trivial patches for 2014-08-15

-----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1.4.12 (GNU/Linux)
 
 iQEcBAABAgAGBQJT7iN/AAoJEL7lnXSkw9fbgVcH/20bga0KUQ+FDMg7pr0jBK3J
 6d7DLwsmypEiKN8D7mQz/xDX4uwtWQu4PXERn8UEfE0xVrnNDGOYpYtj2kb7z3/T
 F33oosGHz9XKdhGg6x4ZLirhjJdVsj90SJ37D4haxFP5CeRjs8c3RFOekI0qwyXm
 /t+mDdWsADYaZ1WaFOo0kcNCROYudaRV2isubQFUqKgjWmIx+Y+2xSXtTWU3UAVx
 dDcEvTYdDNucor2kV1/F2iULHMXNOPjvvV59ARBkzTyaSday4waGptAOL9eQInSA
 DcJuRZwY2lpm1YuJN4b5UzZ849R3X9zA1vIW6aP+NcktLoKV/bu3qVwo0v5+LMs=
 =wZLU
 -----END PGP SIGNATURE-----

Merge remote-tracking branch 'remotes/mjt/tags/trivial-patches-2014-08-15' into staging

trivial patches for 2014-08-15

# gpg: Signature made Fri 15 Aug 2014 16:13:03 BST using RSA key ID A4C3D7DB
# gpg: Good signature from "Michael Tokarev <mjt@tls.msk.ru>"
# gpg:                 aka "Michael Tokarev <mjt@corpit.ru>"
# gpg:                 aka "Michael Tokarev <mjt@debian.org>"
# gpg: WARNING: This key is not certified with a trusted signature!
# gpg:          There is no indication that the signature belongs to the owner.
# Primary key fingerprint: 6EE1 95D1 886E 8FFB 810D  4324 457C E0A0 8044 65C5
#      Subkey fingerprint: 6F67 E18E 7C91 C5B1 5514  66A7 BEE5 9D74 A4C3 D7DB

* remotes/mjt/tags/trivial-patches-2014-08-15:
  ivshmem: check the value returned by fstat()
  l2cap: fix access to freed memory
  intc: i8259: Convert Array allocation to g_new0
  ppc: convert g_new(qemu_irq usages to g_new0
  ssi: xilinx_spi: Initialise CS GPIOs as NULL
  vl: free err
  qemu-options.hx: fix typo about l2tpv3
  vmxnet3: don't use 'Yoda conditions'
  vl: don't use 'Yoda conditions'
  spice: don't use 'Yoda conditions'
  don't use 'Yoda conditions'
  isa-bus: don't use 'Yoda conditions'
  audio: don't use 'Yoda conditions'
  usb: don't use 'Yoda conditions'
  CODING_STYLE: Section about conditional statement
  pci-host: update uncorresponding description
  pci-host: update obsolete reference about piix_pci.c
  qemu-options.hx: fix a typo of chardev
  memory: Update obsolete comment about AddrRange field type
  apic: Fix reported DFR content

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

CODING_STYLE

@@ -91,3 +91,17 @@ Mixed declarations (interleaving statements and declarations within blocks)
 are not allowed; declarations should be at the beginning of blocks.  In other
 words, the code should not generate warnings if using GCC's
 -Wdeclaration-after-statement option.
+
+6. Conditional statements
+
+When comparing a variable for (in)equality with a constant, list the
+constant on the right, as in:
+
+if (a == 1) {
+    /* Reads like: "If a equals 1" */
+    do_something();
+}
+
+Rationale: Yoda conditions (as in 'if (1 == a)') are awkward to read.
+Besides, good compilers already warn users when '==' is mis-typed as '=',
+even when the constant is on the right.

hw/audio/gus.c

@@ -212,7 +212,7 @@ static int GUS_read_DMA (void *opaque, int nchan, int dma_pos, int dma_len)
         pos += copied;
     }
 
-    if (0 == ((mode >> 4) & 1)) {
+    if (((mode >> 4) & 1) == 0) {
         DMA_release_DREQ (s->emu.gusdma);
     }
     return dma_len;

hw/audio/hda-codec.c

@@ -489,8 +489,9 @@ static int hda_audio_init(HDACodecDevice *hda, const struct desc_codec *desc)
     for (i = 0; i < a->desc->nnodes; i++) {
         node = a->desc->nodes + i;
         param = hda_codec_find_param(node, AC_PAR_AUDIO_WIDGET_CAP);
-        if (NULL == param)
+        if (param == NULL) {
             continue;
+        }
         type = (param->val & AC_WCAP_TYPE) >> AC_WCAP_TYPE_SHIFT;
         switch (type) {
         case AC_WID_AUD_OUT:

hw/audio/sb16.c

@@ -928,7 +928,7 @@ static IO_WRITE_PROTO (dsp_write)
 /*         if (s->highspeed) */
 /*             break; */
 
-        if (0 == s->needed_bytes) {
+        if (s->needed_bytes == 0) {
             command (s, val);
 #if 0
             if (0 == s->needed_bytes) {
@@ -1212,7 +1212,7 @@ static int SB_read_DMA (void *opaque, int nchan, int dma_pos, int dma_len)
 #endif
 
     if (till <= copy) {
-        if (0 == s->dma_auto) {
+        if (s->dma_auto == 0) {
             copy = till;
         }
     }
@@ -1224,7 +1224,7 @@ static int SB_read_DMA (void *opaque, int nchan, int dma_pos, int dma_len)
     if (s->left_till_irq <= 0) {
         s->mixer_regs[0x82] |= (nchan & 4) ? 2 : 1;
         qemu_irq_raise (s->pic);
-        if (0 == s->dma_auto) {
+        if (s->dma_auto == 0) {
             control (s, 0);
             speaker (s, 0);
         }

hw/bt/l2cap.c

@@ -429,7 +429,7 @@ static struct l2cap_chan_s *l2cap_channel_open(struct l2cap_instance_s *l2cap,
                 status = L2CAP_CS_NO_INFO;
             } else {
                 g_free(ch);
-
+                ch = NULL;
                 result = L2CAP_CR_NO_MEM;
                 status = L2CAP_CS_NO_INFO;
             }

hw/intc/apic.c

@@ -698,7 +698,7 @@ static uint32_t apic_mem_readl(void *opaque, hwaddr addr)
         val = s->log_dest << 24;
         break;
     case 0x0e:
-        val = s->dest_mode << 28;
+        val = (s->dest_mode << 28) | 0xfffffff;
         break;
     case 0x0f:
         val = s->spurious_vec;

hw/intc/i8259.c

@@ -472,7 +472,7 @@ qemu_irq *i8259_init(ISABus *bus, qemu_irq parent_irq)
     ISADevice *isadev;
     int i;
 
-    irq_set = g_malloc(ISA_NUM_IRQS * sizeof(qemu_irq));
+    irq_set = g_new0(qemu_irq, ISA_NUM_IRQS);
 
     isadev = i8259_init_chip(TYPE_I8259, bus, true);
     dev = DEVICE(isadev);

hw/intc/openpic.c

@@ -1627,7 +1627,7 @@ static void openpic_realize(DeviceState *dev, Error **errp)
     }
 
     for (i = 0; i < opp->nb_cpus; i++) {
-        opp->dst[i].irqs = g_new(qemu_irq, OPENPIC_OUTPUT_NB);
+        opp->dst[i].irqs = g_new0(qemu_irq, OPENPIC_OUTPUT_NB);
         for (j = 0; j < OPENPIC_OUTPUT_NB; j++) {
             sysbus_init_irq(d, &opp->dst[i].irqs[j]);
         }

hw/isa/isa-bus.c

@@ -50,7 +50,7 @@ ISABus *isa_bus_new(DeviceState *dev, MemoryRegion *address_space_io)
         fprintf(stderr, "Can't create a second ISA bus\n");
         return NULL;
     }
-    if (NULL == dev) {
+    if (!dev) {
         dev = qdev_create(NULL, "isabus-bridge");
         qdev_init_nofail(dev);
     }

hw/isa/lpc_ich9.c

@@ -7,7 +7,7 @@
  *               VA Linux Systems Japan K.K.
  * Copyright (C) 2012 Jason Baron <jbaron@redhat.com>
  *
- * This is based on piix_pci.c, but heavily modified.
+ * This is based on piix.c, but heavily modified.
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy
  * of this software and associated documentation files (the "Software"), to deal

hw/misc/ivshmem.c

@@ -324,7 +324,11 @@ static int check_shm_size(IVShmemState *s, int fd) {
 
     struct stat buf;
 
-    fstat(fd, &buf);
+    if (fstat(fd, &buf) < 0) {
+        fprintf(stderr, "ivshmem: exiting: fstat on fd %d failed: %s\n",
+                fd, strerror(errno));
+        return -1;
+    }
 
     if (s->ivshmem_size > buf.st_size) {
         fprintf(stderr,

hw/net/vmxnet3.c

@@ -1009,7 +1009,7 @@ vmxnet3_indicate_packet(VMXNET3State *s)
 
         vmxnet3_dump_rx_descr(&rxd);
 
-        if (0 != ready_rxcd_pa) {
+        if (ready_rxcd_pa != 0) {
             cpu_physical_memory_write(ready_rxcd_pa, &rxcd, sizeof(rxcd));
         }
 
@@ -1020,7 +1020,7 @@ vmxnet3_indicate_packet(VMXNET3State *s)
         rxcd.gen = new_rxcd_gen;
         rxcd.rqID = RXQ_IDX + rx_ridx * s->rxq_num;
 
-        if (0 == bytes_left) {
+        if (bytes_left == 0) {
             vmxnet3_rx_update_descr(s->rx_pkt, &rxcd);
         }
 
@@ -1038,16 +1038,16 @@ vmxnet3_indicate_packet(VMXNET3State *s)
         num_frags++;
     }
 
-    if (0 != ready_rxcd_pa) {
+    if (ready_rxcd_pa != 0) {
         rxcd.eop = 1;
-        rxcd.err = (0 != bytes_left);
+        rxcd.err = (bytes_left != 0);
         cpu_physical_memory_write(ready_rxcd_pa, &rxcd, sizeof(rxcd));
 
         /* Flush RX descriptor changes */
         smp_wmb();
     }
 
-    if (0 != new_rxcd_pa) {
+    if (new_rxcd_pa != 0) {
         vmxnet3_revert_rxc_descr(s, RXQ_IDX);
     }
 
@@ -1190,8 +1190,8 @@ static void vmxnet3_update_mcast_filters(VMXNET3State *s)
     s->mcast_list_len = list_bytes / sizeof(s->mcast_list[0]);
 
     s->mcast_list = g_realloc(s->mcast_list, list_bytes);
-    if (NULL == s->mcast_list) {
+    if (!s->mcast_list) {
-        if (0 == s->mcast_list_len) {
+        if (s->mcast_list_len == 0) {
             VMW_CFPRN("Current multicast list is empty");
         } else {
             VMW_ERPRN("Failed to allocate multicast list of %d elements",
@@ -1667,7 +1667,7 @@ vmxnet3_io_bar1_write(void *opaque,
          * memory address. We save it to temp variable and set the
          * shared address only after we get the high part
          */
-        if (0 == val) {
+        if (val == 0) {
             s->device_active = false;
         }
         s->temp_shared_guest_driver_memory = val;

hw/pci-host/pam.c

@@ -1,12 +1,12 @@
 /*
- * QEMU i440FX/PIIX3 PCI Bridge Emulation
+ * QEMU Smram/pam logic implementation
  *
  * Copyright (c) 2006 Fabrice Bellard
  * Copyright (c) 2011 Isaku Yamahata <yamahata at valinux co jp>
  *                    VA Linux Systems Japan K.K.
  * Copyright (c) 2012 Jason Baron <jbaron@redhat.com>
  *
- * Split out from piix_pci.c
+ * Split out from piix.c
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy
  * of this software and associated documentation files (the "Software"), to deal

hw/pci-host/q35.c

@@ -7,7 +7,7 @@
  *               VA Linux Systems Japan K.K.
  * Copyright (C) 2012 Jason Baron <jbaron@redhat.com>
  *
- * This is based on piix_pci.c, but heavily modified.
+ * This is based on piix.c, but heavily modified.
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy
  * of this software and associated documentation files (the "Software"), to deal

hw/ppc/e500.c

@@ -583,7 +583,7 @@ static qemu_irq *ppce500_init_mpic(PPCE500Params *params, MemoryRegion *ccsr,
     SysBusDevice *s;
     int i;
 
-    mpic = g_new(qemu_irq, 256);
+    mpic = g_new0(qemu_irq, 256);
 
     if (kvm_enabled()) {
         QemuOpts *machine_opts = qemu_get_machine_opts();

hw/ppc/mac_newworld.c

@@ -346,7 +346,7 @@ static void ppc_core99_init(MachineState *machine)
         }
     }
 
-    pic = g_new(qemu_irq, 64);
+    pic = g_new0(qemu_irq, 64);
 
     dev = qdev_create(NULL, TYPE_OPENPIC);
     qdev_prop_set_uint32(dev, "model", OPENPIC_MODEL_RAVEN);

hw/ssi/xilinx_spi.c

@@ -329,7 +329,7 @@ static int xilinx_spi_init(SysBusDevice *sbd)
     s->spi = ssi_create_bus(dev, "spi");
 
     sysbus_init_irq(sbd, &s->irq);
-    s->cs_lines = g_new(qemu_irq, s->num_cs);
+    s->cs_lines = g_new0(qemu_irq, s->num_cs);
     ssi_auto_connect_slaves(dev, s->cs_lines, s->spi);
     for (i = 0; i < s->num_cs; ++i) {
         sysbus_init_irq(sbd, &s->cs_lines[i]);

hw/usb/dev-audio.c

@@ -371,7 +371,7 @@ static void output_callback(void *opaque, int avail)
             return;
         }
         data = streambuf_get(&s->out.buf);
-        if (NULL == data) {
+        if (!data) {
             return;
         }
         AUD_write(s->out.voice, data, USBAUDIO_PACKET_SIZE);

hw/usb/dev-mtp.c

@@ -832,7 +832,7 @@ static void usb_mtp_command(MTPState *s, MTPControl *c)
             return;
         }
         data_in = usb_mtp_get_object(s, c, o);
-        if (NULL == data_in) {
+        if (data_in == NULL) {
             usb_mtp_queue_result(s, RES_GENERAL_ERROR,
                                  c->trans, 0, 0, 0);
             return;
@@ -851,7 +851,7 @@ static void usb_mtp_command(MTPState *s, MTPControl *c)
             return;
         }
         data_in = usb_mtp_get_partial_object(s, c, o);
-        if (NULL == data_in) {
+        if (data_in == NULL) {
             usb_mtp_queue_result(s, RES_GENERAL_ERROR,
                                  c->trans, 0, 0, 0);
             return;

hw/usb/hcd-ehci.c

@@ -1596,7 +1596,7 @@ static EHCIQueue *ehci_state_fetchqh(EHCIState *ehci, int async)
 
     entry = ehci_get_fetch_addr(ehci, async);
     q = ehci_find_queue_by_qh(ehci, entry, async);
-    if (NULL == q) {
+    if (q == NULL) {
         q = ehci_alloc_queue(ehci, entry, async);
     }
 

include/hw/pci-host/pam.h

@@ -7,7 +7,7 @@
  *               VA Linux Systems Japan K.K.
  * Copyright (c) 2012 Jason Baron <jbaron@redhat.com>
  *
- * Split out from piix_pci.c
+ * Split out from piix.c
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy
  * of this software and associated documentation files (the "Software"), to deal

memory.c

@@ -56,8 +56,7 @@ static void memory_init(void)
 typedef struct AddrRange AddrRange;
 
 /*
- * Note using signed integers limits us to physical addresses at most
+ * Note that signed integers are needed for negative offsetting in aliases
- * 63 bits wide.  They are needed for negative offsetting in aliases
  * (large MemoryRegion::alias_offset).
  */
 struct AddrRange {

qdev-monitor.c

@@ -688,7 +688,7 @@ void qmp_device_del(const char *id, Error **errp)
     DeviceState *dev;
 
     dev = qdev_find_recursive(sysbus_get_default(), id);
-    if (NULL == dev) {
+    if (!dev) {
         error_set(errp, QERR_DEVICE_NOT_FOUND, id);
         return;
     }

qemu-char.c

@@ -4121,7 +4121,7 @@ void qmp_chardev_remove(const char *id, Error **errp)
     CharDriverState *chr;
 
     chr = qemu_chr_find(id);
-    if (NULL == chr) {
+    if (chr == NULL) {
         error_setg(errp, "Chardev '%s' not found", id);
         return;
     }

qemu-options.hx

@@ -1444,7 +1444,7 @@ DEF("net", HAS_ARG, QEMU_OPTION_net,
     "                use 'src=' to specify source address\n"
     "                use 'dst=' to specify destination address\n"
     "                use 'udp=on' to specify udp encapsulation\n"
-    "                use 'dstport=' to specify destination udp port\n"
+    "                use 'srcport=' to specify source udp port\n"
     "                use 'dstport=' to specify destination udp port\n"
     "                use 'ipv6=on' to force v6\n"
     "                L2TPv3 uses cookies to prevent misconfiguration as\n"
@@ -1926,7 +1926,7 @@ ETEXI
 
 DEF("chardev", HAS_ARG, QEMU_OPTION_chardev,
     "-chardev null,id=id[,mux=on|off]\n"
-    "-chardev socket,id=id[,host=host],port=host[,to=to][,ipv4][,ipv6][,nodelay]\n"
+    "-chardev socket,id=id[,host=host],port=port[,to=to][,ipv4][,ipv6][,nodelay]\n"
     "         [,server][,nowait][,telnet][,mux=on|off] (tcp)\n"
     "-chardev socket,id=id,path=path[,server][,nowait][,telnet],[mux=on|off] (unix)\n"
     "-chardev udp,id=id[,host=host],port=port[,localaddr=localaddr]\n"

ui/spice-core.c

@@ -677,7 +677,7 @@ void qemu_spice_init(void)
 
     if (tls_port) {
         x509_dir = qemu_opt_get(opts, "x509-dir");
-        if (NULL == x509_dir) {
+        if (!x509_dir) {
             x509_dir = ".";
         }
 
@@ -803,7 +803,7 @@ void qemu_spice_init(void)
 
     seamless_migration = qemu_opt_get_bool(opts, "seamless-migration", 0);
     spice_server_set_seamless_migration(spice_server, seamless_migration);
-    if (0 != spice_server_init(spice_server, &core_interface)) {
+    if (spice_server_init(spice_server, &core_interface) != 0) {
         error_report("failed to initialize spice server");
         exit(1);
     };

util/qemu-sockets.c

@@ -732,7 +732,7 @@ int unix_connect_opts(QemuOpts *opts, Error **errp,
     ConnectState *connect_state = NULL;
     int sock, rc;
 
-    if (NULL == path) {
+    if (path == NULL) {
         error_setg(errp, "unix connect: no path specified");
         return -1;
     }

vl.c

@@ -1154,7 +1154,7 @@ static int drive_init_func(QemuOpts *opts, void *opaque)
 
 static int drive_enable_snapshot(QemuOpts *opts, void *opaque)
 {
-    if (NULL == qemu_opt_get(opts, "snapshot")) {
+    if (qemu_opt_get(opts, "snapshot") == NULL) {
         qemu_opt_set(opts, "snapshot", "on");
     }
     return 0;
@@ -2506,9 +2506,10 @@ static int foreach_device_config(int type, int (*func)(const char *cmdline))
         loc_push_restore(&conf->loc);
         rc = func(conf->cmdline);
         loc_pop(&conf->loc);
-        if (0 != rc)
+        if (rc) {
             return rc;
         }
+    }
     return 0;
 }
 
@@ -2917,6 +2918,7 @@ out:
     g_free(dummy);
     if (err) {
         qerror_report_err(err);
+        error_free(err);
         return -1;
     }
     return 0;