diff options
| author | Andrew Duggan <aduggan@synaptics.com> | 2016-11-09 01:46:20 +0100 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2016-11-09 02:12:06 +0100 |
| commit | 6d0dbeae71f074c67b081eae45cd58fa39dfda2e (patch) | |
| tree | 4ab16cc8a6cc37d0e9584dfe5ba764a88dabd1f8 /drivers/input/rmi4/rmi_f12.c | |
| parent | Input: synaptics-rmi4 - move IRQ handling to rmi_driver (diff) | |
| download | linux-6d0dbeae71f074c67b081eae45cd58fa39dfda2e.tar.xz linux-6d0dbeae71f074c67b081eae45cd58fa39dfda2e.zip | |
Input: synaptics-rmi4 - handle incomplete input data
Commit 5b65c2a02966 ("HID: rmi: check sanity of the incoming report") added
support for handling incomplete HID reports do to the input data being
corrupted in transit. This patch reimplements this functionality in the
function drivers so they can handle getting less valid data then they
expect.
Signed-off-by: Andrew Duggan <aduggan@synaptics.com>
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Diffstat (limited to 'drivers/input/rmi4/rmi_f12.c')
| -rw-r--r-- | drivers/input/rmi4/rmi_f12.c | 23 |
1 files changed, 17 insertions, 6 deletions
diff --git a/drivers/input/rmi4/rmi_f12.c b/drivers/input/rmi4/rmi_f12.c index 332c02f0b107..767ac7920c75 100644 --- a/drivers/input/rmi4/rmi_f12.c +++ b/drivers/input/rmi4/rmi_f12.c @@ -26,6 +26,8 @@ enum rmi_f12_object_type { RMI_F12_OBJECT_SMALL_OBJECT = 0x0D, }; +#define F12_DATA1_BYTES_PER_OBJ 8 + struct f12_data { struct rmi_2d_sensor sensor; struct rmi_2d_sensor_platform_data sensor_pdata; @@ -146,12 +148,16 @@ static int rmi_f12_read_sensor_tuning(struct f12_data *f12) return 0; } -static void rmi_f12_process_objects(struct f12_data *f12, u8 *data1) +static void rmi_f12_process_objects(struct f12_data *f12, u8 *data1, int size) { int i; struct rmi_2d_sensor *sensor = &f12->sensor; + int objects = f12->data1->num_subpackets; + + if ((f12->data1->num_subpackets * F12_DATA1_BYTES_PER_OBJ) > size) + objects = size / F12_DATA1_BYTES_PER_OBJ; - for (i = 0; i < f12->data1->num_subpackets; i++) { + for (i = 0; i < objects; i++) { struct rmi_2d_sensor_abs_object *obj = &sensor->objs[i]; obj->type = RMI_2D_OBJECT_NONE; @@ -182,7 +188,7 @@ static void rmi_f12_process_objects(struct f12_data *f12, u8 *data1) rmi_2d_sensor_abs_process(sensor, obj, i); - data1 += 8; + data1 += F12_DATA1_BYTES_PER_OBJ; } if (sensor->kernel_tracking) @@ -192,7 +198,7 @@ static void rmi_f12_process_objects(struct f12_data *f12, u8 *data1) sensor->nbr_fingers, sensor->dmax); - for (i = 0; i < sensor->nbr_fingers; i++) + for (i = 0; i < objects; i++) rmi_2d_sensor_abs_report(sensor, &sensor->objs[i], i); } @@ -203,10 +209,15 @@ static int rmi_f12_attention(struct rmi_function *fn, struct rmi_device *rmi_dev = fn->rmi_dev; struct f12_data *f12 = dev_get_drvdata(&fn->dev); struct rmi_2d_sensor *sensor = &f12->sensor; + int valid_bytes = sensor->pkt_size; if (rmi_dev->xport->attn_data) { + if (sensor->attn_size > rmi_dev->xport->attn_size) + valid_bytes = rmi_dev->xport->attn_size; + else + valid_bytes = sensor->attn_size; memcpy(sensor->data_pkt, rmi_dev->xport->attn_data, - sensor->attn_size); + valid_bytes); rmi_dev->xport->attn_data += sensor->attn_size; rmi_dev->xport->attn_size -= sensor->attn_size; } else { @@ -221,7 +232,7 @@ static int rmi_f12_attention(struct rmi_function *fn, if (f12->data1) rmi_f12_process_objects(f12, - &sensor->data_pkt[f12->data1_offset]); + &sensor->data_pkt[f12->data1_offset], valid_bytes); input_mt_sync_frame(sensor->input); |