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staging: dgnc: remove useless variables 

The dgnc_major_serial_registered and dgnc_major_serial_registered
do not need to use to check whether the tty driver is registered or not.
These variables are used only in dgnc_cleanup_tty() function,
This function will be called normally with initialized board structure.
It means the dgnc_cleanup_tty() cannot be called with unregistered tty.

Signed-off-by: Daeseok Youn <daeseok.youn@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Daeseok Youn 2016-09-26 09:46:48 +09:00 committed by Greg Kroah-Hartman
parent 33ccb442aa
commit 1cd7c06213
2 changed files with 25 additions and 42 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/staging/dgnc/dgnc_driver.h
View File

@ -203,9 +203,6 @@ struct dgnc_board {
struct tty_driver *print_driver;
char print_name[200];
bool dgnc_major_serial_registered;
bool dgnc_major_transparent_print_registered;
u16 dpatype; /* The board "type",
* as defined by DPA
*/

64
drivers/staging/dgnc/dgnc_tty.c
View File

@ -204,15 +204,11 @@ int dgnc_tty_register(struct dgnc_board *brd)
*/
tty_set_operations(brd->serial_driver, &dgnc_tty_ops);
if (!brd->dgnc_major_serial_registered) {
/* Register tty devices */
rc = tty_register_driver(brd->serial_driver);
if (rc < 0) {
dev_dbg(&brd->pdev->dev,
"Can't register tty device (%d)\n", rc);
goto free_serial_driver;
}
brd->dgnc_major_serial_registered = true;
rc = tty_register_driver(brd->serial_driver);
if (rc < 0) {
dev_dbg(&brd->pdev->dev,
"Can't register tty device (%d)\n", rc);
goto free_serial_driver;
}
/*
@ -247,16 +243,12 @@ int dgnc_tty_register(struct dgnc_board *brd)
*/
tty_set_operations(brd->print_driver, &dgnc_tty_ops);
if (!brd->dgnc_major_transparent_print_registered) {
/* Register Transparent Print devices */
rc = tty_register_driver(brd->print_driver);
if (rc < 0) {
dev_dbg(&brd->pdev->dev,
"Can't register Transparent Print device(%d)\n",
rc);
goto free_print_driver;
}
brd->dgnc_major_transparent_print_registered = true;
rc = tty_register_driver(brd->print_driver);
if (rc < 0) {
dev_dbg(&brd->pdev->dev,
"Can't register Transparent Print device(%d)\n",
rc);
goto free_print_driver;
}
dgnc_BoardsByMajor[brd->serial_driver->major] = brd;
@ -396,29 +388,23 @@ void dgnc_cleanup_tty(struct dgnc_board *brd)
{
int i = 0;
if (brd->dgnc_major_serial_registered) {
dgnc_BoardsByMajor[brd->serial_driver->major] = NULL;
for (i = 0; i < brd->nasync; i++) {
if (brd->channels[i])
dgnc_remove_tty_sysfs(brd->channels[i]->
ch_tun.un_sysfs);
tty_unregister_device(brd->serial_driver, i);
}
tty_unregister_driver(brd->serial_driver);
brd->dgnc_major_serial_registered = false;
dgnc_BoardsByMajor[brd->serial_driver->major] = NULL;
for (i = 0; i < brd->nasync; i++) {
if (brd->channels[i])
dgnc_remove_tty_sysfs(brd->channels[i]->
ch_tun.un_sysfs);
tty_unregister_device(brd->serial_driver, i);
}
tty_unregister_driver(brd->serial_driver);
if (brd->dgnc_major_transparent_print_registered) {
dgnc_BoardsByMajor[brd->print_driver->major] = NULL;
for (i = 0; i < brd->nasync; i++) {
if (brd->channels[i])
dgnc_remove_tty_sysfs(brd->channels[i]->
ch_pun.un_sysfs);
tty_unregister_device(brd->print_driver, i);
}
tty_unregister_driver(brd->print_driver);
brd->dgnc_major_transparent_print_registered = false;
dgnc_BoardsByMajor[brd->print_driver->major] = NULL;
for (i = 0; i < brd->nasync; i++) {
if (brd->channels[i])
dgnc_remove_tty_sysfs(brd->channels[i]->
ch_pun.un_sysfs);
tty_unregister_device(brd->print_driver, i);
}
tty_unregister_driver(brd->print_driver);
put_tty_driver(brd->serial_driver);
put_tty_driver(brd->print_driver);