Change in flashrom[master]: ch341a_spi: libusb functions can handle all platforms

[Thomas Heijligen (Code Review)]

Thomas Heijligen has uploaded this change for review. ( https://review.coreboot.org/c/flashrom/+/57889 )

Change subject: ch341a_spi: libusb functions can handle all platforms
......................................................................

ch341a_spi: libusb functions can handle all platforms

libusb_detach_kernel_driver() returns LIBUSB_ERROR_NOT_SUPPORTED on
unsupported platforms. That's fine. There is no need to call this
function only on Linux.

Change-Id: If6f19744503055ab8e22c863b31e696808e0407d
Signed-off-by: Thomas Heijligen 
---
M ch341a_spi.c
1 file changed, 3 insertions(+), 8 deletions(-)

git pull ssh://review.coreboot.org:29418/flashrom refs/changes/89/57889/1

diff --git a/ch341a_spi.c b/ch341a_spi.c
index 4a76286..43acaeb 100644
--- a/ch341a_spi.c
+++ b/ch341a_spi.c
@@ -20,7 +20,6 @@
 #include <string.h>
 #include <libusb.h>
 #include "flash.h"
-#include "platform.h"
 #include "programmer.h"

/* LIBUSB_CALL ensures the right calling conventions on libusb callbacks.
@@ -448,17 +447,13 @@
    	return -1;
    }

-/* libusb_detach_kernel_driver() and friends basically only work on Linux. We simply try to detach on Linux
- * without a lot of passion here. If that works fine else we will fail on claiming the interface anyway. */
-#if IS_LINUX
+/* libusb_detach_kernel_driver() is only available on linux. Other platforms return
+ * LIBUSB_ERROR_NOT_SUPPORTED. That's fine. */
    ret = libusb_detach_kernel_driver(handle, 0);
-	if (ret == LIBUSB_ERROR_NOT_SUPPORTED) {
-		msg_pwarn("Detaching kernel drivers is not supported. Further accesses may fail.\n");
-	} else if (ret != 0 && ret != LIBUSB_ERROR_NOT_FOUND) {
+	if (ret != 0 && ret != LIBUSB_ERROR_NOT_FOUND && ret != LIBUSB_ERROR_NOT_SUPPORTED) {
    	msg_pwarn("Failed to detach kernel driver: '%s'. Further accesses will probably fail.\n",
    		  libusb_error_name(ret));
    }
-#endif

ret = libusb_claim_interface(handle, 0);
    if (ret != 0) {