Hello Srinivas Kandagatla,
The patch 6adba21eb434: "soc: qcom: Add APR bus driver" from May 9,
2018, leads to the following static checker warning:
drivers/soc/qcom/apr.c:95 apr_callback()
warn: always true condition '(msg_type != 69864) => (0-u16max != 69864)'
drivers/soc/qcom/apr.c
61 static int apr_callback(struct rpmsg_device *rpdev, void *buf,
62 int len, void *priv, u32 addr)
63 {
64 struct apr *apr = dev_get_drvdata(&rpdev->dev);
65 uint16_t hdr_size, msg_type, ver, svc_id;
66 struct apr_device *svc = NULL;
67 struct apr_driver *adrv = NULL;
68 struct apr_resp_pkt resp;
69 struct apr_hdr *hdr;
70 unsigned long flags;
71
72 if (len <= APR_HDR_SIZE) {
73 dev_err(apr->dev, "APR: Improper apr pkt received:%p %d\n",
74 buf, len);
75 return -EINVAL;
76 }
77
78 hdr = buf;
79 ver = APR_HDR_FIELD_VER(hdr->hdr_field);
80 if (ver > APR_PKT_VER + 1)
81 return -EINVAL;
82
83 hdr_size = APR_HDR_FIELD_SIZE_BYTES(hdr->hdr_field);
84 if (hdr_size < APR_HDR_SIZE) {
85 dev_err(apr->dev, "APR: Wrong hdr size:%d\n", hdr_size);
86 return -EINVAL;
87 }
88
89 if (hdr->pkt_size < APR_HDR_SIZE || hdr->pkt_size != len) {
90 dev_err(apr->dev, "APR: Wrong paket size\n");
91 return -EINVAL;
92 }
93
94 msg_type = APR_HDR_FIELD_MT(hdr->hdr_field);
95 if (msg_type >= APR_MSG_TYPE_MAX && msg_type != APR_BASIC_RSP_RESULT) {
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
msg_type can't be APR_BASIC_RSP_RESULT (0x000110E8). Perhaps there is
a typo in the define?
96 dev_err(apr->dev, "APR: Wrong message type: %d\n", msg_type);
97 return -EINVAL;
98 }
99
regards,
dan carpenter
--
To unsubscribe from this list: send the line "unsubscribe linux-soc" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
