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Reset the number of bytes to zero on error

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The hidapi read and write functions return a negative value if an error
occurs. Those negative values should not be returned to the caller as
the actual number of bytes (or used in the logging). The value is reset
to zero instead.
This commit is contained in:
Jef Driesen 2017-07-11 09:52:40 +02:00
parent d251b373be
commit b82d5fcfff
1 changed files with 2 additions and 0 deletions
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2
src/usbhid.c
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@ -362,6 +362,7 @@ dc_usbhid_read (dc_usbhid_t *usbhid, void *data, size_t size, size_t *actual)
if (nbytes < 0) {
ERROR (usbhid->context, "Usb read interrupt transfer failed.");
status = DC_STATUS_IO;
nbytes = 0;
goto out;
}
#endif
@ -422,6 +423,7 @@ dc_usbhid_write (dc_usbhid_t *usbhid, const void *data, size_t size, size_t *act
if (nbytes < 0) {
ERROR (usbhid->context, "Usb write interrupt transfer failed.");
status = DC_STATUS_IO;
nbytes = 0;
goto out;
}
#endif