diff options
Diffstat (limited to 'drivers/s390/char/sclp_tty.c')
| -rw-r--r-- | drivers/s390/char/sclp_tty.c | 26 |
1 files changed, 19 insertions, 7 deletions
diff --git a/drivers/s390/char/sclp_tty.c b/drivers/s390/char/sclp_tty.c index 971fbb52740b..0a92d08830e7 100644 --- a/drivers/s390/char/sclp_tty.c +++ b/drivers/s390/char/sclp_tty.c @@ -48,7 +48,7 @@ static struct sclp_buffer *sclp_ttybuf; static struct timer_list sclp_tty_timer; static struct tty_port sclp_port; -static unsigned char sclp_tty_chars[SCLP_TTY_BUF_SIZE]; +static u8 sclp_tty_chars[SCLP_TTY_BUF_SIZE]; static unsigned short int sclp_tty_chars_count; struct tty_driver *sclp_tty_driver; @@ -168,7 +168,7 @@ sclp_tty_timeout(struct timer_list *unused) /* * Write a string to the sclp tty. */ -static int sclp_tty_write_string(const unsigned char *str, int count, int may_fail) +static int sclp_tty_write_string(const u8 *str, int count, int may_fail) { unsigned long flags; void *page; @@ -229,8 +229,8 @@ out: * tty device. The characters may come from user space or kernel space. This * routine will return the number of characters actually accepted for writing. */ -static int -sclp_tty_write(struct tty_struct *tty, const unsigned char *buf, int count) +static ssize_t +sclp_tty_write(struct tty_struct *tty, const u8 *buf, size_t count) { if (sclp_tty_chars_count > 0) { sclp_tty_write_string(sclp_tty_chars, sclp_tty_chars_count, 0); @@ -250,7 +250,7 @@ sclp_tty_write(struct tty_struct *tty, const unsigned char *buf, int count) * sclp_write() without final '\n' - will be written. */ static int -sclp_tty_put_char(struct tty_struct *tty, unsigned char ch) +sclp_tty_put_char(struct tty_struct *tty, u8 ch) { sclp_tty_chars[sclp_tty_chars_count++] = ch; if (ch == '\n' || sclp_tty_chars_count >= SCLP_TTY_BUF_SIZE) { @@ -490,6 +490,17 @@ static const struct tty_operations sclp_ops = { .flush_buffer = sclp_tty_flush_buffer, }; +/* Release allocated pages. */ +static void __init __sclp_tty_free_pages(void) +{ + struct list_head *page, *p; + + list_for_each_safe(page, p, &sclp_tty_pages) { + list_del(page); + free_page((unsigned long)page); + } +} + static int __init sclp_tty_init(void) { @@ -499,7 +510,7 @@ sclp_tty_init(void) int rc; /* z/VM multiplexes the line mode output on the 32xx screen */ - if (MACHINE_IS_VM && !CONSOLE_IS_SCLP) + if (machine_is_vm() && !CONSOLE_IS_SCLP) return 0; if (!sclp.has_linemode) return 0; @@ -516,6 +527,7 @@ sclp_tty_init(void) for (i = 0; i < MAX_KMEM_PAGES; i++) { page = (void *) get_zeroed_page(GFP_KERNEL | GFP_DMA); if (page == NULL) { + __sclp_tty_free_pages(); tty_driver_kref_put(driver); return -ENOMEM; } @@ -524,7 +536,7 @@ sclp_tty_init(void) timer_setup(&sclp_tty_timer, sclp_tty_timeout, 0); sclp_ttybuf = NULL; sclp_tty_buffer_count = 0; - if (MACHINE_IS_VM) { + if (machine_is_vm()) { /* case input lines to lowercase */ sclp_tty_tolower = 1; } |