usb: xhci: rename 'irq_pending' to 'iman'

JIRA: https://issues.redhat.com/browse/RHEL-116016

commit bf9cce9
Author: Niklas Neronin <niklas.neronin@linux.intel.com>
Date: Thu, 15 May 2025 16:56:18 +0300

  The Interrupt Register Set contains Interrupt Management register (IMAN).
  The IMAN register contains the following fields:
   - Bit 0:	Interrupt Pending (IP)
   - Bit 1:	Interrupt Enable (IE)
   - Bits 31:2:	RsvdP (Reserved and Preserved)

  Tn the xhci driver, the pointer currently named 'irq_pending' refers to the
  IMAN register. However, the name "irq_pending" only describes one of the
  fields within the IMAN register, rather than the entire register itself.
  To improve clarity and better align with the xHCI specification,
  the pointer is renamed to 'iman'.

  Signed-off-by: Niklas Neronin <niklas.neronin@linux.intel.com>
  Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
  Link: https://lore.kernel.org/r/20250515135621.335595-22-mathias.nyman@linux.intel.com
  Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Signed-off-by: Desnes Nunes <desnesn@redhat.com>

Author: Desnes Nunes

drivers/usb/host/xhci-ring.c

@@ -3082,14 +3082,14 @@ void xhci_update_erst_dequeue(struct xhci_hcd *xhci,
 static void xhci_clear_interrupt_pending(struct xhci_interrupter *ir)
 {
 	if (!ir->ip_autoclear) {
-		u32 irq_pending;
+		u32 iman;
 
-		irq_pending = readl(&ir->ir_set->irq_pending);
-		irq_pending |= IMAN_IP;
-		writel(irq_pending, &ir->ir_set->irq_pending);
+		iman = readl(&ir->ir_set->iman);
+		iman |= IMAN_IP;
+		writel(iman, &ir->ir_set->iman);
 
 		/* Read operation to guarantee the write has been flushed from posted buffers */
-		readl(&ir->ir_set->irq_pending);
+		readl(&ir->ir_set->iman);
 	}
 }
 

drivers/usb/host/xhci.c

@@ -330,12 +330,12 @@ int xhci_enable_interrupter(struct xhci_interrupter *ir)
 	if (!ir || !ir->ir_set)
 		return -EINVAL;
 
-	iman = readl(&ir->ir_set->irq_pending);
+	iman = readl(&ir->ir_set->iman);
 	iman |= IMAN_IE;
-	writel(iman, &ir->ir_set->irq_pending);
+	writel(iman, &ir->ir_set->iman);
 
 	/* Read operation to guarantee the write has been flushed from posted buffers */
-	readl(&ir->ir_set->irq_pending);
+	readl(&ir->ir_set->iman);
 	return 0;
 }
 
@@ -346,11 +346,11 @@ int xhci_disable_interrupter(struct xhci_hcd *xhci, struct xhci_interrupter *ir)
 	if (!ir || !ir->ir_set)
 		return -EINVAL;
 
-	iman = readl(&ir->ir_set->irq_pending);
+	iman = readl(&ir->ir_set->iman);
 	iman &= ~IMAN_IE;
-	writel(iman, &ir->ir_set->irq_pending);
+	writel(iman, &ir->ir_set->iman);
 
-	iman = readl(&ir->ir_set->irq_pending);
+	iman = readl(&ir->ir_set->iman);
 	if (iman & IMAN_IP)
 		xhci_dbg(xhci, "%s: Interrupt pending\n", __func__);
 
@@ -834,7 +834,7 @@ static void xhci_save_registers(struct xhci_hcd *xhci)
 		ir->s3_erst_size = readl(&ir->ir_set->erst_size);
 		ir->s3_erst_base = xhci_read_64(xhci, &ir->ir_set->erst_base);
 		ir->s3_erst_dequeue = xhci_read_64(xhci, &ir->ir_set->erst_dequeue);
-		ir->s3_irq_pending = readl(&ir->ir_set->irq_pending);
+		ir->s3_iman = readl(&ir->ir_set->iman);
 		ir->s3_irq_control = readl(&ir->ir_set->irq_control);
 	}
 }
@@ -858,7 +858,7 @@ static void xhci_restore_registers(struct xhci_hcd *xhci)
 		writel(ir->s3_erst_size, &ir->ir_set->erst_size);
 		xhci_write_64(xhci, ir->s3_erst_base, &ir->ir_set->erst_base);
 		xhci_write_64(xhci, ir->s3_erst_dequeue, &ir->ir_set->erst_dequeue);
-		writel(ir->s3_irq_pending, &ir->ir_set->irq_pending);
+		writel(ir->s3_iman, &ir->ir_set->iman);
 		writel(ir->s3_irq_control, &ir->ir_set->irq_control);
 	}
 }

drivers/usb/host/xhci.h

@@ -211,7 +211,7 @@ struct xhci_op_regs {
 
 /**
  * struct xhci_intr_reg - Interrupt Register Set, v1.2 section 5.5.2.
- * @irq_pending:	IMAN - Interrupt Management Register. Used to enable
+ * @iman:		IMAN - Interrupt Management Register. Used to enable
  *			interrupts and check for pending interrupts.
  * @irq_control:	IMOD - Interrupt Moderation Register. Used to throttle interrupts.
  * @erst_size:		ERSTSZ - Number of segments in the Event Ring Segment Table (ERST).
@@ -226,15 +226,15 @@ struct xhci_op_regs {
  * updates the dequeue pointer.
  */
 struct xhci_intr_reg {
-	__le32	irq_pending;
+	__le32	iman;
 	__le32	irq_control;
 	__le32	erst_size;
 	__le32	rsvd;
 	__le64	erst_base;
 	__le64	erst_dequeue;
 };
 
-/* irq_pending bitmasks */
+/* iman bitmasks */
 /* bit 0 - Interrupt Pending (IP), whether there is an interrupt pending. Write-1-to-clear. */
 #define	IMAN_IP			(1 << 0)
 /* bit 1 - Interrupt Enable (IE), whether the interrupter is capable of generating an interrupt */
@@ -1452,7 +1452,7 @@ struct xhci_interrupter {
 	bool			ip_autoclear;
 	u32			isoc_bei_interval;
 	/* For interrupter registers save and restore over suspend/resume */
-	u32	s3_irq_pending;
+	u32	s3_iman;
 	u32	s3_irq_control;
 	u32	s3_erst_size;
 	u64	s3_erst_base;