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| author | Emanuele Ghidoli <emanuele.ghidoli@toradex.com> | 2024-08-05 11:55:11 +0300 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2024-08-05 20:39:20 +0300 |
| commit | 208989744a6f01bed86968473312d4e650e600b3 (patch) | |
| tree | ad7160be1c67cbd40fa10575d5cf70805dc79112 /drivers | |
| parent | 7d0b18cd5dc7429917812963611d961fd93cb44d (diff) | |
| download | linux-208989744a6f01bed86968473312d4e650e600b3.tar.xz | |
Input: ilitek_ts_i2c - add report id message validation
Ensure that the touchscreen response has correct "report id" byte
before processing the touch data and discard other messages.
Fixes: 42370681bd46 ("Input: Add support for ILITEK Lego Series")
Signed-off-by: Emanuele Ghidoli <emanuele.ghidoli@toradex.com>
Signed-off-by: Francesco Dolcini <francesco.dolcini@toradex.com>
Link: https://lore.kernel.org/r/20240805085511.43955-3-francesco@dolcini.it
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/input/touchscreen/ilitek_ts_i2c.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/input/touchscreen/ilitek_ts_i2c.c b/drivers/input/touchscreen/ilitek_ts_i2c.c index e1849185e18c..5a807ad72319 100644 --- a/drivers/input/touchscreen/ilitek_ts_i2c.c +++ b/drivers/input/touchscreen/ilitek_ts_i2c.c @@ -37,6 +37,8 @@ #define ILITEK_TP_CMD_GET_MCU_VER 0x61 #define ILITEK_TP_CMD_GET_IC_MODE 0xC0 +#define ILITEK_TP_I2C_REPORT_ID 0x48 + #define REPORT_COUNT_ADDRESS 61 #define ILITEK_SUPPORT_MAX_POINT 40 @@ -163,6 +165,11 @@ static int ilitek_process_and_report_v6(struct ilitek_ts_data *ts) return error; } + if (buf[0] != ILITEK_TP_I2C_REPORT_ID) { + dev_err(dev, "get touch info failed. Wrong id: 0x%02X\n", buf[0]); + return -EINVAL; + } + report_max_point = buf[REPORT_COUNT_ADDRESS]; if (report_max_point > ts->max_tp) { dev_err(dev, "FW report max point:%d > panel info. max:%d\n", |