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authorLuca Ceresoli <luca@lucaceresoli.net>2017-09-07 14:28:28 -0700
committerDmitry Torokhov <dmitry.torokhov@gmail.com>2017-09-11 14:23:41 -0700
commit47014752829ed1b52fa6f876b381774ae530503c (patch)
treeab0ac28612c4920b26bcda337adf397eed563378 /drivers/input
parent4f1b461dd1dcb8f9333855cf7fa882fb9f068b16 (diff)
Input: edt-ft5x06 - fix access to non-existing register
reg_addr->reg_report_rate is supposed to exist in M06, not M09. The driver is written to skip avoids access to non-existing registers when the register address is NO_REGISTER (0xff). But reg_addr->reg_report_rate is initialized to 0x00 by devm_kzalloc() (in edt_ft5x06_ts_probe()) and not changed thereafter. So the checks do not work and an access to register 0x00 is done. Fix by setting reg_addr->reg_report_rate to NO_REGISTER. Also fix the only place where reg_report_rate is checked against zero instead of NO_REGISTER. Signed-off-by: Luca Ceresoli <luca@lucaceresoli.net> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Diffstat (limited to 'drivers/input')
-rw-r--r--drivers/input/touchscreen/edt-ft5x06.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/input/touchscreen/edt-ft5x06.c b/drivers/input/touchscreen/edt-ft5x06.c
index f872817e81e4..5bf63f76ddda 100644
--- a/drivers/input/touchscreen/edt-ft5x06.c
+++ b/drivers/input/touchscreen/edt-ft5x06.c
@@ -593,7 +593,7 @@ static int edt_ft5x06_work_mode(struct edt_ft5x06_ts_data *tsdata)
tsdata->gain);
edt_ft5x06_register_write(tsdata, reg_addr->reg_offset,
tsdata->offset);
- if (reg_addr->reg_report_rate)
+ if (reg_addr->reg_report_rate != NO_REGISTER)
edt_ft5x06_register_write(tsdata, reg_addr->reg_report_rate,
tsdata->report_rate);
@@ -874,6 +874,7 @@ edt_ft5x06_ts_set_regs(struct edt_ft5x06_ts_data *tsdata)
case M09:
reg_addr->reg_threshold = M09_REGISTER_THRESHOLD;
+ reg_addr->reg_report_rate = NO_REGISTER;
reg_addr->reg_gain = M09_REGISTER_GAIN;
reg_addr->reg_offset = M09_REGISTER_OFFSET;
reg_addr->reg_num_x = M09_REGISTER_NUM_X;

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