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lib: only re-attach Kernel driver if it was attached previously

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This commit is contained in:
Steve Markgraf 2024-12-15 01:14:03 +01:00
parent ccd8727801
commit 23da9c64dd
1 changed files with 6 additions and 12 deletions
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18
src/libhsdaoh.c
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@ -81,7 +81,7 @@ struct hsdaoh_dev {
/* status */
int dev_lost;
int driver_active;
bool driver_active;
unsigned int xfer_errors;
char manufact[256];
char product[256];
@ -368,6 +368,7 @@ int hsdaoh_clear_endpoint_halt(hsdaoh_dev_t *dev)
int r;
if (libusb_kernel_driver_active(dev->devh, 1) == 1) {
dev->driver_active = true;
r = libusb_detach_kernel_driver(dev->devh, 1);
if (r < 0) {
fprintf(stderr, "Failed to detach UVC Kernel driver: %d\n", r);
@ -443,12 +444,6 @@ int hsdaoh_open(hsdaoh_dev_t **out_dev, uint32_t index)
return -1;
}
#if LIBUSB_API_VERSION >= 0x01000106
libusb_set_option(dev->ctx, LIBUSB_OPTION_LOG_LEVEL, 3);
#else
libusb_set_debug(dev->ctx, 3);
#endif
dev->dev_lost = 1;
cnt = libusb_get_device_list(dev->ctx, &list);
@ -495,7 +490,7 @@ int hsdaoh_open(hsdaoh_dev_t **out_dev, uint32_t index)
dev->hid_interface = 4;
if (libusb_kernel_driver_active(dev->devh, dev->hid_interface) == 1) {
dev->driver_active = true;
r = libusb_detach_kernel_driver(dev->devh, dev->hid_interface);
if (r < 0) {
fprintf(stderr, "Failed to detach HID Kernel driver: %d\n", r);
@ -535,11 +530,10 @@ int hsdaoh_close(hsdaoh_dev_t *dev)
libusb_release_interface(dev->devh, dev->hid_interface);
//TODO: only re-attach kernel driver if it was attached previously
if (!libusb_attach_kernel_driver(dev->devh, 4))
fprintf(stderr, "Reattached kernel driver\n");
else
if (dev->driver_active) {
if (libusb_attach_kernel_driver(dev->devh, 1) && libusb_attach_kernel_driver(dev->devh, 4))
fprintf(stderr, "Reattaching kernel driver failed!\n");
}
uvc_close(dev->uvc_devh);
uvc_unref_device(dev->uvc_dev);