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Now checks if the driver is already opened, and return B_BUSY if true.

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git-svn-id: file:///srv/svn/repos/haiku/trunk/current@9066 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Stefano Ceccherini 2004-09-27 07:20:57 +00:00
parent 3278758030
commit b0881688c3
1 changed files with 8 additions and 0 deletions
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8
src/add-ons/kernel/drivers/arch/x86/ps2mouse/ps2mouse.c
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@ -86,6 +86,7 @@ static bigtime_t sLastClickTime;
static bigtime_t sClickSpeed;
static int32 sClickCount;
static int sButtonsState;
static int32 sOpenMask;
/////////////////////////////////////////////////////////////////////////
// ps2 protocol stuff
@ -360,6 +361,9 @@ mouse_open(const char *name, uint32 flags, void **cookie)
status_t status;
TRACE(("mouse_open()\n"));
if (atomic_or(&sOpenMask, 1) != 0)
return B_BUSY;
*cookie = NULL;
write_command_byte(PS2_CMD_DEV_INIT);
@ -386,6 +390,8 @@ mouse_close(void * cookie)
remove_io_interrupt_handler(INT_PS2_MOUSE, &handle_mouse_interrupt, NULL);
atomic_and(&sOpenMask, 0);
return B_OK;
}
@ -526,6 +532,8 @@ init_driver()
set_sem_owner(sMouseSem, B_SYSTEM_TEAM);
sOpenMask = 0;
return B_OK;
}