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pch_uart : Reduce memcpy
Reduce memcpy for performance improvement. Signed-off-by: Tomoya MORINAGA <tomoya-linux@dsn.okisemi.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
parent
7e46132965
commit
1822076cf3
1 changed files with 5 additions and 8 deletions
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@ -390,7 +390,7 @@ static u8 pch_uart_hal_get_modem(struct eg20t_port *priv)
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return get_msr(priv, priv->membase);
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}
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static int pch_uart_hal_write(struct eg20t_port *priv,
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static void pch_uart_hal_write(struct eg20t_port *priv,
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const unsigned char *buf, int tx_size)
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{
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int i;
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@ -400,7 +400,6 @@ static int pch_uart_hal_write(struct eg20t_port *priv,
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thr = buf[i++];
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iowrite8(thr, priv->membase + PCH_UART_THR);
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}
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return i;
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}
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static int pch_uart_hal_read(struct eg20t_port *priv, unsigned char *buf,
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@ -634,7 +633,7 @@ static void pch_dma_tx_complete(void *arg)
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pch_uart_hal_enable_interrupt(priv, PCH_UART_HAL_TX_INT);
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}
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static int pop_tx(struct eg20t_port *priv, unsigned char *buf, int size)
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static int pop_tx(struct eg20t_port *priv, int size)
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{
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int count = 0;
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struct uart_port *port = &priv->port;
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@ -647,7 +646,7 @@ static int pop_tx(struct eg20t_port *priv, unsigned char *buf, int size)
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int cnt_to_end =
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CIRC_CNT_TO_END(xmit->head, xmit->tail, UART_XMIT_SIZE);
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int sz = min(size - count, cnt_to_end);
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memcpy(&buf[count], &xmit->buf[xmit->tail], sz);
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pch_uart_hal_write(priv, &xmit->buf[xmit->tail], sz);
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xmit->tail = (xmit->tail + sz) & (UART_XMIT_SIZE - 1);
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count += sz;
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} while (!uart_circ_empty(xmit) && count < size);
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@ -723,7 +722,6 @@ static unsigned int handle_tx(struct eg20t_port *priv)
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{
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struct uart_port *port = &priv->port;
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struct circ_buf *xmit = &port->state->xmit;
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int ret;
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int fifo_size;
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int tx_size;
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int size;
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@ -748,10 +746,9 @@ static unsigned int handle_tx(struct eg20t_port *priv)
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if (size < 0)
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size = fifo_size;
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tx_size = pop_tx(priv, xmit->buf, size);
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tx_size = pop_tx(priv, size);
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if (tx_size > 0) {
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ret = pch_uart_hal_write(priv, xmit->buf, tx_size);
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port->icount.tx += ret;
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port->icount.tx += tx_size;
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tx_empty = 0;
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}
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