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staging: dgnc: introduce find_board_by_major() 

It was used to get a board structure with dgnc_BoardsByMajor array.
But this driver already has the array for managing initialized board
as dgap_board[]. It can be used for searching the board structure
by major number.

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 09:47:20 +09:00 committed by Greg Kroah-Hartman
parent 1cd7c06213
commit 9f7a104c2b
1 changed files with 19 additions and 6 deletions
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25
drivers/staging/dgnc/dgnc_tty.c
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@ -45,7 +45,6 @@
/*
* internal variables
*/
static struct dgnc_board *dgnc_BoardsByMajor[256];
static unsigned char *dgnc_TmpWriteBuf;
/*
@ -251,8 +250,6 @@ int dgnc_tty_register(struct dgnc_board *brd)
goto free_print_driver;
}
dgnc_BoardsByMajor[brd->serial_driver->major] = brd;
return 0;
free_print_driver:
@ -388,7 +385,6 @@ void dgnc_cleanup_tty(struct dgnc_board *brd)
{
int i = 0;
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]->
@ -397,7 +393,6 @@ void dgnc_cleanup_tty(struct dgnc_board *brd)
}
tty_unregister_driver(brd->serial_driver);
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]->
@ -935,6 +930,24 @@ void dgnc_wakeup_writes(struct channel_t *ch)
spin_unlock_irqrestore(&ch->ch_lock, flags);
}
struct dgnc_board *find_board_by_major(unsigned int major)
{
int i;
for (i = 0; i < MAXBOARDS; i++) {
struct dgnc_board *brd = dgnc_board[i];
if (!brd)
return NULL;
if (major == brd->serial_driver->major ||
major == brd->print_driver->major)
return brd;
}
return NULL;
}
/************************************************************************
*
* TTY Entry points and helper functions
@ -964,7 +977,7 @@ static int dgnc_tty_open(struct tty_struct *tty, struct file *file)
return -ENXIO;
/* Get board pointer from our array of majors we have allocated */
brd = dgnc_BoardsByMajor[major];
brd = find_board_by_major(major);
if (!brd)
return -ENXIO;