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| author | Eric Tashakkor <w36098@motorola.com> | 2014-07-09 15:42:22 -0500 |
|---|---|---|
| committer | ERIC TASHAKKOR <w36098@motorola.com> | 2014-07-10 13:20:41 +0000 |
| commit | 2f02ffa1a9d46c192d19fed48190beceb9b6ec21 (patch) | |
| tree | 5726951fcc89a14602cf5982e78cfb5cc8d26ef1 /drivers/misc/m4sensorhub_heartrate.c | |
| parent | e1dfac029c58558d572d68b18d4d2a89470de088 (diff) | |
| download | olio-linux-3.10-2f02ffa1a9d46c192d19fed48190beceb9b6ec21.tar.xz olio-linux-3.10-2f02ffa1a9d46c192d19fed48190beceb9b6ec21.zip | |
IKXCLOCK-2819 Add Mutex Protection to M4 Panic Handlers
Added mutex locking in panic restore handlers for all drivers to prevent
losing data when restoring after an M4 panic.
Added a mutex to the mpu9150 driver to prevent concurrent access issues
and loss of data during normal operation.
Change-Id: I9ad5595c632518093ad1aec86afc7a51d3cbbee3
Signed-off-by: Eric Tashakkor <w36098@motorola.com>
Diffstat (limited to 'drivers/misc/m4sensorhub_heartrate.c')
| -rw-r--r-- | drivers/misc/m4sensorhub_heartrate.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/misc/m4sensorhub_heartrate.c b/drivers/misc/m4sensorhub_heartrate.c index 6e45b134bba..f2876ce9cda 100644 --- a/drivers/misc/m4sensorhub_heartrate.c +++ b/drivers/misc/m4sensorhub_heartrate.c @@ -494,9 +494,11 @@ static void m4hrt_panic_restore(struct m4sensorhub_data *m4sensorhub, __func__); return; } + + mutex_lock(&(dd->mutex)); + size = m4sensorhub_reg_getsize(dd->m4, M4SH_REG_HEARTRATE_APSAMPLERATE); - err = m4sensorhub_reg_write(dd->m4, M4SH_REG_HEARTRATE_APSAMPLERATE, (char *)&dd->samplerate, m4sh_no_mask); if (err < 0) { @@ -505,6 +507,8 @@ static void m4hrt_panic_restore(struct m4sensorhub_data *m4sensorhub, m4hrt_err("%s: Wrote %d bytes instead of %d.\n", __func__, err, size); } + + mutex_unlock(&(dd->mutex)); } static int m4hrt_driver_init(struct init_calldata *p_arg) |