diff options
Diffstat (limited to 'drivers/hid')
| -rw-r--r-- | drivers/hid/hid-ft260.c | 36 |
1 files changed, 24 insertions, 12 deletions
diff --git a/drivers/hid/hid-ft260.c b/drivers/hid/hid-ft260.c index 8d6d2a19b9ed..8b6ebc5228eb 100644 --- a/drivers/hid/hid-ft260.c +++ b/drivers/hid/hid-ft260.c @@ -464,7 +464,7 @@ static int ft260_i2c_read(struct ft260_device *dev, u8 addr, u8 *data, u16 len, u8 flag) { u16 rd_len; - int timeout, ret; + int timeout, ret = 0; struct ft260_i2c_read_request_report rep; struct hid_device *hdev = dev->hdev; @@ -480,10 +480,6 @@ static int ft260_i2c_read(struct ft260_device *dev, u8 addr, u8 *data, rd_len = FT260_RD_DATA_MAX; } - dev->read_idx = 0; - dev->read_buf = data; - dev->read_len = rd_len; - rep.report = FT260_I2C_READ_REQ; rep.length = cpu_to_le16(rd_len); rep.address = addr; @@ -494,22 +490,30 @@ static int ft260_i2c_read(struct ft260_device *dev, u8 addr, u8 *data, reinit_completion(&dev->wait); + dev->read_idx = 0; + dev->read_buf = data; + dev->read_len = rd_len; + ret = ft260_hid_output_report(hdev, (u8 *)&rep, sizeof(rep)); if (ret < 0) { hid_err(hdev, "%s: failed with %d\n", __func__, ret); - return ret; + goto ft260_i2c_read_exit; } timeout = msecs_to_jiffies(5000); if (!wait_for_completion_timeout(&dev->wait, timeout)) { + ret = -ETIMEDOUT; ft260_i2c_reset(hdev); - return -ETIMEDOUT; + goto ft260_i2c_read_exit; } + dev->read_buf = NULL; + ret = ft260_xfer_status(dev); if (ret < 0) { + ret = -EIO; ft260_i2c_reset(hdev); - return -EIO; + goto ft260_i2c_read_exit; } len -= rd_len; @@ -518,7 +522,9 @@ static int ft260_i2c_read(struct ft260_device *dev, u8 addr, u8 *data, } while (len > 0); - return 0; +ft260_i2c_read_exit: + dev->read_buf = NULL; + return ret; } /* @@ -1036,6 +1042,13 @@ static int ft260_raw_event(struct hid_device *hdev, struct hid_report *report, ft260_dbg("i2c resp: rep %#02x len %d\n", xfer->report, xfer->length); + if ((dev->read_buf == NULL) || + (xfer->length > dev->read_len - dev->read_idx)) { + hid_err(hdev, "unexpected report %#02x, length %d\n", + xfer->report, xfer->length); + return -1; + } + memcpy(&dev->read_buf[dev->read_idx], &xfer->data, xfer->length); dev->read_idx += xfer->length; @@ -1044,10 +1057,9 @@ static int ft260_raw_event(struct hid_device *hdev, struct hid_report *report, complete(&dev->wait); } else { - hid_err(hdev, "unknown report: %#02x\n", xfer->report); - return 0; + hid_err(hdev, "unhandled report %#02x\n", xfer->report); } - return 1; + return 0; } static struct hid_driver ft260_driver = { |