[flashrom-gerrit] Change in flashrom[master]: ch341a_spi.c: Reset device before use

[Arthur Heymans (Code Review)]

Arthur Heymans has uploaded this change for review. ( https://review.coreboot.org/c/flashrom/+/63258 )

Change subject: ch341a_spi.c: Reset device before use
......................................................................

ch341a_spi.c: Reset device before use

This fixes the device being unusable, due to failed LIBUSB transfers
after flashrom is interrupted.

Change-Id: Iff824c22dc871bb2d9504abe8b5ad4e4c191c4af
Signed-off-by: Arthur Heymans 
---
M ch341a_spi.c
1 file changed, 7 insertions(+), 1 deletion(-)

git pull ssh://review.coreboot.org:29418/flashrom refs/changes/58/63258/1

diff --git a/ch341a_spi.c b/ch341a_spi.c
index bc4112b..b42254b 100644
--- a/ch341a_spi.c
+++ b/ch341a_spi.c
@@ -447,8 +447,14 @@
    	return -1;
    }

-	ret = libusb_set_auto_detach_kernel_driver(handle, 1);
+	/* Reset device state to known good state. */
+        ret = libusb_reset_device(handle);
    if (ret != 0) {
+		msg_pwarn("Unable to reset device.\n");
+	}
+
+	ret = libusb_set_auto_detach_kernel_driver(handle, 1);
+        if (ret != 0) {
    	msg_pwarn("Platform does not support detaching of USB kernel drivers.\n"
    		  "If an unsupported driver is active, claiming the interface may fail.\n");
    }