fpga: zynq-fpga: Rename 'timeout' variable as 'time_left'

There is a confusing pattern in the kernel to use a variable named
'timeout' to store the result of wait_for_completion_timeout() causing
patterns like:

        timeout = wait_for_completion_timeout(...)
        if (!timeout) return -ETIMEDOUT;

with all kinds of permutations. Use 'time_left' as a variable to make the
code self explaining.

Signed-off-by: Wolfram Sang <[email protected]>
Acked-by: Michal Simek <[email protected]>
Acked-by: Xu Yilun <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Xu Yilun <[email protected]>

Author: Wolfram Sang

drivers/fpga/zynq-fpga.c

@@ -387,7 +387,7 @@ static int zynq_fpga_ops_write(struct fpga_manager *mgr, struct sg_table *sgt)
 	const char *why;
 	int err;
 	u32 intr_status;
-	unsigned long timeout;
+	unsigned long time_left;
 	unsigned long flags;
 	struct scatterlist *sg;
 	int i;
@@ -427,8 +427,8 @@ static int zynq_fpga_ops_write(struct fpga_manager *mgr, struct sg_table *sgt)
 	zynq_step_dma(priv);
 	spin_unlock_irqrestore(&priv->dma_lock, flags);
 
-	timeout = wait_for_completion_timeout(&priv->dma_done,
-					      msecs_to_jiffies(DMA_TIMEOUT_MS));
+	time_left = wait_for_completion_timeout(&priv->dma_done,
+						msecs_to_jiffies(DMA_TIMEOUT_MS));
 
 	spin_lock_irqsave(&priv->dma_lock, flags);
 	zynq_fpga_set_irq(priv, 0);
@@ -452,7 +452,7 @@ static int zynq_fpga_ops_write(struct fpga_manager *mgr, struct sg_table *sgt)
 
 	if (priv->cur_sg ||
 	    !((intr_status & IXR_D_P_DONE_MASK) == IXR_D_P_DONE_MASK)) {
-		if (timeout == 0)
+		if (time_left == 0)
 			why = "DMA timed out";
 		else
 			why = "DMA did not complete";