Method continuousRead

BrcmPatchRAM/BrcmPatchRAM.cpp:1004–1048

}

bool BrcmPatchRAM::continuousRead()
{
    if (!mReadBuffer)
    {
        mReadBuffer = IOBufferMemoryDescriptor::inTaskWithOptions(kernel_task, 0, 0x200);
        if (!mReadBuffer)
        {
            AlwaysLog("[%04x:%04x]: continuousRead - failed to allocate read buffer.\n", mVendorId, mProductId);
            return false;
        }
#ifndef TARGET_ELCAPITAN
        mInterruptCompletion.target = this;
#else
        mInterruptCompletion.owner = this;
#endif
        mInterruptCompletion.action = readCompletion;
        mInterruptCompletion.parameter = NULL;
    }

    IOReturn result = mReadBuffer->prepare();
    if (result != kIOReturnSuccess)
    {
        AlwaysLog("[%04x:%04x]: continuousRead - failed to prepare buffer (0x%08x)\n", mVendorId, mProductId, result);
        return false;
    }

    if ((result = mInterruptPipe.read(mReadBuffer, 0, 0, mReadBuffer->getLength(), &mInterruptCompletion)) != kIOReturnSuccess)
    {
        AlwaysLog("[%04x:%04x]: continuousRead - Failed to queue read (0x%08x)\n", mVendorId, mProductId, result);

        if (result == kIOUSBPipeStalled)
        {
            mInterruptPipe.clearStall();
            result = mInterruptPipe.read(mReadBuffer, 0, 0, mReadBuffer->getLength(), &mInterruptCompletion);
            
            if (result != kIOReturnSuccess)
            {
                AlwaysLog("[%04x:%04x]: continuousRead - Failed, read dead (0x%08x)\n", mVendorId, mProductId, result);
                return false;
            }
        }
    }

    return true;
}

#ifndef TARGET_ELCAPITAN
void BrcmPatchRAM::readCompletion(void* target, void* parameter, IOReturn status, UInt32 bufferSizeRemaining)