[KJ] [PATCH] usb/io_edgeport: remove

[Nishanth Aravamudan <nacc@us.ibm.com>]

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On Tue, Feb 01, 2005 at 11:43:08AM -0800, Nishanth Aravamudan wrote:
> On Mon, Jan 31, 2005 at 10:57:49AM -0800, Greg KH wrote:
> > On Tue, Jan 25, 2005 at 04:49:18PM -0800, Nishanth Aravamudan wrote:
> > > Hi,
> > > 
> > > Please consider applying.
> > > 
> > > Description: Use wait_event_timeout() instead of deprecated
> > > interruptible_sleep_on_timeout(). Signals are not checked in the current code,
> > > so interruptible should not be necessary. Patch is compile-tested.
> > > 
> > > Signed-off-by: Nishanth Aravamudan <nacc@us.ibm.com>
> > 
> > Applied, thanks.
> 
> Greg,
> 
> This should fix the behavior of the previous patch (probably not noticed yet).
> The wake_up*() was not matched properly in the first patch (fixed below). Please
> consider reverting the previous patch and applying this one instead.
> 
> Thanks,
> Nish
> 
> interruptible_sleep_on_timeout() in one place. Directly use wait-queues in
> other locations to remove remaining callers of interruptible_sleep_on_timeout().
> Signals are not checked in the current code, so interruptible should not be
> necessary. Thus, the wake_up*() calls were modified to match the wait_event*()
> ones. There were some naming conflicts, which I tried to resolve appropriately.
> The final replacement is within a #if 0 / #endif section of code, but in case
> that code is ever used again, I would prefer it had the correct interface :) 
> Patch is compile-tested.

This and the mdc800 patch that I sent are incremental to fix wake_up*()
callers, as Greg requested on IRC.

Thanks,
Nish

Description:  Directly use wait-queues to remove remaining callers of
interruptible_sleep_on_timeout(). Signals are not checked (except in one case) 
in the current code, so interruptible should not be necessary. Modify the
wake_up*() calls to match the wait-queue usage. There were some naming conflicts,
which I tried to resolve appropriately. The final replacement is within a #if 0 /
#endif section of code, but in case that code is ever used again, I would prefer
it had the correct interface :) Patch is compile-tested.

Signed-off-by: Nishanth Aravamudan <nacc@us.ibm.com>

--- 2.6.11-rc2-kj-v/drivers/usb/serial/io_edgeport.c	2005-02-01 12:58:28.000000000 -0800
+++ 2.6.11-rc2-kj/drivers/usb/serial/io_edgeport.c	2005-02-01 13:12:08.000000000 -0800
@@ -972,7 +972,7 @@ static void edge_bulk_out_cmd_callback (
 
 	/* we have completed the command */
 	edge_port->commandPending = FALSE;
-	wake_up_interruptible(&edge_port->wait_command);
+	wake_up(&edge_port->wait_command);
 }
 
 
@@ -1125,9 +1125,10 @@ static int edge_open (struct usb_serial_
  ************************************************************************/
 static void block_until_chase_response(struct edgeport_port *edge_port)
 {
+	DEFINE_WAIT(wait);
 	__u16 lastCredits;
 	int timeout = 1*HZ;
-	int wait = 10;
+	int loop = 10;
 
 	while (1) {
 		// Save Last credits
@@ -1145,12 +1146,14 @@ static void block_until_chase_response(s
 		}
 
 		// Block the thread for a while
-		interruptible_sleep_on_timeout (&edge_port->wait_chase, timeout);
+		prepare_to_wait(&edge_port->wait_chase, &wait, TASK_UNINTERRUPTIBLE);
+		schedule_timeout(timeout);
+		finish_wait(&edge_port->wait_chase, &wait);
 
 		if (lastCredits == edge_port->txCredits) {
 			// No activity.. count down.
-			wait--;
-			if (wait == 0) {
+			loop--;
+			if (loop == 0) {
 				edge_port->chaseResponsePending = FALSE;
 				dbg("%s - Chase TIMEOUT", __FUNCTION__);
 				return;
@@ -1158,7 +1161,7 @@ static void block_until_chase_response(s
 		} else {
 			// Reset timout value back to 10 seconds
 			dbg("%s - Last %d, Current %d", __FUNCTION__, lastCredits, edge_port->txCredits);
-			wait = 10;
+			loop = 10;
 		}
 	}
 }
@@ -1176,10 +1179,11 @@ static void block_until_chase_response(s
  ************************************************************************/
 static void block_until_tx_empty (struct edgeport_port *edge_port)
 {
+	DEFINE_WAIT(wait);
 	struct TxFifo *fifo = &edge_port->txfifo;
 	__u32 lastCount;
 	int timeout = HZ/10;
-	int wait = 30;
+	int loop = 30;
 
 	while (1) {
 		// Save Last count
@@ -1192,20 +1196,22 @@ static void block_until_tx_empty (struct
 		}
 
 		// Block the thread for a while
-		interruptible_sleep_on_timeout (&edge_port->wait_chase, timeout);
+		prepare_to_wait (&edge_port->wait_chase, &wait, TASK_UNINTERRUPTIBLE);
+		schedule_timeout(timeout);
+		finish_wait(&edge_port->wait_chase, &wait);
 
 		dbg("%s wait", __FUNCTION__);
 
 		if (lastCount == fifo->count) {
 			// No activity.. count down.
-			wait--;
-			if (wait == 0) {
+			loop--;
+			if (loop == 0) {
 				dbg("%s - TIMEOUT", __FUNCTION__);
 				return;
 			}
 		} else {
 			// Reset timout value back to seconds
-			wait = 30;
+			loop = 30;
 		}
 	}
 }
@@ -1833,12 +1839,12 @@ static int get_serial_info(struct edgepo
  *****************************************************************************/
 static int edge_ioctl (struct usb_serial_port *port, struct file *file, unsigned int cmd, unsigned long arg)
 {
+	DEFINE_WAIT(wait);
 	struct edgeport_port *edge_port = usb_get_serial_port_data(port);
 	struct async_icount cnow;
 	struct async_icount cprev;
 	struct serial_icounter_struct icount;
 
-
 	dbg("%s - port %d, cmd = 0x%x", __FUNCTION__, port->number, cmd);
 
 	switch (cmd) {
@@ -1865,7 +1871,9 @@ static int edge_ioctl (struct usb_serial
 			dbg("%s (%d) TIOCMIWAIT", __FUNCTION__,  port->number);
 			cprev = edge_port->icount;
 			while (1) {
-				interruptible_sleep_on(&edge_port->delta_msr_wait);
+				prepare_to_wait(&edge_port->delta_msr_wait, &wait, TASK_INTERRUPTIBLE);
+				schedule();
+				finish_wait(&edge_port->delta_msr_wait, &wait);
 				/* see if a signal did it */
 				if (signal_pending(current))
 					return -ERESTARTSYS;
@@ -2105,7 +2113,7 @@ static void process_rcvd_status (struct 
 				// We could choose to do something else when Byte3 says Timeout on Chase from Edgeport,
 				// like wait longer in block_until_chase_response, but for now we don't. 
 				edge_port->chaseResponsePending = FALSE;
-				wake_up_interruptible (&edge_port->wait_chase);
+				wake_up (&edge_port->wait_chase);
 				return;
 
 			case IOSP_EXT_STATUS_RX_CHECK_RSP:
@@ -2128,7 +2136,7 @@ static void process_rcvd_status (struct 
 		/* we have completed the open */
 		edge_port->openPending = FALSE;
 		edge_port->open = TRUE;
-		wake_up_interruptible(&edge_port->wait_open);
+		wake_up(&edge_port->wait_open);
 		return;
 	}
 
@@ -2497,9 +2505,7 @@ static int write_cmd_usb (struct edgepor
 	// wait for command to finish
 	timeout = COMMAND_TIMEOUT;
 #if 0
-	while (timeout && edge_port->commandPending == TRUE) {
-		timeout = interruptible_sleep_on_timeout (&edge_port->wait_command, timeout);
-	}
+	wait_event (&edge_port->wait_command, (edge_port->commandPending == FALSE));
 
 	if (edge_port->commandPending == TRUE) {
 		/* command timed out */

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