1:40 a.m.
tree: https://github.com/dlech/linux bone-counter
head: f8f0ad10f30b5c1bea1a22f5de5dc9f2c6b7db1a
commit: 5251e7147d627fbe13308dc390347dc16efeb85b [1/12] counter: Internalize sysfs
interface code
config: x86_64-randconfig-m001-20201014 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-15) 9.3.0
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp(a)intel.com>
Reported-by: Dan Carpenter <dan.carpenter(a)oracle.com>
New smatch warnings:
drivers/counter/microchip-tcb-capture.c:173 mchp_tc_count_action_read() warn: bitwise AND
condition is false here
drivers/counter/counter-sysfs.c:109 counter_comp_u8_show() error: uninitialized symbol
'err'.
drivers/counter/counter-sysfs.c:114 counter_comp_u8_show() error: uninitialized symbol
'data'.
drivers/counter/counter-sysfs.c:233 counter_comp_u64_show() error: uninitialized symbol
'err'.
drivers/counter/counter-sysfs.c:236 counter_comp_u64_show() error: uninitialized symbol
'data'.
Old smatch warnings:
drivers/counter/counter-sysfs.c:116 counter_comp_u8_show() error: uninitialized symbol
'data'.
drivers/counter/counter-sysfs.c:118 counter_comp_u8_show() error: uninitialized symbol
'data'.
drivers/counter/counter-sysfs.c:120 counter_comp_u8_show() error: uninitialized symbol
'data'.
drivers/counter/counter-sysfs.c:122 counter_comp_u8_show() error: uninitialized symbol
'data'.
drivers/counter/counter-sysfs.c:124 counter_comp_u8_show() error: uninitialized symbol
'data'.
drivers/counter/counter-sysfs.c:126 counter_comp_u8_show() error: uninitialized symbol
'data'.
drivers/counter/counter-sysfs.c:131 counter_comp_u8_show() error: uninitialized symbol
'data'.
vim +173 drivers/counter/microchip-tcb-capture.c
5251e7147d627fb William Breathitt Gray 2020-09-26 161 static int
mchp_tc_count_action_read(struct counter_device *counter,
106b104137fd5f0 Kamel Bouhara 2020-07-06 162 struct counter_count
*count,
106b104137fd5f0 Kamel Bouhara 2020-07-06 163 struct counter_synapse
*synapse,
5251e7147d627fb William Breathitt Gray 2020-09-26 164 u8 *action)
106b104137fd5f0 Kamel Bouhara 2020-07-06 165 {
106b104137fd5f0 Kamel Bouhara 2020-07-06 166 struct mchp_tc_data *const priv =
counter->priv;
106b104137fd5f0 Kamel Bouhara 2020-07-06 167 u32 cmr;
106b104137fd5f0 Kamel Bouhara 2020-07-06 168
106b104137fd5f0 Kamel Bouhara 2020-07-06 169 regmap_read(priv->regmap,
ATMEL_TC_REG(priv->channel[0], CMR), &cmr);
106b104137fd5f0 Kamel Bouhara 2020-07-06 170
5251e7147d627fb William Breathitt Gray 2020-09-26 171 *action =
COUNTER_SYNAPSE_ACTION_NONE;
106b104137fd5f0 Kamel Bouhara 2020-07-06 172
106b104137fd5f0 Kamel Bouhara 2020-07-06 @173 if (cmr &
ATMEL_TC_ETRGEDG_NONE)
^^^^^^^^^^^^^^^^^^^^^^^^^^^
I'm guessing ATMEL_TC_ETRGEDG_NONE is zero and that's why Smatch thinks
this can't possibly be true.
5251e7147d627fb William Breathitt Gray 2020-09-26 174 *action =
COUNTER_SYNAPSE_ACTION_NONE;
106b104137fd5f0 Kamel Bouhara 2020-07-06 175 else if (cmr &
ATMEL_TC_ETRGEDG_RISING)
5251e7147d627fb William Breathitt Gray 2020-09-26 176 *action =
COUNTER_SYNAPSE_ACTION_RISING_EDGE;
106b104137fd5f0 Kamel Bouhara 2020-07-06 177 else if (cmr &
ATMEL_TC_ETRGEDG_FALLING)
5251e7147d627fb William Breathitt Gray 2020-09-26 178 *action =
COUNTER_SYNAPSE_ACTION_FALLING_EDGE;
106b104137fd5f0 Kamel Bouhara 2020-07-06 179 else if (cmr &
ATMEL_TC_ETRGEDG_BOTH)
5251e7147d627fb William Breathitt Gray 2020-09-26 180 *action =
COUNTER_SYNAPSE_ACTION_BOTH_EDGES;
106b104137fd5f0 Kamel Bouhara 2020-07-06 181
106b104137fd5f0 Kamel Bouhara 2020-07-06 182 return 0;
106b104137fd5f0 Kamel Bouhara 2020-07-06 183 }
---
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