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fix fetch data after low level bus error reap completed#1557

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maybetaken wants to merge1 commit intolibusb:master
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fix fetch data after low level bus error reap completed
Low level bus error reap completed is treated as LIBUSB_TRANSFER_ERRORThen it continues to fetch data, in some cases usb device is plugged outthen ioctl will hang servel ms for waiting device data. This committreats low level error and transfer completed as not required foranother reap thusing fixing waiting ioctl return.
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@maybetaken
maybetaken committedAug 29, 2024
commit29ba868f0ad6bd06c890eda95b92886c7504e749
8 changes: 6 additions & 2 deletionslibusb/os/linux_usbfs.c
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Original file line numberDiff line numberDiff line change
Expand Up@@ -2466,6 +2466,7 @@ static int handle_bulk_completion(struct usbi_transfer *itransfer,
}

cancel_remaining:
int prev_reap_status = tpriv->reap_status;
if (tpriv->reap_action == ERROR && tpriv->reap_status == LIBUSB_TRANSFER_COMPLETED)
tpriv->reap_status = LIBUSB_TRANSFER_ERROR;

Expand All@@ -2484,9 +2485,12 @@ static int handle_bulk_completion(struct usbi_transfer *itransfer,
free(tpriv->urbs);
tpriv->urbs = NULL;
usbi_mutex_unlock(&itransfer->lock);
return tpriv->reap_action == CANCELLED ?
usbi_handle_transfer_cancellation(itransfer) :

int r = tpriv->reap_action == CANCELLED ?usbi_handle_transfer_cancellation(itransfer) :
usbi_handle_transfer_completion(itransfer, tpriv->reap_status);

return tpriv->reap_action == ERROR && prev_reap_status == LIBUSB_TRANSFER_COMPLETED ?
1 : r;
}

static int handle_iso_completion(struct usbi_transfer *itransfer,
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