usb: xhci: fix host not responding after suspend and resume

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

commit ff9a09b
Author: Niklas Neronin <niklas.neronin@linux.intel.com>
Date: Tue, 19 Aug 2025 15:58:44 +0300

  Partially revert commit e1db856 ("usb: xhci: remove '0' write to
  write-1-to-clear register") because the patch cleared the Interrupt Pending
  bit during interrupt enabling and disabling. The Interrupt Pending bit
  should only be cleared when the driver has handled the interrupt.

  Ideally, all interrupts should be handled before disabling the interrupt;
  consequently, no interrupt should be pending when enabling the interrupt.
  For this reason, keep the debug message informing if an interrupt is still
  pending when an interrupt is disabled.

  Because the Interrupt Pending bit is write-1-to-clear, writing '0' to it
  ensures that the state does not change.

  Link: https://lore.kernel.org/linux-usb/20250818231103.672ec7ed@foxbook
  Fixes: e1db856 ("usb: xhci: remove '0' write to write-1-to-clear register")
  Closes: https://bbs.archlinux.org/viewtopic.php?id=307641
  cc: stable@vger.kernel.org # 6.16+
  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/20250819125844.2042452-3-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.c

@@ -331,6 +331,7 @@ int xhci_enable_interrupter(struct xhci_interrupter *ir)
 		return -EINVAL;
 
 	iman = readl(&ir->ir_set->iman);
+	iman &= ~IMAN_IP;
 	iman |= IMAN_IE;
 	writel(iman, &ir->ir_set->iman);
 
@@ -347,6 +348,7 @@ int xhci_disable_interrupter(struct xhci_hcd *xhci, struct xhci_interrupter *ir)
 		return -EINVAL;
 
 	iman = readl(&ir->ir_set->iman);
+	iman &= ~IMAN_IP;
 	iman &= ~IMAN_IE;
 	writel(iman, &ir->ir_set->iman);