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Code Issues Releases Wiki Activity

greybus: es2: move APB log task into the es2_ap_dev struct

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If an APB has a logging task it is associated with that APB.  Move
the task pointer into the es2_ap_dev structure rather than having it
be a single global.

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
This commit is contained in:
Alex Elder 2015-10-27 22:18:38 -05:00 committed by Greg Kroah-Hartman
parent 4b1d82047e
commit 1482b3e1a8
1 changed files with 13 additions and 9 deletions
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22
drivers/staging/greybus/es2.c
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@ -31,7 +31,6 @@ MODULE_DEVICE_TABLE(usb, id_table);
#define APB1_LOG_SIZE SZ_16K
static struct dentry *apb1_log_dentry;
static struct dentry *apb1_log_enable_dentry;
static struct task_struct *apb1_log_task;
static DEFINE_KFIFO(apb1_log_fifo, char, APB1_LOG_SIZE);
/* Number of bulk in and bulk out couple */
@ -97,6 +96,8 @@ struct es2_cport_out {
* @cport_out_urb_cancelled: array of flags indicating whether the
* corresponding @cport_out_urb is being cancelled
* @cport_out_urb_lock: locks the @cport_out_urb_busy "list"
*
* @apb1_log_task: task pointer for logging thread
*/
struct es2_ap_dev {
struct usb_device *usb_dev;
@ -111,6 +112,8 @@ struct es2_ap_dev {
spinlock_t cport_out_urb_lock;
int *cport_to_ep;
struct task_struct *apb1_log_task;
};
/**
@ -677,12 +680,12 @@ static const struct file_operations apb1_log_fops = {
static void usb_log_enable(struct es2_ap_dev *es2)
{
if (!IS_ERR_OR_NULL(apb1_log_task))
if (!IS_ERR_OR_NULL(es2->apb1_log_task))
return;
/* get log from APB1 */
apb1_log_task = kthread_run(apb1_log_poll, es2, "apb1_log");
if (IS_ERR(apb1_log_task))
es2->apb1_log_task = kthread_run(apb1_log_poll, es2, "apb1_log");
if (IS_ERR(es2->apb1_log_task))
return;
apb1_log_dentry = debugfs_create_file("apb1_log", S_IRUGO,
gb_debugfs_get(), NULL,
@ -691,20 +694,21 @@ static void usb_log_enable(struct es2_ap_dev *es2)
static void usb_log_disable(struct es2_ap_dev *es2)
{
if (IS_ERR_OR_NULL(apb1_log_task))
if (IS_ERR_OR_NULL(es2->apb1_log_task))
return;
debugfs_remove(apb1_log_dentry);
apb1_log_dentry = NULL;
kthread_stop(apb1_log_task);
apb1_log_task = NULL;
kthread_stop(es2->apb1_log_task);
es2->apb1_log_task = NULL;
}
static ssize_t apb1_log_enable_read(struct file *f, char __user *buf,
size_t count, loff_t *ppos)
{
int enable = !IS_ERR_OR_NULL(apb1_log_task);
struct es2_ap_dev *es2 = f->f_inode->i_private;
int enable = !IS_ERR_OR_NULL(es2->apb1_log_task);
char tmp_buf[3];
sprintf(tmp_buf, "%d\n", enable);
@ -716,7 +720,7 @@ static ssize_t apb1_log_enable_write(struct file *f, const char __user *buf,
{
int enable;
ssize_t retval;
struct es2_ap_dev *es2 = (struct es2_ap_dev *)f->f_inode->i_private;
struct es2_ap_dev *es2 = f->f_inode->i_private;
retval = kstrtoint_from_user(buf, count, 10, &enable);
if (retval)