diff options
| author | Christophe Kerello | 2017-10-17 11:21:32 +0200 |
|---|---|---|
| committer | Heiko Schocher | 2017-10-17 11:28:27 +0200 |
| commit | 81c484376353251ba13b7ea987a15a896b3d106a (patch) | |
| tree | 6200955aadb8e05b72c4fa97b7e768c2c73b95d8 /drivers | |
| parent | c4e5990ad20e9d387dd0f1e6649c7676b869bc0d (diff) | |
i2c: stm32f7_i2c: fix data abort
As "v" is a local variable in stm32_i2c_choose_solution()
"v" has to be copied into "s" to avoid data abort in
stm32_i2c_compute_timing().
Signed-off-by: Christophe Kerello <christophe.kerello@st.com>
Reviewed-by: Patrick DELAUNAY <patrick.delaunay@st.com>
Signed-off-by: Patrice Chotard <patrice.chotard@st.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/i2c/stm32f7_i2c.c | 21 |
1 files changed, 11 insertions, 10 deletions
diff --git a/drivers/i2c/stm32f7_i2c.c b/drivers/i2c/stm32f7_i2c.c index 196f2365ea5..346748d4331 100644 --- a/drivers/i2c/stm32f7_i2c.c +++ b/drivers/i2c/stm32f7_i2c.c @@ -571,6 +571,7 @@ static int stm32_i2c_choose_solution(struct stm32_i2c_setup *setup, u32 dnf_delay; u32 tsync; u16 l, h; + bool sol_found = false; int ret = 0; af_delay_min = setup->analog_filter ? @@ -619,14 +620,15 @@ static int stm32_i2c_choose_solution(struct stm32_i2c_setup *setup, clk_error_prev = clk_error; v->scll = l; v->sclh = h; - s = v; + sol_found = true; + memcpy(s, v, sizeof(*s)); } } } } } - if (!s) { + if (!sol_found) { pr_err("%s: no solution at all\n", __func__); ret = -EPERM; } @@ -638,7 +640,7 @@ static int stm32_i2c_compute_timing(struct stm32_i2c_priv *i2c_priv, struct stm32_i2c_setup *setup, struct stm32_i2c_timings *output) { - struct stm32_i2c_timings *v, *_v, *s; + struct stm32_i2c_timings *v, *_v, s; struct list_head solutions; int ret; @@ -669,21 +671,20 @@ static int stm32_i2c_compute_timing(struct stm32_i2c_priv *i2c_priv, return -EINVAL; } - s = NULL; INIT_LIST_HEAD(&solutions); ret = stm32_i2c_compute_solutions(setup, &solutions); if (ret) goto exit; - ret = stm32_i2c_choose_solution(setup, &solutions, s); + ret = stm32_i2c_choose_solution(setup, &solutions, &s); if (ret) goto exit; - output->presc = s->presc; - output->scldel = s->scldel; - output->sdadel = s->sdadel; - output->scll = s->scll; - output->sclh = s->sclh; + output->presc = s.presc; + output->scldel = s.scldel; + output->sdadel = s.sdadel; + output->scll = s.scll; + output->sclh = s.sclh; debug("%s: Presc: %i, scldel: %i, sdadel: %i, scll: %i, sclh: %i\n", __func__, output->presc, |