Signed-off-by: Hans de Goede <[email protected]>
---
libusb/os/linux_usbfs.c | 28 ++++++++++++++++++++++++++++
libusb/os/linux_usbfs.h | 10 ++++++++++
2 files changed, 38 insertions(+)
diff --git a/libusb/os/linux_usbfs.c b/libusb/os/linux_usbfs.c
index b6194ce..9cadca0 100644
--- a/libusb/os/linux_usbfs.c
+++ b/libusb/os/linux_usbfs.c
@@ -1604,9 +1604,37 @@ static int op_detach_kernel_driver_and_claim(
const char *driver_name)
{
int fd = _device_handle_priv(handle)->fd;
+ struct usbfs_disconnect_claim dc;
struct usbfs_getdriver getdrv;
int r;
+ dc.interface = interface;
+ if (driver_name) {
+ snprintf(dc.driver, sizeof(dc.driver), "%s", driver_name);
+ dc.flags = USBFS_DISCONNECT_CLAIM_IF_DRIVER;
+ } else {
+ snprintf(dc.driver, sizeof(dc.driver), "usbfs");
+ dc.flags = USBFS_DISCONNECT_CLAIM_EXCEPT_DRIVER;
+ }
+ r = ioctl(fd, IOCTL_USBFS_DISCONNECT_CLAIM, &dc);
+ if (r == 0 || (r != 0 && errno != ENOTTY)) {
+ if (r == 0)
+ return 0;
+ switch (errno) {
+ case EBUSY:
+ return LIBUSB_ERROR_BUSY;
+ case EINVAL:
+ return LIBUSB_ERROR_INVALID_PARAM;
+ case ENODEV:
+ return LIBUSB_ERROR_NO_DEVICE;
+ }
+
+ usbi_err(HANDLE_CTX(handle),
+ "disconnect-and-claim failed errno %d", errno);
+ return LIBUSB_ERROR_OTHER;
+ }
+
+ /* Fallback code for kernels which don't support the dc ioctl */
if (driver_name) {
getdrv.interface = interface;
r = ioctl(fd, IOCTL_USBFS_GETDRIVER, &getdrv);
diff --git a/libusb/os/linux_usbfs.h b/libusb/os/linux_usbfs.h
index 593e736..3ee80ff 100644
--- a/libusb/os/linux_usbfs.h
+++ b/libusb/os/linux_usbfs.h
@@ -123,6 +123,15 @@ struct usbfs_hub_portinfo {
#define USBFS_CAP_NO_PACKET_SIZE_LIM 0x04
#define USBFS_CAP_BULK_SCATTER_GATHER 0x08
+#define USBFS_DISCONNECT_CLAIM_IF_DRIVER 0x01
+#define USBFS_DISCONNECT_CLAIM_EXCEPT_DRIVER 0x02
+
+struct usbfs_disconnect_claim {
+ unsigned int interface;
+ unsigned int flags;
+ char driver[USBFS_MAXDRIVERNAME + 1];
+};
+
#define IOCTL_USBFS_CONTROL _IOWR('U', 0, struct usbfs_ctrltransfer)
#define IOCTL_USBFS_BULK _IOWR('U', 2, struct usbfs_bulktransfer)
#define IOCTL_USBFS_RESETEP _IOR('U', 3, unsigned int)
@@ -145,5 +154,6 @@ struct usbfs_hub_portinfo {
#define IOCTL_USBFS_CLAIM_PORT _IOR('U', 24, unsigned int)
#define IOCTL_USBFS_RELEASE_PORT _IOR('U', 25, unsigned int)
#define IOCTL_USBFS_GET_CAPABILITIES _IOR('U', 26, __u32)
+#define IOCTL_USBFS_DISCONNECT_CLAIM _IOR('U', 27, struct
usbfs_disconnect_claim)
#endif
--
1.7.11.4
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