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| author | Samuel Iglesias Gonsalvez <siglesias@igalia.com> | 2012-12-10 11:50:00 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-01-16 03:24:38 +0100 |
| commit | a1da13a67afa45cf996ae9325030dd86c26573fc (patch) | |
| tree | d6dc66f44d8691d5a9332a00d591f3f451add843 /drivers/ipack/devices | |
| parent | ipack/devices/ipoctal: fix kernel bug when using pppd (diff) | |
| download | linux-a1da13a67afa45cf996ae9325030dd86c26573fc.tar.xz linux-a1da13a67afa45cf996ae9325030dd86c26573fc.zip | |
ipack/devices/ipoctal: remove wait_queue and atomic_t board_write
Don't block the TTY client when sending characters.
Signed-off-by: Samuel Iglesias Gonsalvez <siglesias@igalia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/ipack/devices')
| -rw-r--r-- | drivers/ipack/devices/ipoctal.c | 19 |
1 files changed, 3 insertions, 16 deletions
diff --git a/drivers/ipack/devices/ipoctal.c b/drivers/ipack/devices/ipoctal.c index 8d0a86631908..18f9cf1ffe2b 100644 --- a/drivers/ipack/devices/ipoctal.c +++ b/drivers/ipack/devices/ipoctal.c @@ -20,7 +20,6 @@ #include <linux/serial.h> #include <linux/tty_flip.h> #include <linux/slab.h> -#include <linux/atomic.h> #include <linux/io.h> #include <linux/ipack.h> #include "ipoctal.h" @@ -42,7 +41,6 @@ struct ipoctal_channel { union scc2698_channel __iomem *regs; union scc2698_block __iomem *block_regs; unsigned int board_id; - unsigned char *board_write; u8 isr_rx_rdy_mask; u8 isr_tx_rdy_mask; }; @@ -51,7 +49,6 @@ struct ipoctal { struct ipack_device *dev; unsigned int board_id; struct ipoctal_channel channel[NR_CHANNELS]; - unsigned char write; struct tty_driver *tty_drv; u8 __iomem *mem8_space; u8 __iomem *int_space; @@ -181,10 +178,8 @@ static void ipoctal_irq_tx(struct ipoctal_channel *channel) channel->nb_bytes--; if (channel->nb_bytes == 0 && - channel->board_id != IPACK1_DEVICE_ID_SBS_OCTAL_485) { - *channel->board_write = 1; - wake_up_interruptible(&channel->queue); - } + channel->board_id != IPACK1_DEVICE_ID_SBS_OCTAL_485) + iowrite8(CR_DISABLE_TX, &channel->regs->w.cr); } static void ipoctal_irq_channel(struct ipoctal_channel *channel) @@ -207,8 +202,7 @@ static void ipoctal_irq_channel(struct ipoctal_channel *channel) iowrite8(CR_DISABLE_TX, &channel->regs->w.cr); iowrite8(CR_CMD_NEGATE_RTSN, &channel->regs->w.cr); iowrite8(CR_ENABLE_RX, &channel->regs->w.cr); - *channel->board_write = 1; - wake_up_interruptible(&channel->queue); + iowrite8(CR_DISABLE_TX, &channel->regs->w.cr); } /* RX data */ @@ -302,7 +296,6 @@ static int ipoctal_inst_slot(struct ipoctal *ipoctal, unsigned int bus_nr, struct ipoctal_channel *channel = &ipoctal->channel[i]; channel->regs = chan_regs + i; channel->block_regs = block_regs + (i >> 1); - channel->board_write = &ipoctal->write; channel->board_id = ipoctal->board_id; if (i & 1) { channel->isr_tx_rdy_mask = ISR_TxRDY_B; @@ -385,8 +378,6 @@ static int ipoctal_inst_slot(struct ipoctal *ipoctal, unsigned int bus_nr, ipoctal_reset_stats(&channel->stats); channel->nb_bytes = 0; - init_waitqueue_head(&channel->queue); - spin_lock_init(&channel->lock); channel->pointer_read = 0; channel->pointer_write = 0; @@ -450,10 +441,6 @@ static int ipoctal_write_tty(struct tty_struct *tty, * operations */ iowrite8(CR_ENABLE_TX, &channel->regs->w.cr); - wait_event_interruptible(channel->queue, *channel->board_write); - iowrite8(CR_DISABLE_TX, &channel->regs->w.cr); - - *channel->board_write = 0; return char_copied; } |