Re: [PATCH v11 3/8] SD (Secure Card): introduce ERRP_AUTO_PROPAGATE

[Philippe Mathieu-Daudé]

On 7/3/20 11:08 AM, Vladimir Sementsov-Ogievskiy wrote:
> If we want to add some info to errp (by error_prepend() or
> error_append_hint()), we must use the ERRP_AUTO_PROPAGATE macro.
> Otherwise, this info will not be added when errp == &error_fatal
> (the program will exit prior to the error_append_hint() or
> error_prepend() call).  Fix such cases.
> 
> If we want to check error after errp-function call, we need to
> introduce local_err and then propagate it to errp. Instead, use
> ERRP_AUTO_PROPAGATE macro, benefits are:
> 1. No need of explicit error_propagate call
> 2. No need of explicit local_err variable: use errp directly
> 3. ERRP_AUTO_PROPAGATE leaves errp as is if it's not NULL or
>    &error_fatal, this means that we don't break error_abort
>    (we'll abort on error_set, not on error_propagate)
> 
> This commit is generated by command
> 
>     sed -n '/^SD (Secure Card)$/,/^$/{s/^F: //p}' \
>         MAINTAINERS | \
>     xargs git ls-files | grep '\.[hc]$' | \
>     xargs spatch \
>         --sp-file scripts/coccinelle/auto-propagated-errp.cocci \
>         --macro-file scripts/cocci-macro-file.h \
>         --in-place --no-show-diff --max-width 80
> 
> Reported-by: Kevin Wolf <kwolf@redhat.com>
> Reported-by: Greg Kurz <groug@kaod.org>
> Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>

If possible 's/SD (Secure Card)/sd/' in subject.
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>

> ---
>  hw/sd/sdhci-pci.c |  7 +++----
>  hw/sd/sdhci.c     | 21 +++++++++------------
>  hw/sd/ssi-sd.c    | 10 +++++-----
>  3 files changed, 17 insertions(+), 21 deletions(-)
> 
> diff --git a/hw/sd/sdhci-pci.c b/hw/sd/sdhci-pci.c
> index 4f5977d487..38ec572fc6 100644
> --- a/hw/sd/sdhci-pci.c
> +++ b/hw/sd/sdhci-pci.c
> @@ -29,13 +29,12 @@ static Property sdhci_pci_properties[] = {
>  
>  static void sdhci_pci_realize(PCIDevice *dev, Error **errp)
>  {
> +    ERRP_AUTO_PROPAGATE();
>      SDHCIState *s = PCI_SDHCI(dev);
> -    Error *local_err = NULL;
>  
>      sdhci_initfn(s);
> -    sdhci_common_realize(s, &local_err);
> -    if (local_err) {
> -        error_propagate(errp, local_err);
> +    sdhci_common_realize(s, errp);
> +    if (*errp) {
>          return;
>      }
>  
> diff --git a/hw/sd/sdhci.c b/hw/sd/sdhci.c
> index eb2be6529e..be1928784d 100644
> --- a/hw/sd/sdhci.c
> +++ b/hw/sd/sdhci.c
> @@ -1288,7 +1288,7 @@ static const MemoryRegionOps sdhci_mmio_ops = {
>  
>  static void sdhci_init_readonly_registers(SDHCIState *s, Error **errp)
>  {
> -    Error *local_err = NULL;
> +    ERRP_AUTO_PROPAGATE();
>  
>      switch (s->sd_spec_version) {
>      case 2 ... 3:
> @@ -1299,9 +1299,8 @@ static void sdhci_init_readonly_registers(SDHCIState 
> *s, Error **errp)
>      }
>      s->version = (SDHC_HCVER_VENDOR << 8) | (s->sd_spec_version - 1);
>  
> -    sdhci_check_capareg(s, &local_err);
> -    if (local_err) {
> -        error_propagate(errp, local_err);
> +    sdhci_check_capareg(s, errp);
> +    if (*errp) {
>          return;
>      }
>  }
> @@ -1332,11 +1331,10 @@ void sdhci_uninitfn(SDHCIState *s)
>  
>  void sdhci_common_realize(SDHCIState *s, Error **errp)
>  {
> -    Error *local_err = NULL;
> +    ERRP_AUTO_PROPAGATE();
>  
> -    sdhci_init_readonly_registers(s, &local_err);
> -    if (local_err) {
> -        error_propagate(errp, local_err);
> +    sdhci_init_readonly_registers(s, errp);
> +    if (*errp) {
>          return;
>      }
>      s->buf_maxsz = sdhci_get_fifolen(s);
> @@ -1456,13 +1454,12 @@ static void sdhci_sysbus_finalize(Object *obj)
>  
>  static void sdhci_sysbus_realize(DeviceState *dev, Error **errp)
>  {
> +    ERRP_AUTO_PROPAGATE();
>      SDHCIState *s = SYSBUS_SDHCI(dev);
>      SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
> -    Error *local_err = NULL;
>  
> -    sdhci_common_realize(s, &local_err);
> -    if (local_err) {
> -        error_propagate(errp, local_err);
> +    sdhci_common_realize(s, errp);
> +    if (*errp) {
>          return;
>      }
>  
> diff --git a/hw/sd/ssi-sd.c b/hw/sd/ssi-sd.c
> index e0fb9f3093..43e5730b00 100644
> --- a/hw/sd/ssi-sd.c
> +++ b/hw/sd/ssi-sd.c
> @@ -241,10 +241,10 @@ static const VMStateDescription vmstate_ssi_sd = {
>  
>  static void ssi_sd_realize(SSISlave *d, Error **errp)
>  {
> +    ERRP_AUTO_PROPAGATE();
>      ssi_sd_state *s = FROM_SSI_SLAVE(ssi_sd_state, d);
>      DeviceState *carddev;
>      DriveInfo *dinfo;
> -    Error *err = NULL;
>  
>      qbus_create_inplace(&s->sdbus, sizeof(s->sdbus), TYPE_SD_BUS,
>                          DEVICE(d), "sd-bus");
> @@ -255,23 +255,23 @@ static void ssi_sd_realize(SSISlave *d, Error **errp)
>      carddev = qdev_new(TYPE_SD_CARD);
>      if (dinfo) {
>          if (!qdev_prop_set_drive_err(carddev, "drive",
> -                                     blk_by_legacy_dinfo(dinfo), &err)) {
> +                                     blk_by_legacy_dinfo(dinfo), errp)) {
>              goto fail;
>          }
>      }
>  
> -    if (!object_property_set_bool(OBJECT(carddev), "spi", true, &err)) {
> +    if (!object_property_set_bool(OBJECT(carddev), "spi", true, errp)) {
>          goto fail;
>      }
>  
> -    if (!qdev_realize_and_unref(carddev, BUS(&s->sdbus), &err)) {
> +    if (!qdev_realize_and_unref(carddev, BUS(&s->sdbus), errp)) {
>          goto fail;
>      }
>  
>      return;
>  
>  fail:
> -    error_propagate_prepend(errp, err, "failed to init SD card: ");
> +    error_prepend(errp, "failed to init SD card: ");
>  }
>  
>  static void ssi_sd_reset(DeviceState *dev)
>