diff options
| -rw-r--r-- | backends/tpm/tpm_emulator.c | 34 |
1 files changed, 15 insertions, 19 deletions
diff --git a/backends/tpm/tpm_emulator.c b/backends/tpm/tpm_emulator.c index a012adc193..e5f1063ab6 100644 --- a/backends/tpm/tpm_emulator.c +++ b/backends/tpm/tpm_emulator.c @@ -30,6 +30,7 @@ #include "qemu/error-report.h" #include "qemu/module.h" #include "qemu/sockets.h" +#include "qemu/lockable.h" #include "io/channel-socket.h" #include "sysemu/tpm_backend.h" #include "sysemu/tpm_util.h" @@ -124,31 +125,26 @@ static int tpm_emulator_ctrlcmd(TPMEmulator *tpm, unsigned long cmd, void *msg, uint32_t cmd_no = cpu_to_be32(cmd); ssize_t n = sizeof(uint32_t) + msg_len_in; uint8_t *buf = NULL; - int ret = -1; - qemu_mutex_lock(&tpm->mutex); + WITH_QEMU_LOCK_GUARD(&tpm->mutex) { + buf = g_alloca(n); + memcpy(buf, &cmd_no, sizeof(cmd_no)); + memcpy(buf + sizeof(cmd_no), msg, msg_len_in); - buf = g_alloca(n); - memcpy(buf, &cmd_no, sizeof(cmd_no)); - memcpy(buf + sizeof(cmd_no), msg, msg_len_in); - - n = qemu_chr_fe_write_all(dev, buf, n); - if (n <= 0) { - goto end; - } - - if (msg_len_out != 0) { - n = qemu_chr_fe_read_all(dev, msg, msg_len_out); + n = qemu_chr_fe_write_all(dev, buf, n); if (n <= 0) { - goto end; + return -1; } - } - ret = 0; + if (msg_len_out != 0) { + n = qemu_chr_fe_read_all(dev, msg, msg_len_out); + if (n <= 0) { + return -1; + } + } + } -end: - qemu_mutex_unlock(&tpm->mutex); - return ret; + return 0; } static int tpm_emulator_unix_tx_bufs(TPMEmulator *tpm_emu, |