From: Chen Qun <kuhn.chen...@huawei.com> The current code causes clang static code analyzer generate warning: hw/net/imx_fec.c:858:9: warning: Value stored to 'value' is never read value = value & 0x0000000f; ^ ~~~~~~~~~~~~~~~~~~ hw/net/imx_fec.c:864:9: warning: Value stored to 'value' is never read value = value & 0x000000fd; ^ ~~~~~~~~~~~~~~~~~~
According to the definition of the function, the two “value” assignments should be written to registers. Reported-by: Euler Robot <euler.ro...@huawei.com> Signed-off-by: Chen Qun <kuhn.chen...@huawei.com> Message-id: 20200313123242.13236-1-kuhn.chen...@huawei.com Reviewed-by: Peter Maydell <peter.mayd...@linaro.org> Signed-off-by: Peter Maydell <peter.mayd...@linaro.org> --- hw/net/imx_fec.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/hw/net/imx_fec.c b/hw/net/imx_fec.c index 6a124a154a8..5c145a8197e 100644 --- a/hw/net/imx_fec.c +++ b/hw/net/imx_fec.c @@ -855,13 +855,15 @@ static void imx_enet_write(IMXFECState *s, uint32_t index, uint32_t value) break; case ENET_TGSR: /* implement clear timer flag */ - value = value & 0x0000000f; + s->regs[index] &= ~(value & 0x0000000f); /* all bits W1C */ break; case ENET_TCSR0: case ENET_TCSR1: case ENET_TCSR2: case ENET_TCSR3: - value = value & 0x000000fd; + s->regs[index] &= ~(value & 0x00000080); /* W1C bits */ + s->regs[index] &= ~0x0000007d; /* writable fields */ + s->regs[index] |= (value & 0x0000007d); break; case ENET_TCCR0: case ENET_TCCR1: -- 2.20.1