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hw/usb: Use lock guard macros 

Use qemu LOCK_GUARD macros from "qemu/lockable.h" in
hw/usb/ccid-card-emulated.c, saves manual unlock calls.

Signed-off-by: Amey Narkhede <ameynarkhede03@gmail.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-id: 20200923134327.576139-1-ameynarkhede03@gmail.com
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Amey Narkhede 2020-09-23 19:13:27 +05:30 committed by Gerd Hoffmann
parent f00ff136ee
commit 5c43b603a2
1 changed files with 27 additions and 27 deletions
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54
hw/usb/ccid-card-emulated.c
View File

@ -30,6 +30,7 @@
#include <libcacard.h>
#include "qemu/thread.h"
#include "qemu/lockable.h"
#include "qemu/main-loop.h"
#include "qemu/module.h"
#include "ccid.h"
@ -244,34 +245,34 @@ static void *handle_apdu_thread(void* arg)
card->quit_apdu_thread = 0; /* debugging */
break;
}
qemu_mutex_lock(&card->vreader_mutex);
while (!QSIMPLEQ_EMPTY(&card->guest_apdu_list)) {
event = QSIMPLEQ_FIRST(&card->guest_apdu_list);
assert((unsigned long)event > 1000);
QSIMPLEQ_REMOVE_HEAD(&card->guest_apdu_list, entry);
if (event->p.data.type != EMUL_GUEST_APDU) {
DPRINTF(card, 1, "unexpected message in handle_apdu_thread\n");
WITH_QEMU_LOCK_GUARD(&card->vreader_mutex) {
while (!QSIMPLEQ_EMPTY(&card->guest_apdu_list)) {
event = QSIMPLEQ_FIRST(&card->guest_apdu_list);
assert((unsigned long)event > 1000);
QSIMPLEQ_REMOVE_HEAD(&card->guest_apdu_list, entry);
if (event->p.data.type != EMUL_GUEST_APDU) {
DPRINTF(card, 1, "unexpected message in handle_apdu_thread\n");
g_free(event);
continue;
}
if (card->reader == NULL) {
DPRINTF(card, 1, "reader is NULL\n");
g_free(event);
continue;
}
recv_len = sizeof(recv_data);
reader_status = vreader_xfr_bytes(card->reader,
event->p.data.data, event->p.data.len,
recv_data, &recv_len);
DPRINTF(card, 2, "got back apdu of length %d\n", recv_len);
if (reader_status == VREADER_OK) {
emulated_push_response_apdu(card, recv_data, recv_len);
} else {
emulated_push_error(card, reader_status);
}
g_free(event);
continue;
}
if (card->reader == NULL) {
DPRINTF(card, 1, "reader is NULL\n");
g_free(event);
continue;
}
recv_len = sizeof(recv_data);
reader_status = vreader_xfr_bytes(card->reader,
event->p.data.data, event->p.data.len,
recv_data, &recv_len);
DPRINTF(card, 2, "got back apdu of length %d\n", recv_len);
if (reader_status == VREADER_OK) {
emulated_push_response_apdu(card, recv_data, recv_len);
} else {
emulated_push_error(card, reader_status);
}
g_free(event);
}
qemu_mutex_unlock(&card->vreader_mutex);
}
return NULL;
}
@ -365,7 +366,7 @@ static void card_event_handler(EventNotifier *notifier)
EmulEvent *event, *next;
event_notifier_test_and_clear(&card->notifier);
qemu_mutex_lock(&card->event_list_mutex);
QEMU_LOCK_GUARD(&card->event_list_mutex);
QSIMPLEQ_FOREACH_SAFE(event, &card->event_list, entry, next) {
DPRINTF(card, 2, "event %s\n", emul_event_to_string(event->p.gen.type));
switch (event->p.gen.type) {
@ -398,7 +399,6 @@ static void card_event_handler(EventNotifier *notifier)
g_free(event);
}
QSIMPLEQ_INIT(&card->event_list);
qemu_mutex_unlock(&card->event_list_mutex);
}
static int init_event_notifier(EmulatedState *card, Error **errp)