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| author | Seshendra Gadagottu <sgadagottu@nvidia.com> | 2012-02-20 12:45:10 +0530 |
|---|---|---|
| committer | Dan Willemsen <dwillemsen@nvidia.com> | 2013-09-14 01:38:01 -0700 |
| commit | 4bb0482c35c15ba7461baee872395081c886033a (patch) | |
| tree | 7abe842c3d72ba9dc86b065c9db0ac8f2092b9f2 /arch/arm/mach-tegra/baseband-xmm-power.c | |
| parent | 01f90c940e23ee8d5b3d9bcf0d1a81c650c6bd1b (diff) | |
arm: tegra: comms: add mutex for on/off switch
Mutex protection is added on xmm_onoff
Bug 938553
Change-Id: I260847861a56f612f06c20cd7429c19c9001ac99
Signed-off-by: Xin Xie <xxie@nvidia.com>
Reviewed-on: http://git-master/r/84751
(cherry picked from commit 14ac86297c4faa6a9cbf95877b782c997698347c)
Reviewed-on: http://git-master/r/87506
Reviewed-by: Seshendra Gadagottu <sgadagottu@nvidia.com>
Tested-by: Seshendra Gadagottu <sgadagottu@nvidia.com>
Reviewed-by: Steve Lin <stlin@nvidia.com>
Rebase-Id: R2717dd8f5002f721a60b303ecba1a65056f38da1
Diffstat (limited to 'arch/arm/mach-tegra/baseband-xmm-power.c')
| -rw-r--r-- | arch/arm/mach-tegra/baseband-xmm-power.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/arm/mach-tegra/baseband-xmm-power.c b/arch/arm/mach-tegra/baseband-xmm-power.c index 1bdaf8046390..534ba49939cf 100644 --- a/arch/arm/mach-tegra/baseband-xmm-power.c +++ b/arch/arm/mach-tegra/baseband-xmm-power.c @@ -104,6 +104,7 @@ static struct work_struct autopm_resume_work; static bool wakeup_pending; static bool modem_sleep_flag; static spinlock_t xmm_lock; +static DEFINE_MUTEX(xmm_onoff_mutex); static void baseband_xmm_power_L2_resume(void); static int baseband_xmm_power_driver_handle_resume( @@ -253,11 +254,14 @@ static ssize_t baseband_xmm_onoff(struct device *dev, int size; struct platform_device *device = to_platform_device(dev); + mutex_lock(&xmm_onoff_mutex); + pr_debug("%s\n", __func__); /* check input */ if (buf == NULL) { pr_err("%s: buf NULL\n", __func__); + mutex_unlock(&xmm_onoff_mutex); return -EINVAL; } pr_debug("%s: count=%d\n", __func__, count); @@ -266,6 +270,7 @@ static ssize_t baseband_xmm_onoff(struct device *dev, size = sscanf(buf, "%d", &power_onoff); if (size != 1) { pr_err("%s: size=%d -EINVAL\n", __func__, size); + mutex_unlock(&xmm_onoff_mutex); return -EINVAL; } pr_debug("%s power_onoff=%d\n", __func__, power_onoff); @@ -274,6 +279,9 @@ static ssize_t baseband_xmm_onoff(struct device *dev, baseband_xmm_power_off(device); else if (power_onoff == 1) baseband_xmm_power_on(device); + + mutex_unlock(&xmm_onoff_mutex); + return count; } |