diff options
Diffstat (limited to 'drivers/hid/hid-ft260.c')
| -rw-r--r-- | drivers/hid/hid-ft260.c | 29 |
1 files changed, 16 insertions, 13 deletions
diff --git a/drivers/hid/hid-ft260.c b/drivers/hid/hid-ft260.c index a5751607ce24..f43a8406cb9a 100644 --- a/drivers/hid/hid-ft260.c +++ b/drivers/hid/hid-ft260.c @@ -201,7 +201,7 @@ struct ft260_i2c_write_request_report { u8 address; /* 7-bit I2C address */ u8 flag; /* I2C transaction condition */ u8 length; /* data payload length */ - u8 data[60]; /* data payload */ + u8 data[FT260_WR_DATA_MAX]; /* data payload */ } __packed; struct ft260_i2c_read_request_report { @@ -249,7 +249,10 @@ static int ft260_hid_feature_report_get(struct hid_device *hdev, ret = hid_hw_raw_request(hdev, report_id, buf, len, HID_FEATURE_REPORT, HID_REQ_GET_REPORT); - memcpy(data, buf, len); + if (likely(ret == len)) + memcpy(data, buf, len); + else if (ret >= 0) + ret = -EIO; kfree(buf); return ret; } @@ -298,7 +301,7 @@ static int ft260_xfer_status(struct ft260_device *dev) ret = ft260_hid_feature_report_get(hdev, FT260_I2C_STATUS, (u8 *)&report, sizeof(report)); - if (ret < 0) { + if (unlikely(ret < 0)) { hid_err(hdev, "failed to retrieve status: %d\n", ret); return ret; } @@ -429,6 +432,9 @@ static int ft260_smbus_write(struct ft260_device *dev, u8 addr, u8 cmd, struct ft260_i2c_write_request_report *rep = (struct ft260_i2c_write_request_report *)dev->write_buf; + if (data_len >= sizeof(rep->data)) + return -EINVAL; + rep->address = addr; rep->data[0] = cmd; rep->length = data_len + 1; @@ -721,10 +727,9 @@ static int ft260_get_system_config(struct hid_device *hdev, ret = ft260_hid_feature_report_get(hdev, FT260_SYSTEM_SETTINGS, (u8 *)cfg, len); - if (ret != len) { + if (ret < 0) { hid_err(hdev, "failed to retrieve system status\n"); - if (ret >= 0) - return -EIO; + return ret; } return 0; } @@ -777,8 +782,8 @@ static int ft260_byte_show(struct hid_device *hdev, int id, u8 *cfg, int len, int ret; ret = ft260_hid_feature_report_get(hdev, id, cfg, len); - if (ret != len && ret >= 0) - return -EIO; + if (ret < 0) + return ret; return scnprintf(buf, PAGE_SIZE, "%hi\n", *field); } @@ -789,8 +794,8 @@ static int ft260_word_show(struct hid_device *hdev, int id, u8 *cfg, int len, int ret; ret = ft260_hid_feature_report_get(hdev, id, cfg, len); - if (ret != len && ret >= 0) - return -EIO; + if (ret < 0) + return ret; return scnprintf(buf, PAGE_SIZE, "%hi\n", le16_to_cpu(*field)); } @@ -941,10 +946,8 @@ static int ft260_probe(struct hid_device *hdev, const struct hid_device_id *id) ret = ft260_hid_feature_report_get(hdev, FT260_CHIP_VERSION, (u8 *)&version, sizeof(version)); - if (ret != sizeof(version)) { + if (ret < 0) { hid_err(hdev, "failed to retrieve chip version\n"); - if (ret >= 0) - ret = -EIO; goto err_hid_close; } |