qdl: Skip ZLP on MacOS

libusb/libusb#678

Signed-off-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>

Author: quic-kdybcio

qdl/src/lib.rs

@@ -406,7 +406,7 @@ pub fn firehose_program_storage<T: Read + Write + FirehoseChan>(
     }
 
     // Send a Zero-Length Packet to indicate end of stream
-    if channel.fh_config().backend == QdlBackend::Usb {
+    if channel.fh_config().backend == QdlBackend::Usb && !channel.fh_config().skip_usb_zlp {
         let _ = channel.write(&[]).expect("Error sending ZLP");
     }
 

qdl/src/types.rs

@@ -60,6 +60,7 @@ pub struct FirehoseConfiguration {
     pub skip_write: bool,
 
     pub backend: QdlBackend,
+    pub skip_usb_zlp: bool,
     pub skip_firehose_log: bool,
     pub verbose_firehose: bool,
 }
@@ -76,6 +77,8 @@ impl Default for FirehoseConfiguration {
             read_back_verify: false,
             skip_write: true,
             backend: QdlBackend::default(),
+            // https://github.com/libusb/libusb/pull/678
+            skip_usb_zlp: cfg!(target_os = "macos"),
             skip_firehose_log: true,
             verbose_firehose: false,
         }