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tegra: hwpm: add device_opened flag

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Add device_opened flag to indicate device node open success.
Use device_opened flag to allow execution of IOCTL and device teardown
functionality.

Jira THWPM-41

Change-Id: I218a45abed1de9f314cba696fd86c9bd8596cacc
Signed-off-by: Vedashree Vidwans <vvidwans@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvidia/+/2675514
Reviewed-by: svcacv <svcacv@nvidia.com>
Reviewed-by: svc_kernel_abi <svc_kernel_abi@nvidia.com>
Reviewed-by: Seema Khowala <seemaj@nvidia.com>
Reviewed-by: Vasuki Shankar <vasukis@nvidia.com>
GVS: Gerrit_Virtual_Submit
This commit is contained in:
Vedashree Vidwans
2022-02-25 23:47:25 -08:00
committed by mobile promotions
parent 9f2a83a828
commit 778356e12d
2 changed files with 16 additions and 0 deletions
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1
include/tegra_hwpm.h
View File

@@ -244,6 +244,7 @@ struct tegra_soc_hwpm {
/* SW State */
bool bind_completed;
bool device_opened;
u64 full_alist_size;
atomic_t hwpm_in_use;

15
os/linux/tegra_hwpm_ioctl.c
View File

@@ -343,6 +343,12 @@ static long tegra_hwpm_ioctl(struct file *file,
goto fail;
}
if (!hwpm->device_opened) {
tegra_hwpm_err(hwpm, "Device open failed, can't process IOCTL");
ret = -ENODEV;
goto fail;
}
/* Only allocate a buffer if the IOCTL needs a buffer */
if (!(ioc_dir & _IOC_NONE)) {
arg_copy = kzalloc(arg_size, GFP_KERNEL);
@@ -486,6 +492,8 @@ static int tegra_hwpm_open(struct inode *inode, struct file *filp)
goto fail;
}
hwpm->device_opened = true;
return 0;
fail:
ret = tegra_hwpm_release_hw(hwpm);
@@ -531,6 +539,11 @@ static int tegra_hwpm_release(struct inode *inode, struct file *filp)
return 0;
}
if (hwpm->device_opened == false) {
/* Device was not opened, do nothing */
return 0;
}
ret = tegra_hwpm_disable_triggers(hwpm);
if (ret < 0) {
tegra_hwpm_err(hwpm, "Failed to disable PMA triggers");
@@ -570,6 +583,8 @@ static int tegra_hwpm_release(struct inode *inode, struct file *filp)
}
clk_disable_unprepare(hwpm->la_clk);
}
hwpm->device_opened = false;
fail:
return ret;
}