mirrors/linux-stable
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2024-09-04 18:09:57 +00:00
Code Issues Releases Wiki Activity

accel/habanalabs: rename fd_list to hpriv_list

Browse source 
Every time an FD is returned to the user, the driver adds
a corresponding private structure to the list.
Yet, it's still a list of private structures rather than of FDs.
Remove, as well, an unnecessary comment.

Signed-off-by: Koby Elbaz <kelbaz@habana.ai>
Reviewed-by: Oded Gabbay <ogabbay@kernel.org>
Signed-off-by: Oded Gabbay <ogabbay@kernel.org>
This commit is contained in:
Koby Elbaz 2023-06-06 14:44:57 +03:00 committed by Oded Gabbay
parent 942f18c56d
commit 964b1f675d
1 changed files with 19 additions and 24 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

43
drivers/accel/habanalabs/common/device.c
View file

@ -1304,18 +1304,18 @@ int hl_device_resume(struct hl_device *hdev)
static int device_kill_open_processes(struct hl_device *hdev, u32 timeout, bool control_dev)
{
struct task_struct *task = NULL;
struct list_head *fd_list;
struct hl_fpriv *hpriv;
struct mutex *fd_lock;
struct list_head *hpriv_list;
struct hl_fpriv *hpriv;
struct mutex *hpriv_lock;
u32 pending_cnt;
fd_lock = control_dev ? &hdev->fpriv_ctrl_list_lock : &hdev->fpriv_list_lock;
fd_list = control_dev ? &hdev->fpriv_ctrl_list : &hdev->fpriv_list;
hpriv_lock = control_dev ? &hdev->fpriv_ctrl_list_lock : &hdev->fpriv_list_lock;
hpriv_list = control_dev ? &hdev->fpriv_ctrl_list : &hdev->fpriv_list;
/* Giving time for user to close FD, and for processes that are inside
* hl_device_open to finish
*/
if (!list_empty(fd_list))
if (!list_empty(hpriv_list))
ssleep(1);
if (timeout) {
@ -1331,12 +1331,12 @@ static int device_kill_open_processes(struct hl_device *hdev, u32 timeout, bool
}
}
mutex_lock(fd_lock);
mutex_lock(hpriv_lock);
/* This section must be protected because we are dereferencing
* pointers that are freed if the process exits
*/
list_for_each_entry(hpriv, fd_list, dev_node) {
list_for_each_entry(hpriv, hpriv_list, dev_node) {
task = get_pid_task(hpriv->taskpid, PIDTYPE_PID);
if (task) {
dev_info(hdev->dev, "Killing user process pid=%d\n",
@ -1346,18 +1346,13 @@ static int device_kill_open_processes(struct hl_device *hdev, u32 timeout, bool
put_task_struct(task);
} else {
/*
* If we got here, it means that process was killed from outside the driver
* right after it started looping on fd_list and before get_pid_task, thus
* we don't need to kill it.
*/
dev_dbg(hdev->dev,
"Can't get task struct for user process %d, assuming process was killed from outside the driver\n",
"Can't get task struct for user process %d, process was killed from outside the driver\n",
pid_nr(hpriv->taskpid));
}
}
mutex_unlock(fd_lock);
mutex_unlock(hpriv_lock);
/*
* We killed the open users, but that doesn't mean they are closed.
@ -1369,7 +1364,7 @@ static int device_kill_open_processes(struct hl_device *hdev, u32 timeout, bool
*/
wait_for_processes:
while ((!list_empty(fd_list)) && (pending_cnt)) {
while ((!list_empty(hpriv_list)) && (pending_cnt)) {
dev_dbg(hdev->dev,
"Waiting for all unmap operations to finish before hard reset\n");
@ -1379,7 +1374,7 @@ static int device_kill_open_processes(struct hl_device *hdev, u32 timeout, bool
}
/* All processes exited successfully */
if (list_empty(fd_list))
if (list_empty(hpriv_list))
return 0;
/* Give up waiting for processes to exit */
@ -1393,17 +1388,17 @@ static int device_kill_open_processes(struct hl_device *hdev, u32 timeout, bool
static void device_disable_open_processes(struct hl_device *hdev, bool control_dev)
{
struct list_head *fd_list;
struct list_head *hpriv_list;
struct hl_fpriv *hpriv;
struct mutex *fd_lock;
struct mutex *hpriv_lock;
fd_lock = control_dev ? &hdev->fpriv_ctrl_list_lock : &hdev->fpriv_list_lock;
fd_list = control_dev ? &hdev->fpriv_ctrl_list : &hdev->fpriv_list;
hpriv_lock = control_dev ? &hdev->fpriv_ctrl_list_lock : &hdev->fpriv_list_lock;
hpriv_list = control_dev ? &hdev->fpriv_ctrl_list : &hdev->fpriv_list;
mutex_lock(fd_lock);
list_for_each_entry(hpriv, fd_list, dev_node)
mutex_lock(hpriv_lock);
list_for_each_entry(hpriv, hpriv_list, dev_node)
hpriv->hdev = NULL;
mutex_unlock(fd_lock);
mutex_unlock(hpriv_lock);
}
static void send_disable_pci_access(struct hl_device *hdev, u32 flags)