X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=drivers%2Fchar%2Fesp.c;h=09dc4b01232c018e95733b303a86ee8c2f9ed1ba;hb=43bc926fffd92024b46cafaf7350d669ba9ca884;hp=9f53d2fcc360deefc94f131e68b590373212b812;hpb=cee37fe97739d85991964371c1f3a745c00dd236;p=linux-2.6.git

diff --git a/drivers/char/esp.c b/drivers/char/esp.c
index 9f53d2fcc..09dc4b012 100644
--- a/drivers/char/esp.c
+++ b/drivers/char/esp.c
@@ -150,18 +150,6 @@ static void rs_wait_until_sent(struct tty_struct *, int);
 /* Standard COM flags (except for COM4, because of the 8514 problem) */
 #define STD_COM_FLAGS (ASYNC_BOOT_AUTOCONF | ASYNC_SKIP_TEST)
 
-/*
- * tmp_buf is used as a temporary buffer by serial_write.  We need to
- * lock it in case the memcpy_fromfs blocks while swapping in a page,
- * and some other program tries to do a serial write at the same time.
- * Since the lock will only come under contention when the system is
- * swapping and available memory is low, it makes sense to share one
- * buffer across all the serial ports, since it significantly saves
- * memory if large numbers of serial ports are open.
- */
-static unsigned char *tmp_buf;
-static DECLARE_MUTEX(tmp_buf_sem);
-
 static inline int serial_paranoia_check(struct esp_struct *info,
 					char *name, const char *routine)
 {
@@ -345,26 +333,22 @@ static inline void receive_chars_pio(struct esp_struct *info, int num_bytes)
 
 	for (i = 0; i < num_bytes; i++) {
 		if (!(err_buf->data[i] & status_mask)) {
-			*(tty->flip.char_buf_ptr++) = pio_buf->data[i];
+			int flag = 0;
 
 			if (err_buf->data[i] & 0x04) {
-				*(tty->flip.flag_buf_ptr++) = TTY_BREAK;
-
+				flag = TTY_BREAK;
 				if (info->flags & ASYNC_SAK)
 					do_SAK(tty);
 			}
 			else if (err_buf->data[i] & 0x02)
-				*(tty->flip.flag_buf_ptr++) = TTY_FRAME;
+				flag = TTY_FRAME;
 			else if (err_buf->data[i] & 0x01)
-				*(tty->flip.flag_buf_ptr++) = TTY_PARITY;
-			else
-				*(tty->flip.flag_buf_ptr++) = 0;
-		
-			tty->flip.count++;
+				flag = TTY_PARITY;
+			tty_insert_flip_char(tty, pio_buf->data[i], flag);
 		}
 	}
 
-	schedule_delayed_work(&tty->flip.work, 1);
+	tty_schedule_flip(tty);
 
 	info->stat_flags &= ~ESP_STAT_RX_TIMEOUT;
 	release_pio_buffer(pio_buf);
@@ -397,7 +381,6 @@ static inline void receive_chars_dma_done(struct esp_struct *info,
 	int num_bytes;
 	unsigned long flags;
 	
-	
 	flags=claim_dma_lock();
 	disable_dma(dma);
 	clear_dma_ff(dma);
@@ -408,38 +391,31 @@ static inline void receive_chars_dma_done(struct esp_struct *info,
 	
 	info->icount.rx += num_bytes;
 
-	memcpy(tty->flip.char_buf_ptr, dma_buffer, num_bytes);
-	tty->flip.char_buf_ptr += num_bytes;
-	tty->flip.count += num_bytes;
-	memset(tty->flip.flag_buf_ptr, 0, num_bytes);
-	tty->flip.flag_buf_ptr += num_bytes;
-
 	if (num_bytes > 0) {
-		tty->flip.flag_buf_ptr--;
+		tty_insert_flip_string(tty, dma_buffer, num_bytes - 1);
 
 		status &= (0x1c & info->read_status_mask);
+		
+		/* Is the status significant or do we throw the last byte ? */
+		if (!(status & info->ignore_status_mask)) {
+			int statflag = 0;
 
-		if (status & info->ignore_status_mask) {
-			tty->flip.count--;
-			tty->flip.char_buf_ptr--;
-			tty->flip.flag_buf_ptr--;
-		} else if (status & 0x10) {
-			*tty->flip.flag_buf_ptr = TTY_BREAK;
-			(info->icount.brk)++;
-			if (info->flags & ASYNC_SAK)
-				do_SAK(tty);
-		} else if (status & 0x08) {
-			*tty->flip.flag_buf_ptr = TTY_FRAME;
-			(info->icount.frame)++;
-		}
-		else if (status & 0x04) {
-			*tty->flip.flag_buf_ptr = TTY_PARITY;
-			(info->icount.parity)++;
+			if (status & 0x10) {
+				statflag = TTY_BREAK;
+				(info->icount.brk)++;
+				if (info->flags & ASYNC_SAK)
+					do_SAK(tty);
+			} else if (status & 0x08) {
+				statflag = TTY_FRAME;
+				(info->icount.frame)++;
+			}
+			else if (status & 0x04) {
+				statflag = TTY_PARITY;
+				(info->icount.parity)++;
+			}
+			tty_insert_flip_char(tty, dma_buffer[num_bytes - 1], statflag);
 		}
-
-		tty->flip.flag_buf_ptr++;
-		
-		schedule_delayed_work(&tty->flip.work, 1);
+		tty_schedule_flip(tty);
 	}
 
 	if (dma_bytes != num_bytes) {
@@ -693,8 +669,7 @@ static irqreturn_t rs_interrupt_single(int irq, void *dev_id,
 		num_bytes = serial_in(info, UART_ESI_STAT1) << 8;
 		num_bytes |= serial_in(info, UART_ESI_STAT2);
 
-		if (num_bytes > (TTY_FLIPBUF_SIZE - info->tty->flip.count))
-		  num_bytes = TTY_FLIPBUF_SIZE - info->tty->flip.count;
+		num_bytes = tty_buffer_request_room(info->tty, num_bytes);
 
 		if (num_bytes) {
 			if (dma_bytes ||
@@ -1281,7 +1256,7 @@ static int rs_write(struct tty_struct * tty,
 	if (serial_paranoia_check(info, tty->name, "rs_write"))
 		return 0;
 
-	if (!tty || !info->xmit_buf || !tmp_buf)
+	if (!tty || !info->xmit_buf)
 		return 0;
 	    
 	while (1) {
@@ -2305,11 +2280,7 @@ static int esp_open(struct tty_struct *tty, struct file * filp)
 	tty->driver_data = info;
 	info->tty = tty;
 
-	if (!tmp_buf) {
-		tmp_buf = (unsigned char *) get_zeroed_page(GFP_KERNEL);
-		if (!tmp_buf)
-			return -ENOMEM;
-	}
+	spin_unlock_irqrestore(&info->lock, flags);
 	
 	/*
 	 * Start up serial port
@@ -2506,6 +2477,7 @@ static int __init espserial_init(void)
 	}
 
 	memset((void *)info, 0, sizeof(struct esp_struct));
+	spin_lock_init(&info->lock);
 	/* rx_trigger, tx_trigger are needed by autoconfig */
 	info->config.rx_trigger = rx_trigger;
 	info->config.tx_trigger = tx_trigger;
@@ -2542,7 +2514,6 @@ static int __init espserial_init(void)
 		init_waitqueue_head(&info->close_wait);
 		init_waitqueue_head(&info->delta_msr_wait);
 		init_waitqueue_head(&info->break_wait);
-		spin_lock_init(&info->lock);
 		ports = info;
 		printk(KERN_INFO "ttyP%d at 0x%04x (irq = %d) is an ESP ",
 			info->line, info->port, info->irq);
@@ -2616,9 +2587,6 @@ static void __exit espserial_exit(void)
 		free_pages((unsigned long)dma_buffer,
 			get_order(DMA_BUFFER_SZ));
 
-	if (tmp_buf)
-		free_page((unsigned long)tmp_buf);
-
 	while (free_pio_buf) {
 		pio_buf = free_pio_buf->next;
 		kfree(free_pio_buf);