linux-kernel - [PATCH] staging: axis-fifo: initialize timeouts in probe only

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Date:   Mon, 13 Mar 2023 23:07:10 +0500
From:   Khadija Kamran <kamrankhadijadj@...il.com>
To:     outreachy@...ts.linux.dev
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-staging@...ts.linux.dev, linux-kernel@...r.kernel.org
Subject: [PATCH] staging: axis-fifo: initialize timeouts in probe only

Module parameter, read_timeout, can only be set at the loading time. As
it can only be modified once, initialize read_timeout once in the probe
function.
As a result, only use read_timeout as the last argument in
wait_event_interruptible_timeout() call.

Same goes for write_timeout.

Suggested-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Signed-off-by: Khadija Kamran <kamrankhadijadj@...il.com>
---
 drivers/staging/axis-fifo/axis-fifo.c | 18 ++++++++++++------
 1 file changed, 12 insertions(+), 6 deletions(-)

diff --git a/drivers/staging/axis-fifo/axis-fifo.c b/drivers/staging/axis-fifo/axis-fifo.c
index dfd2b357f484..563caf155713 100644
--- a/drivers/staging/axis-fifo/axis-fifo.c
+++ b/drivers/staging/axis-fifo/axis-fifo.c
@@ -384,9 +384,7 @@ static ssize_t axis_fifo_read(struct file *f, char __user *buf,
 		mutex_lock(&fifo->read_lock);
 		ret = wait_event_interruptible_timeout(fifo->read_queue,
 			ioread32(fifo->base_addr + XLLF_RDFO_OFFSET),
-				 (read_timeout >= 0) ?
-				  msecs_to_jiffies(read_timeout) :
-				  MAX_SCHEDULE_TIMEOUT);
+			read_timeout);
 
 		if (ret <= 0) {
 			if (ret == 0) {
@@ -528,9 +526,7 @@ static ssize_t axis_fifo_write(struct file *f, const char __user *buf,
 		ret = wait_event_interruptible_timeout(fifo->write_queue,
 			ioread32(fifo->base_addr + XLLF_TDFV_OFFSET)
 				 >= words_to_write,
-				 (write_timeout >= 0) ?
-				  msecs_to_jiffies(write_timeout) :
-				  MAX_SCHEDULE_TIMEOUT);
+			write_timeout);
 
 		if (ret <= 0) {
 			if (ret == 0) {
@@ -815,6 +811,16 @@ static int axis_fifo_probe(struct platform_device *pdev)
 	char *device_name;
 	int rc = 0; /* error return value */
 
+	if (read_timeout >= 0)
+		read_timeout = msecs_to_jiffies(read_timeout);
+	else
+		read_timeout = MAX_SCHEDULE_TIMEOUT;
+
+	if (write_timeout >= 0)
+		write_timeout = msecs_to_jiffies(write_timeout);
+	else
+		write_timeout = MAX_SCHEDULE_TIMEOUT;
+
 	/* ----------------------------
 	 *     init wrapper device
 	 * ----------------------------
-- 
2.34.1