[patch 04/37] PCI/MSI: Use lock from msi_device_data

From: Thomas Gleixner <tglx@linutronix.de>
To: LKML <linux-kernel@vger.kernel.org>
Cc: Bjorn Helgaas <helgaas@kernel.org>, Marc Zygnier <maz@kernel.org>,
	Alex Williamson <alex.williamson@redhat.com>,
	Kevin Tian <kevin.tian@intel.com>,
	Jason Gunthorpe <jgg@nvidia.com>, Megha Dey <megha.dey@intel.com>,
	Ashok Raj <ashok.raj@intel.com>,
	linux-pci@vger.kernel.org,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Santosh Shilimkar <ssantosh@kernel.org>,
	iommu@lists.linux-foundation.org, dmaengine@vger.kernel.org,
	Stuart Yoder <stuyoder@gmail.com>,
	Laurentiu Tudor <laurentiu.tudor@nxp.com>,
	Nishanth Menon <nm@ti.com>, Tero Kristo <kristo@kernel.org>,
	linux-arm-kernel@lists.infradead.org, x86@kernel.org,
	Vinod Koul <vkoul@kernel.org>,
	Mark Rutland <mark.rutland@arm.com>,
	Will Deacon <will@kernel.org>, Sinan Kaya <okaya@kernel.org>
Subject: [patch 04/37] PCI/MSI: Use lock from msi_device_data
Date: Sat, 27 Nov 2021 02:20:13 +0100 (CET)	[thread overview]
Message-ID: <20211126230524.173951799@linutronix.de> (raw)
Message-ID: <20211127012013.rYlv6f03D5AYaBFGbIR5pn5n5vCn_FVmTsSQYMUaDaY@z> (raw)
In-Reply-To: 20211126224100.303046749@linutronix.de

Remove the register lock from struct device and use the one in
struct msi_device_data.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---
 drivers/base/core.c    |    1 -
 drivers/pci/msi/msi.c  |    2 +-
 include/linux/device.h |    2 --
 3 files changed, 1 insertion(+), 4 deletions(-)

--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -2875,7 +2875,6 @@ void device_initialize(struct device *de
 	device_pm_init(dev);
 	set_dev_node(dev, NUMA_NO_NODE);
 #ifdef CONFIG_GENERIC_MSI_IRQ
-	raw_spin_lock_init(&dev->msi_lock);
 	INIT_LIST_HEAD(&dev->msi_list);
 #endif
 	INIT_LIST_HEAD(&dev->links.consumers);
--- a/drivers/pci/msi/msi.c
+++ b/drivers/pci/msi/msi.c
@@ -18,7 +18,7 @@ int pci_msi_ignore_mask;
 
 static noinline void pci_msi_update_mask(struct msi_desc *desc, u32 clear, u32 set)
 {
-	raw_spinlock_t *lock = &desc->dev->msi_lock;
+	raw_spinlock_t *lock = &desc->dev->msi.data->lock;
 	unsigned long flags;
 
 	if (!desc->pci.msi_attrib.can_mask)
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -422,7 +422,6 @@ struct dev_msi_info {
  * @em_pd:	device's energy model performance domain
  * @pins:	For device pin management.
  *		See Documentation/driver-api/pin-control.rst for details.
- * @msi_lock:	Lock to protect MSI mask cache and mask register
  * @msi_list:	Hosts MSI descriptors
  * @numa_node:	NUMA node this device is close to.
  * @dma_ops:    DMA mapping operations for this device.
@@ -520,7 +519,6 @@ struct device {
 #endif
 	struct dev_msi_info	msi;
 #ifdef CONFIG_GENERIC_MSI_IRQ
-	raw_spinlock_t		msi_lock;
 	struct list_head	msi_list;
 #endif
 #ifdef CONFIG_DMA_OPS

