceSubClass,
usb_dev->descriptor.bDeviceProtocol))
return -ENOMEM;
- if (add_uevent_var(envp, num_envp, &i,
- buffer, buffer_size, &length,
- "INTERFACE=%d/%d/%d",
+ if (add_uevent_var(env, "INTERFACE=%d/%d/%d",
alt->desc.bInterfaceClass,
alt->desc.bInterfaceSubClass,
alt->desc.bInterfaceProtocol))
return -ENOMEM;
- if (add_uevent_var(envp, num_envp, &i,
- buffer, buffer_size, &length,
+ if (add_uevent_var(env,
"MODALIAS=usb:v%04Xp%04Xd%04Xdc%02Xdsc%02Xdp%02Xic%02Xisc%02Xip%02X",
le16_to_cpu(usb_dev->descriptor.idVendor),
le16_to_cpu(usb_dev->descriptor.idProduct),
@@ -1404,14 +1392,12 @@ static int usb_if_uevent(struct device *dev, char **envp, int num_envp,
alt->desc.bInterfaceProtocol))
return -ENOMEM;
- envp[i] = NULL;
return 0;
}
#else
-static int usb_if_uevent(struct device *dev, char **envp,
- int num_envp, char *buffer, int buffer_size)
+static int usb_if_uevent(struct device *dev, struct kobj_uevent_env *env)
{
return -ENODEV;
}
OpenPOWER on IntegriCloud