Merge remote-tracking branch 'remotes/vivier2/tags/trivial-branch-for-6.1-pull-request' into staging

Pull request trivial-branch 20210515

# gpg: Signature made Sat 15 May 2021 11:02:59 BST
# gpg:                using RSA key CD2F75DDC8E3A4DC2E4F5173F30C38BD3F2FBE3C
# gpg:                issuer "laurent@vivier.eu"
# gpg: Good signature from "Laurent Vivier <lvivier@redhat.com>" [full]
# gpg:                 aka "Laurent Vivier <laurent@vivier.eu>" [full]
# gpg:                 aka "Laurent Vivier (Red Hat) <lvivier@redhat.com>" [full]
# Primary key fingerprint: CD2F 75DD C8E3 A4DC 2E4F  5173 F30C 38BD 3F2F BE3C

* remotes/vivier2/tags/trivial-branch-for-6.1-pull-request:
  target/avr: Ignore unimplemented WDR opcode
  hw/avr/atmega.c: use the avr51 cpu for atmega1280
  target/sh4: Return error if CPUClass::get_phys_page_debug() fails
  multi-process: Avoid logical AND of mutually exclusive tests
  hw/pci-host: Do not build gpex-acpi.c if GPEX is not selected
  hw/mem/meson: Fix linking sparse-mem device with fuzzer
  cutils: fix memory leak in get_relocated_path()
  hw/rtc/mc146818rtc: Convert to 3-phase reset (Resettable interface)
  hw/timer/etraxfs_timer: Convert to 3-phase reset (Resettable interface)
  hw/gpio/aspeed: spelling fix (addtional)
  qapi: spelling fix (addtional)
  virtiofsd: Fix check of chown()'s return value
  virtio-net: Constify VirtIOFeature feature_sizes[]
  virtio-blk: Constify VirtIOFeature feature_sizes[]
  hw/virtio: Pass virtio_feature_get_config_size() a const argument
  backends/tpm: Replace qemu_mutex_lock calls with QEMU_LOCK_GUARD

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

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,