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| author | Hans de Goede <hdegoede@redhat.com> | 2018-04-14 17:06:45 +0200 |
|---|---|---|
| committer | Jiri Kosina <jkosina@suse.cz> | 2018-04-25 10:52:42 +0200 |
| commit | 749ab300d41bcdbb8edf776d20e9a9891e79eba4 (patch) | |
| tree | 9225b3e02656b05e00dfdfabbd6252b4dfcffa72 /drivers/hid/intel-ish-hid | |
| parent | 37ba3c350e64adcbdd483e81bf194c05d9573515 (diff) | |
| download | linux-749ab300d41bcdbb8edf776d20e9a9891e79eba4.tar.gz linux-749ab300d41bcdbb8edf776d20e9a9891e79eba4.tar.bz2 linux-749ab300d41bcdbb8edf776d20e9a9891e79eba4.zip | |
HID: intel_ish-hid: Stop using a static local buffer in get_report()
hid_ishtp_get_report() may be called by multiple callers at the same
time, causing trouble with the static local buffer used.
Also there is no reason to use a non stack buffer, the buffer is tiny
and ishtp_cl_send() copies its contents so the lifetime is not an
issue either.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'drivers/hid/intel-ish-hid')
| -rw-r--r-- | drivers/hid/intel-ish-hid/ishtp-hid-client.c | 16 |
1 files changed, 6 insertions, 10 deletions
diff --git a/drivers/hid/intel-ish-hid/ishtp-hid-client.c b/drivers/hid/intel-ish-hid/ishtp-hid-client.c index 6ce1856bb368..acc2536c8094 100644 --- a/drivers/hid/intel-ish-hid/ishtp-hid-client.c +++ b/drivers/hid/intel-ish-hid/ishtp-hid-client.c @@ -412,9 +412,7 @@ void hid_ishtp_get_report(struct hid_device *hid, int report_id, { struct ishtp_hid_data *hid_data = hid->driver_data; struct ishtp_cl_data *client_data = hid_data->client_data; - static unsigned char buf[10]; - unsigned int len; - struct hostif_msg_to_sensor *msg = (struct hostif_msg_to_sensor *)buf; + struct hostif_msg_to_sensor msg = {}; int rv; int i; @@ -426,14 +424,11 @@ void hid_ishtp_get_report(struct hid_device *hid, int report_id, return; } - len = sizeof(struct hostif_msg_to_sensor); - - memset(msg, 0, sizeof(struct hostif_msg_to_sensor)); - msg->hdr.command = (report_type == HID_FEATURE_REPORT) ? + msg.hdr.command = (report_type == HID_FEATURE_REPORT) ? HOSTIF_GET_FEATURE_REPORT : HOSTIF_GET_INPUT_REPORT; for (i = 0; i < client_data->num_hid_devices; ++i) { if (hid == client_data->hid_sensor_hubs[i]) { - msg->hdr.device_id = + msg.hdr.device_id = client_data->hid_devices[i].dev_id; break; } @@ -442,8 +437,9 @@ void hid_ishtp_get_report(struct hid_device *hid, int report_id, if (i == client_data->num_hid_devices) return; - msg->report_id = report_id; - rv = ishtp_cl_send(client_data->hid_ishtp_cl, buf, len); + msg.report_id = report_id; + rv = ishtp_cl_send(client_data->hid_ishtp_cl, (uint8_t *)&msg, + sizeof(msg)); if (rv) hid_ishtp_trace(client_data, "%s hid %p send failed\n", __func__, hid); |