Merge "Handle failed usb/reads and writes correctly"

This commit is contained in:
Treehugger Robot 2019-04-16 23:03:17 +00:00 committed by Gerrit Code Review
commit 6e28863442

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@ -257,7 +257,7 @@ ssize_t ClientUsbTransport::Read(void* data, size_t len) {
auto bytes_to_read = std::min(len - bytes_read_total, kFbFfsNumBufs * kFbFfsBufSize);
auto bytes_read_now = handle_->read(handle_.get(), char_data, bytes_to_read);
if (bytes_read_now < 0) {
return bytes_read_total;
return bytes_read_total == 0 ? -1 : bytes_read_total;
}
bytes_read_total += bytes_read_now;
char_data += bytes_read_now;
@ -278,7 +278,7 @@ ssize_t ClientUsbTransport::Write(const void* data, size_t len) {
auto bytes_to_write = std::min(len - bytes_written_total, kFbFfsNumBufs * kFbFfsBufSize);
auto bytes_written_now = handle_->write(handle_.get(), data, bytes_to_write);
if (bytes_written_now < 0) {
return bytes_written_total;
return bytes_written_total == 0 ? -1 : bytes_written_total;
}
bytes_written_total += bytes_written_now;
char_data += bytes_written_now;