Hello Lina Iyer,
The patch 48dbb0f02d34: "drivers: qcom: rpmh-rsc: allow invalidation
of sleep/wake TCS" from Jun 20, 2018, leads to the following static
checker warning:
drivers/soc/qcom/rpmh-rsc.c:111 tcs_invalidate()
warn: 'tcs' isn't an ERR_PTR
drivers/soc/qcom/rpmh-rsc.c
100 static struct tcs_group *get_tcs_of_type(struct rsc_drv *drv, int type)
101 {
102 return &drv->tcs[type];
103 }
104
105 static int tcs_invalidate(struct rsc_drv *drv, int type)
106 {
107 int m;
108 struct tcs_group *tcs;
109
110 tcs = get_tcs_of_type(drv, type);
111 if (IS_ERR(tcs))
112 return PTR_ERR(tcs);
get_tcs_of_type() always returns valid pointers. Maybe just remove the
condition?
113
114 spin_lock(&tcs->lock);
115 if (bitmap_empty(tcs->slots, MAX_TCS_SLOTS)) {
116 spin_unlock(&tcs->lock);
117 return 0;
118 }
119
120 for (m = tcs->offset; m < tcs->offset + tcs->num_tcs; m++) {
121 if (!tcs_is_free(drv, m)) {
122 spin_unlock(&tcs->lock);
123 return -EAGAIN;
124 }
125 write_tcs_reg_sync(drv, RSC_DRV_CMD_ENABLE, m, 0);
126 }
127 bitmap_zero(tcs->slots, MAX_TCS_SLOTS);
128 spin_unlock(&tcs->lock);
129
130 return 0;
131 }
See also:
drivers/soc/qcom/rpmh-rsc.c:178 get_tcs_for_msg() warn: 'tcs' isn't an ERR_PTR
drivers/soc/qcom/rpmh-rsc.c:180 get_tcs_for_msg() warn: 'tcs' isn't an ERR_PTR
regards,
dan carpenter
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