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Code Issues Releases Wiki Activity

ch341a_spi: replace active kernel driver detaching by automatic one

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Let libusb_claim_interface() handle the kernel driver detaching for us
by allowing automatic kernel driver detachment. Allow this on all
platforms.

Change-Id: If6f19744503055ab8e22c863b31e696808e0407d
Signed-off-by: Thomas Heijligen <thomas.heijligen@secunet.de>
Reviewed-on: https://review.coreboot.org/c/flashrom/+/57889
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>
This commit is contained in:
Thomas Heijligen 2021-09-23 19:06:47 +02:00 committed by Nico Huber
parent c99945d962
commit 61181a72a4
1 changed files with 4 additions and 11 deletions
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15
ch341a_spi.c
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@ -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 +447,11 @@ static int ch341a_spi_init(void)
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
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) {
msg_pwarn("Failed to detach kernel driver: '%s'. Further accesses will probably fail.\n",
libusb_error_name(ret));
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 of the interface may fail.\n");
}
#endif
ret = libusb_claim_interface(handle, 0);
if (ret != 0) {