From 9d01b6f064c130028be8beb729ada7c39021b582 Mon Sep 17 00:00:00 2001 From: Samuel Iglesias Gonsalvez Date: Mon, 10 Dec 2012 11:50:02 +0100 Subject: [PATCH] ipack/devices/ipoctal: rework disable TX when the TX buffer is empty Depending of the device, it disables the TX mode in different places when there is no more data to transmit. This patch reorder them and disable the TX mode in the same place. Signed-off-by: Samuel Iglesias Gonsalvez Signed-off-by: Greg Kroah-Hartman --- drivers/ipack/devices/ipoctal.c | 18 +++++++----------- 1 file changed, 7 insertions(+), 11 deletions(-) diff --git a/drivers/ipack/devices/ipoctal.c b/drivers/ipack/devices/ipoctal.c index 850f10506a79..f2875f0f14d4 100644 --- a/drivers/ipack/devices/ipoctal.c +++ b/drivers/ipack/devices/ipoctal.c @@ -177,10 +177,6 @@ static void ipoctal_irq_tx(struct ipoctal_channel *channel) (*pointer_write)++; *pointer_write = *pointer_write % PAGE_SIZE; channel->nb_bytes--; - - if (channel->nb_bytes == 0 && - 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) @@ -196,14 +192,14 @@ static void ipoctal_irq_channel(struct ipoctal_channel *channel) isr = ioread8(&channel->block_regs->r.isr); sr = ioread8(&channel->regs->r.sr); - /* In case of RS-485, change from TX to RX when finishing TX. - * Half-duplex. */ - if ((channel->board_id == IPACK1_DEVICE_ID_SBS_OCTAL_485) && - (sr & SR_TX_EMPTY) && (channel->nb_bytes == 0)) { - 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); + if ((sr & SR_TX_EMPTY) && (channel->nb_bytes == 0)) { iowrite8(CR_DISABLE_TX, &channel->regs->w.cr); + /* In case of RS-485, change from TX to RX when finishing TX. + * Half-duplex. */ + if (channel->board_id == IPACK1_DEVICE_ID_SBS_OCTAL_485) { + iowrite8(CR_CMD_NEGATE_RTSN, &channel->regs->w.cr); + iowrite8(CR_ENABLE_RX, &channel->regs->w.cr); + } } /* RX data */