qemu/target/openrisc
Peter Maydell 7b0263cb14 target/openrisc: Remove dead code attempting to check "is timer disabled"
In the mtspr helper we attempt to check for "is the timer disabled"
with "if (env->ttmr & TIMER_NONE)".  This is wrong because TIMER_NONE
is zero and the condition is always false (Coverity complains about
the dead code.)

The correct check would be to test whether the TTMR_M field in the
register is equal to TIMER_NONE instead.  However, the
cpu_openrisc_timer_update() function checks whether the timer is
enabled (it looks at cpu->env.is_counting, which is set to 0 via
cpu_openrisc_count_stop() when the TTMR_M field is set to
TIMER_NONE), so there's no need to check for "timer disabled" in the
target/openrisc code.  Instead, simply remove the dead code.

Fixes: Coverity CID 1005812
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Acked-by: Stafford Horne <shorne@gmail.com>
Message-id: 20201103114654.18540-1-peter.maydell@linaro.org
2020-11-17 12:56:32 +00:00
..
cpu-param.h tcg: Split out target/arch/cpu-param.h 2019-06-10 07:03:34 -07:00
cpu.c cpu: Use DeviceClass reset instead of a special CPUClass reset 2020-03-17 19:48:10 -04:00
cpu.h qom: Remove module_obj_name parameter from OBJECT_DECLARE* macros 2020-09-18 14:12:32 -04:00
disas.c meson: target 2020-08-21 06:30:35 -04:00
exception_helper.c target/openrisc: Use env_cpu, env_archcpu 2019-06-10 07:03:42 -07:00
exception.c target/openrisc: Fix LGPL information in the file headers 2019-05-08 17:45:54 +02:00
exception.h Include qemu-common.h exactly where needed 2019-06-12 13:20:20 +02:00
fpu_helper.c softfloat: Name compare relation enum 2020-05-19 08:41:45 -07:00
gdbstub.c gdbstub: extend GByteArray to read register helpers 2020-03-17 17:38:38 +00:00
helper.h target/openrisc: Implement unordered fp comparisons 2019-09-04 12:57:59 -07:00
insns.decode target/openrisc: Implement l.adrp 2019-09-04 12:59:00 -07:00
interrupt_helper.c target/openrisc: Fix LGPL version number 2019-01-30 11:01:36 +01:00
interrupt.c Include qemu-common.h exactly where needed 2019-06-12 13:20:20 +02:00
machine.c target/openrisc: Implement move to/from FPCSR 2019-09-04 12:58:55 -07:00
meson.build meson: target 2020-08-21 06:30:35 -04:00
mmu.c Include qemu-common.h exactly where needed 2019-06-12 13:20:20 +02:00
sys_helper.c target/openrisc: Remove dead code attempting to check "is timer disabled" 2020-11-17 12:56:32 +00:00
translate.c meson: target 2020-08-21 06:30:35 -04:00