sd: Use ERRP_GUARD()

If we want to check error after errp-function call, we need to
introduce local_err and then propagate it to errp. Instead, use
the ERRP_GUARD() macro, benefits are:
1. No need of explicit error_propagate call
2. No need of explicit local_err variable: use errp directly
3. ERRP_GUARD() 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)

If we want to add some info to errp (by error_prepend() or
error_append_hint()), we must use the ERRP_GUARD() 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).  No such cases are being fixed here.

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/errp-guard.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>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
[Commit message tweaked]
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20200707165037.1026246-4-armbru@redhat.com>
[ERRP_AUTO_PROPAGATE() renamed to ERRP_GUARD(), and
auto-propagated-errp.cocci to errp-guard.cocci.  Commit message
tweaked again.]

1 files changed, 5 insertions, 5 deletions

diff --git a/hw/sd/ssi-sd.c b/hw/sd/ssi-sd.c
index 3717b2e..9210ef5 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_GUARD();
     ssi_sd_state *s = SSI_SD(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)