From 668f62ec621e4e2919fb7d4caa5d805764c5852d Mon Sep 17 00:00:00 2001 From: Markus Armbruster Date: Tue, 7 Jul 2020 18:06:02 +0200 Subject: error: Eliminate error_propagate() with Coccinelle, part 1 When all we do with an Error we receive into a local variable is propagating to somewhere else, we can just as well receive it there right away. Convert if (!foo(..., &err)) { ... error_propagate(errp, err); ... return ... } to if (!foo(..., errp)) { ... ... return ... } where nothing else needs @err. Coccinelle script: @rule1 forall@ identifier fun, err, errp, lbl; expression list args, args2; binary operator op; constant c1, c2; symbol false; @@ if ( ( - fun(args, &err, args2) + fun(args, errp, args2) | - !fun(args, &err, args2) + !fun(args, errp, args2) | - fun(args, &err, args2) op c1 + fun(args, errp, args2) op c1 ) ) { ... when != err when != lbl: when strict - error_propagate(errp, err); ... when != err ( return; | return c2; | return false; ) } @rule2 forall@ identifier fun, err, errp, lbl; expression list args, args2; expression var; binary operator op; constant c1, c2; symbol false; @@ - var = fun(args, &err, args2); + var = fun(args, errp, args2); ... when != err if ( ( var | !var | var op c1 ) ) { ... when != err when != lbl: when strict - error_propagate(errp, err); ... when != err ( return; | return c2; | return false; | return var; ) } @depends on rule1 || rule2@ identifier err; @@ - Error *err = NULL; ... when != err Not exactly elegant, I'm afraid. The "when != lbl:" is necessary to avoid transforming if (fun(args, &err)) { goto out } ... out: error_propagate(errp, err); even though other paths to label out still need the error_propagate(). For an actual example, see sclp_realize(). Without the "when strict", Coccinelle transforms vfio_msix_setup(), incorrectly. I don't know what exactly "when strict" does, only that it helps here. The match of return is narrower than what I want, but I can't figure out how to express "return where the operand doesn't use @err". For an example where it's too narrow, see vfio_intx_enable(). Silently fails to convert hw/arm/armsse.c, because Coccinelle gets confused by ARMSSE being used both as typedef and function-like macro there. Converted manually. Line breaks tidied up manually. One nested declaration of @local_err deleted manually. Preexisting unwanted blank line dropped in hw/riscv/sifive_e.c. Signed-off-by: Markus Armbruster Reviewed-by: Eric Blake Message-Id: <20200707160613.848843-35-armbru@redhat.com> --- hw/arm/armsse.c | 114 +++++++++++++++++++------------------------------------- 1 file changed, 38 insertions(+), 76 deletions(-) (limited to 'hw/arm/armsse.c') diff --git a/hw/arm/armsse.c b/hw/arm/armsse.c index c8604926a3..64fcab895f 100644 --- a/hw/arm/armsse.c +++ b/hw/arm/armsse.c @@ -535,20 +535,17 @@ static void armsse_realize(DeviceState *dev, Error **errp) */ if (extract32(info->cpuwait_rst, i, 1)) { if (!object_property_set_bool(cpuobj, "start-powered-off", true, - &err)) { - error_propagate(errp, err); + errp)) { return; } } if (!s->cpu_fpu[i]) { - if (!object_property_set_bool(cpuobj, "vfp", false, &err)) { - error_propagate(errp, err); + if (!object_property_set_bool(cpuobj, "vfp", false, errp)) { return; } } if (!s->cpu_dsp[i]) { - if (!object_property_set_bool(cpuobj, "dsp", false, &err)) { - error_propagate(errp, err); + if (!object_property_set_bool(cpuobj, "dsp", false, errp)) { return; } } @@ -563,8 +560,7 @@ static void armsse_realize(DeviceState *dev, Error **errp) object_property_set_link(cpuobj, "memory", OBJECT(&s->cpu_container[i]), &error_abort); object_property_set_link(cpuobj, "idau", OBJECT(s), &error_abort); - if (!sysbus_realize(SYS_BUS_DEVICE(cpuobj), &err)) { - error_propagate(errp, err); + if (!sysbus_realize(SYS_BUS_DEVICE(cpuobj), errp)) { return; } /* @@ -573,8 +569,7 @@ static void armsse_realize(DeviceState *dev, Error **errp) * CPU must exist and have been parented into the cluster before * the cluster is realized. */ - if (!qdev_realize(DEVICE(&s->cluster[i]), NULL, &err)) { - error_propagate(errp, err); + if (!qdev_realize(DEVICE(&s->cluster[i]), NULL, errp)) { return; } @@ -603,12 +598,10 @@ static void armsse_realize(DeviceState *dev, Error **errp) int cpunum; if (!object_property_set_int(splitter, "num-lines", - info->num_cpus, &err)) { - error_propagate(errp, err); + info->num_cpus, errp)) { return; } - if (!qdev_realize(DEVICE(splitter), NULL, &err)) { - error_propagate(errp, err); + if (!qdev_realize(DEVICE(splitter), NULL, errp)) { return; } for (cpunum = 0; cpunum < info->num_cpus; cpunum++) { @@ -639,8 +632,7 @@ static void armsse_realize(DeviceState *dev, Error **errp) } /* Security controller */ - if (!sysbus_realize(SYS_BUS_DEVICE(&s->secctl), &err)) { - error_propagate(errp, err); + if (!sysbus_realize(SYS_BUS_DEVICE(&s->secctl), errp)) { return; } sbd_secctl = SYS_BUS_DEVICE(&s->secctl); @@ -656,12 +648,10 @@ static void armsse_realize(DeviceState *dev, Error **errp) * that will be an output from the ARMSSE to the system. */ if (!object_property_set_int(OBJECT(&s->sec_resp_splitter), - "num-lines", 3, &err)) { - error_propagate(errp, err); + "num-lines", 3, errp)) { return; } - if (!qdev_realize(DEVICE(&s->sec_resp_splitter), NULL, &err)) { - error_propagate(errp, err); + if (!qdev_realize(DEVICE(&s->sec_resp_splitter), NULL, errp)) { return; } dev_splitter = DEVICE(&s->sec_resp_splitter); @@ -683,8 +673,7 @@ static void armsse_realize(DeviceState *dev, Error **errp) } object_property_set_link(OBJECT(&s->mpc[i]), "downstream", OBJECT(&s->sram[i]), &error_abort); - if (!sysbus_realize(SYS_BUS_DEVICE(&s->mpc[i]), &err)) { - error_propagate(errp, err); + if (!sysbus_realize(SYS_BUS_DEVICE(&s->mpc[i]), errp)) { return; } /* Map the upstream end of the MPC into the right place... */ @@ -700,12 +689,10 @@ static void armsse_realize(DeviceState *dev, Error **errp) /* We must OR together lines from the MPC splitters to go to the NVIC */ if (!object_property_set_int(OBJECT(&s->mpc_irq_orgate), "num-lines", IOTS_NUM_EXP_MPC + info->sram_banks, - &err)) { - error_propagate(errp, err); + errp)) { return; } - if (!qdev_realize(DEVICE(&s->mpc_irq_orgate), NULL, &err)) { - error_propagate(errp, err); + if (!qdev_realize(DEVICE(&s->mpc_irq_orgate), NULL, errp)) { return; } qdev_connect_gpio_out(DEVICE(&s->mpc_irq_orgate), 0, @@ -722,8 +709,7 @@ static void armsse_realize(DeviceState *dev, Error **errp) * map its upstream ends to the right place in the container. */ qdev_prop_set_uint32(DEVICE(&s->timer0), "pclk-frq", s->mainclk_frq); - if (!sysbus_realize(SYS_BUS_DEVICE(&s->timer0), &err)) { - error_propagate(errp, err); + if (!sysbus_realize(SYS_BUS_DEVICE(&s->timer0), errp)) { return; } sysbus_connect_irq(SYS_BUS_DEVICE(&s->timer0), 0, @@ -733,8 +719,7 @@ static void armsse_realize(DeviceState *dev, Error **errp) &error_abort); qdev_prop_set_uint32(DEVICE(&s->timer1), "pclk-frq", s->mainclk_frq); - if (!sysbus_realize(SYS_BUS_DEVICE(&s->timer1), &err)) { - error_propagate(errp, err); + if (!sysbus_realize(SYS_BUS_DEVICE(&s->timer1), errp)) { return; } sysbus_connect_irq(SYS_BUS_DEVICE(&s->timer1), 0, @@ -744,8 +729,7 @@ static void armsse_realize(DeviceState *dev, Error **errp) &error_abort); qdev_prop_set_uint32(DEVICE(&s->dualtimer), "pclk-frq", s->mainclk_frq); - if (!sysbus_realize(SYS_BUS_DEVICE(&s->dualtimer), &err)) { - error_propagate(errp, err); + if (!sysbus_realize(SYS_BUS_DEVICE(&s->dualtimer), errp)) { return; } sysbus_connect_irq(SYS_BUS_DEVICE(&s->dualtimer), 0, @@ -769,8 +753,7 @@ static void armsse_realize(DeviceState *dev, Error **errp) int cpunum; SysBusDevice *mhu_sbd = SYS_BUS_DEVICE(&s->mhu[i]); - if (!sysbus_realize(SYS_BUS_DEVICE(&s->mhu[i]), &err)) { - error_propagate(errp, err); + if (!sysbus_realize(SYS_BUS_DEVICE(&s->mhu[i]), errp)) { return; } port = g_strdup_printf("port[%d]", i + 3); @@ -795,8 +778,7 @@ static void armsse_realize(DeviceState *dev, Error **errp) } } - if (!sysbus_realize(SYS_BUS_DEVICE(&s->apb_ppc0), &err)) { - error_propagate(errp, err); + if (!sysbus_realize(SYS_BUS_DEVICE(&s->apb_ppc0), errp)) { return; } @@ -838,12 +820,10 @@ static void armsse_realize(DeviceState *dev, Error **errp) * ORed together to give a single combined PPC interrupt to the NVIC. */ if (!object_property_set_int(OBJECT(&s->ppc_irq_orgate), - "num-lines", NUM_PPCS, &err)) { - error_propagate(errp, err); + "num-lines", NUM_PPCS, errp)) { return; } - if (!qdev_realize(DEVICE(&s->ppc_irq_orgate), NULL, &err)) { - error_propagate(errp, err); + if (!qdev_realize(DEVICE(&s->ppc_irq_orgate), NULL, errp)) { return; } qdev_connect_gpio_out(DEVICE(&s->ppc_irq_orgate), 0, @@ -864,8 +844,7 @@ static void armsse_realize(DeviceState *dev, Error **errp) qdev_prop_set_string(DEVICE(&s->cachectrl[i]), "name", name); g_free(name); qdev_prop_set_uint64(DEVICE(&s->cachectrl[i]), "size", 0x1000); - if (!sysbus_realize(SYS_BUS_DEVICE(&s->cachectrl[i]), &err)) { - error_propagate(errp, err); + if (!sysbus_realize(SYS_BUS_DEVICE(&s->cachectrl[i]), errp)) { return; } @@ -881,8 +860,7 @@ static void armsse_realize(DeviceState *dev, Error **errp) qdev_prop_set_string(DEVICE(&s->cpusecctrl[i]), "name", name); g_free(name); qdev_prop_set_uint64(DEVICE(&s->cpusecctrl[i]), "size", 0x1000); - if (!sysbus_realize(SYS_BUS_DEVICE(&s->cpusecctrl[i]), &err)) { - error_propagate(errp, err); + if (!sysbus_realize(SYS_BUS_DEVICE(&s->cpusecctrl[i]), errp)) { return; } @@ -895,8 +873,7 @@ static void armsse_realize(DeviceState *dev, Error **errp) MemoryRegion *mr; qdev_prop_set_uint32(DEVICE(&s->cpuid[i]), "CPUID", i); - if (!sysbus_realize(SYS_BUS_DEVICE(&s->cpuid[i]), &err)) { - error_propagate(errp, err); + if (!sysbus_realize(SYS_BUS_DEVICE(&s->cpuid[i]), errp)) { return; } @@ -910,8 +887,7 @@ static void armsse_realize(DeviceState *dev, Error **errp) * 0x4002f000: S32K timer */ qdev_prop_set_uint32(DEVICE(&s->s32ktimer), "pclk-frq", S32KCLK); - if (!sysbus_realize(SYS_BUS_DEVICE(&s->s32ktimer), &err)) { - error_propagate(errp, err); + if (!sysbus_realize(SYS_BUS_DEVICE(&s->s32ktimer), errp)) { return; } sysbus_connect_irq(SYS_BUS_DEVICE(&s->s32ktimer), 0, @@ -920,8 +896,7 @@ static void armsse_realize(DeviceState *dev, Error **errp) object_property_set_link(OBJECT(&s->apb_ppc1), "port[0]", OBJECT(mr), &error_abort); - if (!sysbus_realize(SYS_BUS_DEVICE(&s->apb_ppc1), &err)) { - error_propagate(errp, err); + if (!sysbus_realize(SYS_BUS_DEVICE(&s->apb_ppc1), errp)) { return; } mr = sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->apb_ppc1), 0); @@ -945,17 +920,14 @@ static void armsse_realize(DeviceState *dev, Error **errp) "cfg_sec_resp", 0)); if (!object_property_set_int(OBJECT(&s->sysinfo), "SYS_VERSION", - info->sys_version, &err)) { - error_propagate(errp, err); + info->sys_version, errp)) { return; } if (!object_property_set_int(OBJECT(&s->sysinfo), "SYS_CONFIG", - armsse_sys_config_value(s, info), &err)) { - error_propagate(errp, err); + armsse_sys_config_value(s, info), errp)) { return; } - if (!sysbus_realize(SYS_BUS_DEVICE(&s->sysinfo), &err)) { - error_propagate(errp, err); + if (!sysbus_realize(SYS_BUS_DEVICE(&s->sysinfo), errp)) { return; } /* System information registers */ @@ -969,8 +941,7 @@ static void armsse_realize(DeviceState *dev, Error **errp) s->init_svtor, &error_abort); object_property_set_int(OBJECT(&s->sysctl), "INITSVTOR1_RST", s->init_svtor, &error_abort); - if (!sysbus_realize(SYS_BUS_DEVICE(&s->sysctl), &err)) { - error_propagate(errp, err); + if (!sysbus_realize(SYS_BUS_DEVICE(&s->sysctl), errp)) { return; } sysbus_mmio_map(SYS_BUS_DEVICE(&s->sysctl), 0, 0x50021000); @@ -999,20 +970,17 @@ static void armsse_realize(DeviceState *dev, Error **errp) /* This OR gate wires together outputs from the secure watchdogs to NMI */ if (!object_property_set_int(OBJECT(&s->nmi_orgate), "num-lines", 2, - &err)) { - error_propagate(errp, err); + errp)) { return; } - if (!qdev_realize(DEVICE(&s->nmi_orgate), NULL, &err)) { - error_propagate(errp, err); + if (!qdev_realize(DEVICE(&s->nmi_orgate), NULL, errp)) { return; } qdev_connect_gpio_out(DEVICE(&s->nmi_orgate), 0, qdev_get_gpio_in_named(DEVICE(&s->armv7m), "NMI", 0)); qdev_prop_set_uint32(DEVICE(&s->s32kwatchdog), "wdogclk-frq", S32KCLK); - if (!sysbus_realize(SYS_BUS_DEVICE(&s->s32kwatchdog), &err)) { - error_propagate(errp, err); + if (!sysbus_realize(SYS_BUS_DEVICE(&s->s32kwatchdog), errp)) { return; } sysbus_connect_irq(SYS_BUS_DEVICE(&s->s32kwatchdog), 0, @@ -1022,8 +990,7 @@ static void armsse_realize(DeviceState *dev, Error **errp) /* 0x40080000 .. 0x4008ffff : ARMSSE second Base peripheral region */ qdev_prop_set_uint32(DEVICE(&s->nswatchdog), "wdogclk-frq", s->mainclk_frq); - if (!sysbus_realize(SYS_BUS_DEVICE(&s->nswatchdog), &err)) { - error_propagate(errp, err); + if (!sysbus_realize(SYS_BUS_DEVICE(&s->nswatchdog), errp)) { return; } sysbus_connect_irq(SYS_BUS_DEVICE(&s->nswatchdog), 0, @@ -1031,8 +998,7 @@ static void armsse_realize(DeviceState *dev, Error **errp) sysbus_mmio_map(SYS_BUS_DEVICE(&s->nswatchdog), 0, 0x40081000); qdev_prop_set_uint32(DEVICE(&s->swatchdog), "wdogclk-frq", s->mainclk_frq); - if (!sysbus_realize(SYS_BUS_DEVICE(&s->swatchdog), &err)) { - error_propagate(errp, err); + if (!sysbus_realize(SYS_BUS_DEVICE(&s->swatchdog), errp)) { return; } sysbus_connect_irq(SYS_BUS_DEVICE(&s->swatchdog), 0, @@ -1042,12 +1008,10 @@ static void armsse_realize(DeviceState *dev, Error **errp) for (i = 0; i < ARRAY_SIZE(s->ppc_irq_splitter); i++) { Object *splitter = OBJECT(&s->ppc_irq_splitter[i]); - if (!object_property_set_int(splitter, "num-lines", 2, &err)) { - error_propagate(errp, err); + if (!object_property_set_int(splitter, "num-lines", 2, errp)) { return; } - if (!qdev_realize(DEVICE(splitter), NULL, &err)) { - error_propagate(errp, err); + if (!qdev_realize(DEVICE(splitter), NULL, errp)) { return; } } @@ -1088,12 +1052,10 @@ static void armsse_realize(DeviceState *dev, Error **errp) DeviceState *dev_splitter = DEVICE(splitter); if (!object_property_set_int(OBJECT(splitter), "num-lines", 2, - &err)) { - error_propagate(errp, err); + errp)) { return; } - if (!qdev_realize(DEVICE(splitter), NULL, &err)) { - error_propagate(errp, err); + if (!qdev_realize(DEVICE(splitter), NULL, errp)) { return; } -- cgit v1.2.3