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De Francesco" , Khadija Kamran , Sasha Levin Subject: [PATCH 6.3 148/364] staging: axis-fifo: initialize timeouts in init only Date: Mon, 22 May 2023 20:07:33 +0100 Message-Id: <20230522190416.457650627@linuxfoundation.org> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230522190412.801391872@linuxfoundation.org> References: <20230522190412.801391872@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Khadija Kamran [ Upstream commit 752cbd8f191678e86aa754f795546b7f06b7f171 ] Initialize the module parameters, read_timeout and write_timeout once in init(). Module parameters can only be set once and cannot be modified later, so we don't need to evaluate them again when passing the parameters to wait_event_interruptible_timeout(). Convert datatype of {read,write}_timeout from 'int' to 'long int' because implicit conversion of 'long int' to 'int' in statement '{read,write}_timeout = MAX_SCHEDULE_TIMEOUT' results in an overflow. Change format specifier for {read,write}_timeout from %i to %li. Reviewed-by: Fabio M. De Francesco Suggested-by: Greg Kroah-Hartman Signed-off-by: Khadija Kamran Link: https://lore.kernel.org/r/ZBN3XAsItCiTk7CV@khadija-virtual-machine Signed-off-by: Greg Kroah-Hartman Signed-off-by: Sasha Levin --- drivers/staging/axis-fifo/axis-fifo.c | 28 ++++++++++++++++----------- 1 file changed, 17 insertions(+), 11 deletions(-) diff --git a/drivers/staging/axis-fifo/axis-fifo.c b/drivers/staging/axis-fifo/axis-fifo.c index dfd2b357f484b..0a85ea667a1b5 100644 --- a/drivers/staging/axis-fifo/axis-fifo.c +++ b/drivers/staging/axis-fifo/axis-fifo.c @@ -103,17 +103,17 @@ * globals * ---------------------------- */ -static int read_timeout = 1000; /* ms to wait before read() times out */ -static int write_timeout = 1000; /* ms to wait before write() times out */ +static long read_timeout = 1000; /* ms to wait before read() times out */ +static long write_timeout = 1000; /* ms to wait before write() times out */ /* ---------------------------- * module command-line arguments * ---------------------------- */ -module_param(read_timeout, int, 0444); +module_param(read_timeout, long, 0444); MODULE_PARM_DESC(read_timeout, "ms to wait before blocking read() timing out; set to -1 for no timeout"); -module_param(write_timeout, int, 0444); +module_param(write_timeout, long, 0444); MODULE_PARM_DESC(write_timeout, "ms to wait before blocking write() timing out; set to -1 for no timeout"); /* ---------------------------- @@ -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) { @@ -948,7 +944,17 @@ static struct platform_driver axis_fifo_driver = { static int __init axis_fifo_init(void) { - pr_info("axis-fifo driver loaded with parameters read_timeout = %i, write_timeout = %i\n", + 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; + + pr_info("axis-fifo driver loaded with parameters read_timeout = %li, write_timeout = %li\n", read_timeout, write_timeout); return platform_driver_register(&axis_fifo_driver); } -- 2.39.2