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hidapi/linux: retry hid_send_feature_report() if the ioctl() fails with EPIPE (e.g. the device stalled) 

Signed-off-by: Sam Lantinga <slouken@libsdl.org>
main
Sam Lantinga 2023-05-25 17:11:18 -07:00
parent 7c65c9d411
commit b35d813ebb
1 changed files with 12 additions and 3 deletions
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15
src/hidapi/linux/hid.c
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@ -1176,14 +1176,23 @@ int HID_API_EXPORT hid_set_nonblocking(hid_device *dev, int nonblock)
int HID_API_EXPORT hid_send_feature_report(hid_device *dev, const unsigned char *data, size_t length)
{
static const int MAX_RETRIES = 50;
int retry;
int res;
register_device_error(dev, NULL);
res = ioctl(dev->device_handle, HIDIOCSFEATURE(length), data);
if (res < 0)
register_device_error_format(dev, "ioctl (SFEATURE): %s", strerror(errno));
for (retry = 0; retry < MAX_RETRIES; ++retry) {
res = ioctl(dev->device_handle, HIDIOCSFEATURE(length), data);
if (res < 0 && errno == EPIPE) {
/* Try again... */
continue;
}
if (res < 0)
register_device_error_format(dev, "ioctl (SFEATURE): %s", strerror(errno));
break;
}
return res;
}