diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2016-05-20 22:20:48 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-05-20 22:20:48 -0700 |
commit | 2f37dd131c5d3a2eac21cd5baf80658b1b02a8ac (patch) | |
tree | e0f191b15865268e694c02f1f02cbc26a168ddf9 /drivers/staging/dgnc/dgnc_tty.c | |
parent | 3aa2fc1667acdd9cca816a2bc9529f494bd61b05 (diff) | |
parent | ffc83a79b44e02995ab5e93af07e26f6c7243c53 (diff) | |
download | linux-2f37dd131c5d3a2eac21cd5baf80658b1b02a8ac.tar.bz2 |
Merge tag 'staging-4.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging
Pull staging and IIO driver updates from Greg KH:
"Here's the big staging and iio driver update for 4.7-rc1.
I think we almost broke even with this release, only adding a few more
lines than we removed, which isn't bad overall given that there's a
bunch of new iio drivers added.
The Lustre developers seem to have woken up from their sleep and have
been doing a great job in cleaning up the code and pruning unused or
old cruft, the filesystem is almost readable :)
Other than that, just a lot of basic coding style cleanups in the
churn. All have been in linux-next for a while with no reported
issues"
* tag 'staging-4.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging: (938 commits)
Staging: emxx_udc: emxx_udc: fixed coding style issue
staging/gdm724x: fix "alignment should match open parenthesis" issues
staging/gdm724x: Fix avoid CamelCase
staging: unisys: rename misleading var ii with frag
staging: unisys: visorhba: switch success handling to error handling
staging: unisys: visorhba: main path needs to flow down the left margin
staging: unisys: visorinput: handle_locking_key() simplifications
staging: unisys: visorhba: fail gracefully for thread creation failures
staging: unisys: visornic: comment restructuring and removing bad diction
staging: unisys: fix format string %Lx to %llx for u64
staging: unisys: remove unused struct members
staging: unisys: visorchannel: correct variable misspelling
staging: unisys: visorhba: replace functionlike macro with function
staging: dgnc: Need to check for NULL of ch
staging: dgnc: remove redundant condition check
staging: dgnc: fix 'line over 80 characters'
staging: dgnc: clean up the dgnc_get_modem_info()
staging: lustre: lnet: enable configuration per NI interface
staging: lustre: o2iblnd: properly set ibr_why
staging: lustre: o2iblnd: remove last of kiblnd_tunables_fini
...
Diffstat (limited to 'drivers/staging/dgnc/dgnc_tty.c')
-rw-r--r-- | drivers/staging/dgnc/dgnc_tty.c | 277 |
1 files changed, 116 insertions, 161 deletions
diff --git a/drivers/staging/dgnc/dgnc_tty.c b/drivers/staging/dgnc/dgnc_tty.c index 5c221593a0c6..4eeecc992a02 100644 --- a/drivers/staging/dgnc/dgnc_tty.c +++ b/drivers/staging/dgnc/dgnc_tty.c @@ -176,57 +176,42 @@ int dgnc_tty_preinit(void) */ int dgnc_tty_register(struct dgnc_board *brd) { - int rc = 0; - - brd->SerialDriver.magic = TTY_DRIVER_MAGIC; + int rc; - snprintf(brd->SerialName, MAXTTYNAMELEN, "tty_dgnc_%d_", brd->boardnum); + brd->serial_driver = tty_alloc_driver(brd->maxports, + TTY_DRIVER_REAL_RAW | + TTY_DRIVER_DYNAMIC_DEV | + TTY_DRIVER_HARDWARE_BREAK); - brd->SerialDriver.name = brd->SerialName; - brd->SerialDriver.name_base = 0; - brd->SerialDriver.major = 0; - brd->SerialDriver.minor_start = 0; - brd->SerialDriver.num = brd->maxports; - brd->SerialDriver.type = TTY_DRIVER_TYPE_SERIAL; - brd->SerialDriver.subtype = SERIAL_TYPE_NORMAL; - brd->SerialDriver.init_termios = DgncDefaultTermios; - brd->SerialDriver.driver_name = DRVSTR; - brd->SerialDriver.flags = (TTY_DRIVER_REAL_RAW | - TTY_DRIVER_DYNAMIC_DEV | - TTY_DRIVER_HARDWARE_BREAK); + if (IS_ERR(brd->serial_driver)) + return PTR_ERR(brd->serial_driver); - /* - * The kernel wants space to store pointers to - * tty_struct's and termios's. - */ - brd->SerialDriver.ttys = kcalloc(brd->maxports, - sizeof(*brd->SerialDriver.ttys), - GFP_KERNEL); - if (!brd->SerialDriver.ttys) - return -ENOMEM; + snprintf(brd->serial_name, MAXTTYNAMELEN, "tty_dgnc_%d_", brd->boardnum); - kref_init(&brd->SerialDriver.kref); - brd->SerialDriver.termios = kcalloc(brd->maxports, - sizeof(*brd->SerialDriver.termios), - GFP_KERNEL); - if (!brd->SerialDriver.termios) - return -ENOMEM; + brd->serial_driver->name = brd->serial_name; + brd->serial_driver->name_base = 0; + brd->serial_driver->major = 0; + brd->serial_driver->minor_start = 0; + brd->serial_driver->type = TTY_DRIVER_TYPE_SERIAL; + brd->serial_driver->subtype = SERIAL_TYPE_NORMAL; + brd->serial_driver->init_termios = DgncDefaultTermios; + brd->serial_driver->driver_name = DRVSTR; /* * Entry points for driver. Called by the kernel from * tty_io.c and n_tty.c. */ - tty_set_operations(&brd->SerialDriver, &dgnc_tty_ops); + tty_set_operations(brd->serial_driver, &dgnc_tty_ops); - if (!brd->dgnc_Major_Serial_Registered) { + if (!brd->dgnc_major_serial_registered) { /* Register tty devices */ - rc = tty_register_driver(&brd->SerialDriver); + rc = tty_register_driver(brd->serial_driver); if (rc < 0) { dev_dbg(&brd->pdev->dev, "Can't register tty device (%d)\n", rc); - return rc; + goto free_serial_driver; } - brd->dgnc_Major_Serial_Registered = true; + brd->dgnc_major_serial_registered = true; } /* @@ -234,60 +219,55 @@ int dgnc_tty_register(struct dgnc_board *brd) * again, separately so we don't get the LD confused about what major * we are when we get into the dgnc_tty_open() routine. */ - brd->PrintDriver.magic = TTY_DRIVER_MAGIC; - snprintf(brd->PrintName, MAXTTYNAMELEN, "pr_dgnc_%d_", brd->boardnum); - - brd->PrintDriver.name = brd->PrintName; - brd->PrintDriver.name_base = 0; - brd->PrintDriver.major = brd->SerialDriver.major; - brd->PrintDriver.minor_start = 0x80; - brd->PrintDriver.num = brd->maxports; - brd->PrintDriver.type = TTY_DRIVER_TYPE_SERIAL; - brd->PrintDriver.subtype = SERIAL_TYPE_NORMAL; - brd->PrintDriver.init_termios = DgncDefaultTermios; - brd->PrintDriver.driver_name = DRVSTR; - brd->PrintDriver.flags = (TTY_DRIVER_REAL_RAW | - TTY_DRIVER_DYNAMIC_DEV | - TTY_DRIVER_HARDWARE_BREAK); + brd->print_driver = tty_alloc_driver(brd->maxports, + TTY_DRIVER_REAL_RAW | + TTY_DRIVER_DYNAMIC_DEV | + TTY_DRIVER_HARDWARE_BREAK); + + if (IS_ERR(brd->print_driver)) { + rc = PTR_ERR(brd->print_driver); + goto unregister_serial_driver; + } - /* - * The kernel wants space to store pointers to - * tty_struct's and termios's. Must be separated from - * the Serial Driver so we don't get confused - */ - brd->PrintDriver.ttys = kcalloc(brd->maxports, - sizeof(*brd->PrintDriver.ttys), - GFP_KERNEL); - if (!brd->PrintDriver.ttys) - return -ENOMEM; - kref_init(&brd->PrintDriver.kref); - brd->PrintDriver.termios = kcalloc(brd->maxports, - sizeof(*brd->PrintDriver.termios), - GFP_KERNEL); - if (!brd->PrintDriver.termios) - return -ENOMEM; + snprintf(brd->print_name, MAXTTYNAMELEN, "pr_dgnc_%d_", brd->boardnum); + + brd->print_driver->name = brd->print_name; + brd->print_driver->name_base = 0; + brd->print_driver->major = brd->serial_driver->major; + brd->print_driver->minor_start = 0x80; + brd->print_driver->type = TTY_DRIVER_TYPE_SERIAL; + brd->print_driver->subtype = SERIAL_TYPE_NORMAL; + brd->print_driver->init_termios = DgncDefaultTermios; + brd->print_driver->driver_name = DRVSTR; /* * Entry points for driver. Called by the kernel from * tty_io.c and n_tty.c. */ - tty_set_operations(&brd->PrintDriver, &dgnc_tty_ops); + tty_set_operations(brd->print_driver, &dgnc_tty_ops); - if (!brd->dgnc_Major_TransparentPrint_Registered) { + if (!brd->dgnc_major_transparent_print_registered) { /* Register Transparent Print devices */ - rc = tty_register_driver(&brd->PrintDriver); + rc = tty_register_driver(brd->print_driver); if (rc < 0) { dev_dbg(&brd->pdev->dev, "Can't register Transparent Print device(%d)\n", rc); - return rc; + goto free_print_driver; } - brd->dgnc_Major_TransparentPrint_Registered = true; + brd->dgnc_major_transparent_print_registered = true; } - dgnc_BoardsByMajor[brd->SerialDriver.major] = brd; - brd->dgnc_Serial_Major = brd->SerialDriver.major; - brd->dgnc_TransparentPrint_Major = brd->PrintDriver.major; + dgnc_BoardsByMajor[brd->serial_driver->major] = brd; + + return 0; + +free_print_driver: + put_tty_driver(brd->print_driver); +unregister_serial_driver: + tty_unregister_driver(brd->serial_driver); +free_serial_driver: + put_tty_driver(brd->serial_driver); return rc; } @@ -364,12 +344,12 @@ int dgnc_tty_init(struct dgnc_board *brd) { struct device *classp; - classp = tty_register_device(&brd->SerialDriver, i, + classp = tty_register_device(brd->serial_driver, i, &ch->ch_bd->pdev->dev); ch->ch_tun.un_sysfs = classp; dgnc_create_tty_sysfs(&ch->ch_tun, classp); - classp = tty_register_device(&brd->PrintDriver, i, + classp = tty_register_device(brd->print_driver, i, &ch->ch_bd->pdev->dev); ch->ch_pun.un_sysfs = classp; dgnc_create_tty_sysfs(&ch->ch_pun, classp); @@ -407,40 +387,32 @@ void dgnc_tty_uninit(struct dgnc_board *brd) { int i = 0; - if (brd->dgnc_Major_Serial_Registered) { - dgnc_BoardsByMajor[brd->SerialDriver.major] = NULL; - brd->dgnc_Serial_Major = 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->SerialDriver, i); + tty_unregister_device(brd->serial_driver, i); } - tty_unregister_driver(&brd->SerialDriver); - brd->dgnc_Major_Serial_Registered = false; + tty_unregister_driver(brd->serial_driver); + brd->dgnc_major_serial_registered = false; } - if (brd->dgnc_Major_TransparentPrint_Registered) { - dgnc_BoardsByMajor[brd->PrintDriver.major] = NULL; - brd->dgnc_TransparentPrint_Major = 0; + 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->PrintDriver, i); + tty_unregister_device(brd->print_driver, i); } - tty_unregister_driver(&brd->PrintDriver); - brd->dgnc_Major_TransparentPrint_Registered = false; + tty_unregister_driver(brd->print_driver); + brd->dgnc_major_transparent_print_registered = false; } - kfree(brd->SerialDriver.ttys); - brd->SerialDriver.ttys = NULL; - kfree(brd->SerialDriver.termios); - brd->SerialDriver.termios = NULL; - kfree(brd->PrintDriver.ttys); - brd->PrintDriver.ttys = NULL; - kfree(brd->PrintDriver.termios); - brd->PrintDriver.termios = NULL; + put_tty_driver(brd->serial_driver); + put_tty_driver(brd->print_driver); } /* @@ -606,6 +578,8 @@ void dgnc_input(struct channel_t *ch) * or the amount of data the card actually has pending... */ while (n) { + unsigned char *ch_pos = ch->ch_equeue + tail; + s = ((head >= tail) ? head : RQUEUESIZE) - tail; s = min(s, n); @@ -620,29 +594,20 @@ void dgnc_input(struct channel_t *ch) */ if (I_PARMRK(tp) || I_BRKINT(tp) || I_INPCK(tp)) { for (i = 0; i < s; i++) { - if (*(ch->ch_equeue + tail + i) & UART_LSR_BI) - tty_insert_flip_char(tp->port, - *(ch->ch_rqueue + tail + i), - TTY_BREAK); - else if (*(ch->ch_equeue + tail + i) & - UART_LSR_PE) - tty_insert_flip_char(tp->port, - *(ch->ch_rqueue + tail + i), - TTY_PARITY); - else if (*(ch->ch_equeue + tail + i) & - UART_LSR_FE) - tty_insert_flip_char(tp->port, - *(ch->ch_rqueue + tail + i), - TTY_FRAME); - else - tty_insert_flip_char(tp->port, - *(ch->ch_rqueue + tail + i), - TTY_NORMAL); + unsigned char ch = *(ch_pos + i); + char flag = TTY_NORMAL; + + if (ch & UART_LSR_BI) + flag = TTY_BREAK; + else if (ch & UART_LSR_PE) + flag = TTY_PARITY; + else if (ch & UART_LSR_FE) + flag = TTY_FRAME; + + tty_insert_flip_char(tp->port, ch, flag); } } else { - tty_insert_flip_string(tp->port, - ch->ch_rqueue + tail, - s); + tty_insert_flip_string(tp->port, ch_pos, s); } tail += s; @@ -1117,6 +1082,14 @@ static int dgnc_tty_open(struct tty_struct *tty, struct file *file) if (!ch->ch_wqueue) ch->ch_wqueue = kzalloc(WQUEUESIZE, GFP_KERNEL); + if (!ch->ch_rqueue || !ch->ch_equeue || !ch->ch_wqueue) { + kfree(ch->ch_rqueue); + kfree(ch->ch_equeue); + kfree(ch->ch_wqueue); + + return -ENOMEM; + } + spin_lock_irqsave(&ch->ch_lock, flags); ch->ch_flags &= ~(CH_OPENING); @@ -1539,19 +1512,8 @@ static int dgnc_tty_chars_in_buffer(struct tty_struct *tty) */ static int dgnc_maxcps_room(struct tty_struct *tty, int bytes_available) { - struct channel_t *ch = NULL; - struct un_t *un = NULL; - - if (!tty) - return bytes_available; - - un = tty->driver_data; - if (!un || un->magic != DGNC_UNIT_MAGIC) - return bytes_available; - - ch = un->un_ch; - if (!ch || ch->magic != DGNC_CHANNEL_MAGIC) - return bytes_available; + struct un_t *un = tty->driver_data; + struct channel_t *ch = un->un_ch; /* * If its not the Transparent print device, return @@ -2058,17 +2020,7 @@ static inline int dgnc_get_mstat(struct channel_t *ch) static int dgnc_get_modem_info(struct channel_t *ch, unsigned int __user *value) { - int result; - - if (!ch || ch->magic != DGNC_CHANNEL_MAGIC) - return -ENXIO; - - result = dgnc_get_mstat(ch); - - if (result < 0) - return -ENXIO; - - return put_user(result, value); + return put_user(dgnc_get_mstat(ch), value); } /* @@ -2529,6 +2481,7 @@ static int dgnc_tty_ioctl(struct tty_struct *tty, unsigned int cmd, unsigned long arg) { struct dgnc_board *bd; + struct board_ops *ch_bd_ops; struct channel_t *ch; struct un_t *un; int rc; @@ -2550,6 +2503,8 @@ static int dgnc_tty_ioctl(struct tty_struct *tty, unsigned int cmd, if (!bd || bd->magic != DGNC_BOARD_MAGIC) return -ENODEV; + ch_bd_ops = bd->bd_ops; + spin_lock_irqsave(&ch->ch_lock, flags); if (un->un_open_count <= 0) { @@ -2574,7 +2529,7 @@ static int dgnc_tty_ioctl(struct tty_struct *tty, unsigned int cmd, if (rc) return rc; - rc = ch->ch_bd->bd_ops->drain(tty, 0); + rc = ch_bd_ops->drain(tty, 0); if (rc) return -EINTR; @@ -2582,7 +2537,7 @@ static int dgnc_tty_ioctl(struct tty_struct *tty, unsigned int cmd, spin_lock_irqsave(&ch->ch_lock, flags); if (((cmd == TCSBRK) && (!arg)) || (cmd == TCSBRKP)) - ch->ch_bd->bd_ops->send_break(ch, 250); + ch_bd_ops->send_break(ch, 250); spin_unlock_irqrestore(&ch->ch_lock, flags); @@ -2599,13 +2554,13 @@ static int dgnc_tty_ioctl(struct tty_struct *tty, unsigned int cmd, if (rc) return rc; - rc = ch->ch_bd->bd_ops->drain(tty, 0); + rc = ch_bd_ops->drain(tty, 0); if (rc) return -EINTR; spin_lock_irqsave(&ch->ch_lock, flags); - ch->ch_bd->bd_ops->send_break(ch, 250); + ch_bd_ops->send_break(ch, 250); spin_unlock_irqrestore(&ch->ch_lock, flags); @@ -2617,13 +2572,13 @@ static int dgnc_tty_ioctl(struct tty_struct *tty, unsigned int cmd, if (rc) return rc; - rc = ch->ch_bd->bd_ops->drain(tty, 0); + rc = ch_bd_ops->drain(tty, 0); if (rc) return -EINTR; spin_lock_irqsave(&ch->ch_lock, flags); - ch->ch_bd->bd_ops->send_break(ch, 250); + ch_bd_ops->send_break(ch, 250); spin_unlock_irqrestore(&ch->ch_lock, flags); @@ -2652,7 +2607,7 @@ static int dgnc_tty_ioctl(struct tty_struct *tty, unsigned int cmd, spin_lock_irqsave(&ch->ch_lock, flags); tty->termios.c_cflag = ((tty->termios.c_cflag & ~CLOCAL) | (arg ? CLOCAL : 0)); - ch->ch_bd->bd_ops->param(tty); + ch_bd_ops->param(tty); spin_unlock_irqrestore(&ch->ch_lock, flags); return 0; @@ -2689,7 +2644,7 @@ static int dgnc_tty_ioctl(struct tty_struct *tty, unsigned int cmd, if ((arg == TCIFLUSH) || (arg == TCIOFLUSH)) { ch->ch_r_head = ch->ch_r_tail; - ch->ch_bd->bd_ops->flush_uart_read(ch); + ch_bd_ops->flush_uart_read(ch); /* Force queue flow control to be released, if needed */ dgnc_check_queue_flow_control(ch); } @@ -2697,9 +2652,9 @@ static int dgnc_tty_ioctl(struct tty_struct *tty, unsigned int cmd, if ((arg == TCOFLUSH) || (arg == TCIOFLUSH)) { if (!(un->un_type == DGNC_PRINT)) { ch->ch_w_head = ch->ch_w_tail; - ch->ch_bd->bd_ops->flush_uart_write(ch); + ch_bd_ops->flush_uart_write(ch); - if (ch->ch_tun.un_flags & (UN_LOW|UN_EMPTY)) { + if (ch->ch_tun.un_flags & (UN_LOW | UN_EMPTY)) { ch->ch_tun.un_flags &= ~(UN_LOW | UN_EMPTY); wake_up_interruptible(&ch->ch_tun.un_flags_wait); @@ -2731,14 +2686,14 @@ static int dgnc_tty_ioctl(struct tty_struct *tty, unsigned int cmd, /* flush rx */ ch->ch_flags &= ~CH_STOP; ch->ch_r_head = ch->ch_r_tail; - ch->ch_bd->bd_ops->flush_uart_read(ch); + ch_bd_ops->flush_uart_read(ch); /* Force queue flow control to be released, if needed */ dgnc_check_queue_flow_control(ch); } /* now wait for all the output to drain */ spin_unlock_irqrestore(&ch->ch_lock, flags); - rc = ch->ch_bd->bd_ops->drain(tty, 0); + rc = ch_bd_ops->drain(tty, 0); if (rc) return -EINTR; @@ -2748,7 +2703,7 @@ static int dgnc_tty_ioctl(struct tty_struct *tty, unsigned int cmd, case TCSETAW: spin_unlock_irqrestore(&ch->ch_lock, flags); - rc = ch->ch_bd->bd_ops->drain(tty, 0); + rc = ch_bd_ops->drain(tty, 0); if (rc) return -EINTR; @@ -2771,7 +2726,7 @@ static int dgnc_tty_ioctl(struct tty_struct *tty, unsigned int cmd, /* set information for ditty */ if (cmd == (DIGI_SETAW)) { spin_unlock_irqrestore(&ch->ch_lock, flags); - rc = ch->ch_bd->bd_ops->drain(tty, 0); + rc = ch_bd_ops->drain(tty, 0); if (rc) return -EINTR; @@ -2804,7 +2759,7 @@ static int dgnc_tty_ioctl(struct tty_struct *tty, unsigned int cmd, else ch->ch_flags &= ~(CH_LOOPBACK); - ch->ch_bd->bd_ops->param(tty); + ch_bd_ops->param(tty); spin_unlock_irqrestore(&ch->ch_lock, flags); return 0; } @@ -2824,7 +2779,7 @@ static int dgnc_tty_ioctl(struct tty_struct *tty, unsigned int cmd, return rc; spin_lock_irqsave(&ch->ch_lock, flags); dgnc_set_custom_speed(ch, new_rate); - ch->ch_bd->bd_ops->param(tty); + ch_bd_ops->param(tty); spin_unlock_irqrestore(&ch->ch_lock, flags); return 0; } @@ -2845,7 +2800,7 @@ static int dgnc_tty_ioctl(struct tty_struct *tty, unsigned int cmd, if (rc) return rc; spin_lock_irqsave(&ch->ch_lock, flags); - ch->ch_bd->bd_ops->send_immediate_char(ch, c); + ch_bd_ops->send_immediate_char(ch, c); spin_unlock_irqrestore(&ch->ch_lock, flags); return 0; } @@ -2933,13 +2888,13 @@ static int dgnc_tty_ioctl(struct tty_struct *tty, unsigned int cmd, /* * Is the UART empty? Add that value to whats in our TX queue. */ - count = buf.txbuf + ch->ch_bd->bd_ops->get_uart_bytes_left(ch); + count = buf.txbuf + ch_bd_ops->get_uart_bytes_left(ch); /* * Figure out how much data the RealPort Server believes should * be in our TX queue. */ - tdist = (buf.tIn - buf.tOut) & 0xffff; + tdist = (buf.tx_in - buf.tx_out) & 0xffff; /* * If we have more data than the RealPort Server believes we |