diff options
| author | наб <nabijaczleweli@nabijaczleweli.xyz> | 2022-09-16 03:55:09 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-09-22 16:12:34 +0200 |
| commit | 14f9ed6153705016f584e0f6644a2386739dd1e3 (patch) | |
| tree | 3a897d10a37f302f9890a5c81a6f88cea02ff58c /drivers/tty/n_hdlc.c | |
| parent | tty: remove TTY_DRIVER_MAGIC (diff) | |
| download | linux-14f9ed6153705016f584e0f6644a2386739dd1e3.tar.xz linux-14f9ed6153705016f584e0f6644a2386739dd1e3.zip | |
tty: n_hdlc: remove HDLC_MAGIC
According to Greg, in the context of magic numbers as defined in
magic-number.rst, "the tty layer should not need this and I'll gladly
take patches"
Acked-by: Jiri Slaby <jirislaby@kernel.org>
Signed-off-by: Ahelenia Ziemiańska <nabijaczleweli@nabijaczleweli.xyz>
Ref: https://lore.kernel.org/linux-doc/YyMlovoskUcHLEb7@kroah.com/
Link: https://lore.kernel.org/r/c31d228302da3f426cebf6fcff855181a5590a66.1663288066.git.nabijaczleweli@nabijaczleweli.xyz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/n_hdlc.c')
| -rw-r--r-- | drivers/tty/n_hdlc.c | 27 |
1 files changed, 0 insertions, 27 deletions
diff --git a/drivers/tty/n_hdlc.c b/drivers/tty/n_hdlc.c index 5540d9be65ea..46b09bfb6f3a 100644 --- a/drivers/tty/n_hdlc.c +++ b/drivers/tty/n_hdlc.c @@ -76,8 +76,6 @@ * OF THE POSSIBILITY OF SUCH DAMAGE. */ -#define HDLC_MAGIC 0x239e - #include <linux/module.h> #include <linux/init.h> #include <linux/kernel.h> @@ -123,7 +121,6 @@ struct n_hdlc_buf_list { /** * struct n_hdlc - per device instance data structure - * @magic: magic value for structure * @tbusy: reentrancy flag for tx wakeup code * @woke_up: tx wakeup needs to be run again as it was called while @tbusy * @tx_buf_list: list of pending transmit frame buffers @@ -132,7 +129,6 @@ struct n_hdlc_buf_list { * @rx_free_buf_list: list unused received frame buffers */ struct n_hdlc { - int magic; bool tbusy; bool woke_up; struct n_hdlc_buf_list tx_buf_list; @@ -199,10 +195,6 @@ static void n_hdlc_tty_close(struct tty_struct *tty) { struct n_hdlc *n_hdlc = tty->disc_data; - if (n_hdlc->magic != HDLC_MAGIC) { - pr_warn("n_hdlc: trying to close unopened tty!\n"); - return; - } #if defined(TTY_NO_WRITE_SPLIT) clear_bit(TTY_NO_WRITE_SPLIT, &tty->flags); #endif @@ -385,12 +377,6 @@ static void n_hdlc_tty_receive(struct tty_struct *tty, const __u8 *data, pr_debug("%s() called count=%d\n", __func__, count); - /* verify line is using HDLC discipline */ - if (n_hdlc->magic != HDLC_MAGIC) { - pr_err("line not using HDLC discipline\n"); - return; - } - if (count > maxframe) { pr_debug("rx count>maxframesize, data discarded\n"); return; @@ -541,9 +527,6 @@ static ssize_t n_hdlc_tty_write(struct tty_struct *tty, struct file *file, pr_debug("%s() called count=%zd\n", __func__, count); - if (n_hdlc->magic != HDLC_MAGIC) - return -EIO; - /* verify frame size */ if (count > maxframe) { pr_debug("%s: truncating user packet from %zu to %d\n", @@ -608,10 +591,6 @@ static int n_hdlc_tty_ioctl(struct tty_struct *tty, unsigned int cmd, pr_debug("%s() called %d\n", __func__, cmd); - /* Verify the status of the device */ - if (n_hdlc->magic != HDLC_MAGIC) - return -EBADF; - switch (cmd) { case FIONREAD: /* report count of read data available */ @@ -672,9 +651,6 @@ static __poll_t n_hdlc_tty_poll(struct tty_struct *tty, struct file *filp, struct n_hdlc *n_hdlc = tty->disc_data; __poll_t mask = 0; - if (n_hdlc->magic != HDLC_MAGIC) - return 0; - /* * queue the current process into any wait queue that may awaken in the * future (read and write) @@ -738,9 +714,6 @@ static struct n_hdlc *n_hdlc_alloc(void) n_hdlc_alloc_buf(&n_hdlc->rx_free_buf_list, DEFAULT_RX_BUF_COUNT, "rx"); n_hdlc_alloc_buf(&n_hdlc->tx_free_buf_list, DEFAULT_TX_BUF_COUNT, "tx"); - /* Initialize the control block */ - n_hdlc->magic = HDLC_MAGIC; - return n_hdlc; } /* end of n_hdlc_alloc() */ |