Check status of AcpiReadBitRegister() calls.
Reported by: Coverity CID: 1306132
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@ -1074,6 +1074,7 @@ acpi_cpu_idle(sbintime_t sbt)
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struct acpi_cx *cx_next;
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uint64_t cputicks;
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uint32_t start_time, end_time;
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ACPI_STATUS status;
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int bm_active, cx_next_idx, i, us;
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/*
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@ -1119,8 +1120,8 @@ acpi_cpu_idle(sbintime_t sbt)
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*/
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if ((cpu_quirks & CPU_QUIRK_NO_BM_CTRL) == 0 &&
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cx_next_idx > sc->cpu_non_c3) {
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AcpiReadBitRegister(ACPI_BITREG_BUS_MASTER_STATUS, &bm_active);
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if (bm_active != 0) {
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status = AcpiReadBitRegister(ACPI_BITREG_BUS_MASTER_STATUS, &bm_active);
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if (ACPI_SUCCESS(status) && bm_active != 0) {
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AcpiWriteBitRegister(ACPI_BITREG_BUS_MASTER_STATUS, 1);
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cx_next_idx = sc->cpu_non_c3;
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}
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@ -1285,6 +1286,7 @@ acpi_cpu_quirks_piix4(void)
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#ifdef __i386__
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device_t acpi_dev;
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uint32_t val;
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ACPI_STATUS status;
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acpi_dev = pci_find_device(PCI_VENDOR_INTEL, PCI_DEVICE_82371AB_3);
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if (acpi_dev != NULL) {
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@ -1323,8 +1325,8 @@ acpi_cpu_quirks_piix4(void)
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val |= PIIX4_STOP_BREAK_MASK;
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pci_write_config(acpi_dev, PIIX4_DEVACTB_REG, val, 4);
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}
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AcpiReadBitRegister(ACPI_BITREG_BUS_MASTER_RLD, &val);
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if (val) {
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status = AcpiReadBitRegister(ACPI_BITREG_BUS_MASTER_RLD, &val);
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if (ACPI_SUCCESS(status) && val != 0) {
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ACPI_DEBUG_PRINT((ACPI_DB_INFO,
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"acpi_cpu: PIIX4: reset BRLD_EN_BM\n"));
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AcpiWriteBitRegister(ACPI_BITREG_BUS_MASTER_RLD, 0);
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