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PCI/PME: Use FIELD_GET()

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Use FIELD_GET() to remove dependences on the field position, i.e., the
shift value.  No functional change intended.

Link: https://lore.kernel.org/r/20231010204436.1000644-8-helgaas@kernel.org
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
This commit is contained in:
Bjorn Helgaas 2023-10-10 15:44:33 -05:00
parent e0701bd0e6
commit ec302b118a
2 changed files with 4 additions and 1 deletions
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4
drivers/pci/pcie/pme.c
View File

@ -9,6 +9,7 @@
#define dev_fmt(fmt) "PME: " fmt
#include <linux/bitfield.h>
#include <linux/pci.h>
#include <linux/kernel.h>
#include <linux/errno.h>
@ -235,7 +236,8 @@ static void pcie_pme_work_fn(struct work_struct *work)
pcie_clear_root_pme_status(port);
spin_unlock_irq(&data->lock);
pcie_pme_handle_request(port, rtsta & 0xffff);
pcie_pme_handle_request(port,
FIELD_GET(PCI_EXP_RTSTA_PME_RQ_ID, rtsta));
spin_lock_irq(&data->lock);
continue;

1
include/uapi/linux/pci_regs.h
View File

@ -637,6 +637,7 @@
#define PCI_EXP_RTCAP 0x1e /* Root Capabilities */
#define PCI_EXP_RTCAP_CRSVIS 0x0001 /* CRS Software Visibility capability */
#define PCI_EXP_RTSTA 0x20 /* Root Status */
#define PCI_EXP_RTSTA_PME_RQ_ID 0x0000ffff /* PME Requester ID */
#define PCI_EXP_RTSTA_PME 0x00010000 /* PME status */
#define PCI_EXP_RTSTA_PENDING 0x00020000 /* PME pending */
/*