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path: root/drivers/pci/pcie/ptm.c
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Diffstat (limited to 'drivers/pci/pcie/ptm.c')
-rw-r--r--drivers/pci/pcie/ptm.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/pci/pcie/ptm.c b/drivers/pci/pcie/ptm.c
index b4e5f55346..7cfb6c0d5d 100644
--- a/drivers/pci/pcie/ptm.c
+++ b/drivers/pci/pcie/ptm.c
@@ -4,6 +4,7 @@
* Copyright (c) 2016, Intel Corporation.
*/
+#include <linux/bitfield.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/pci.h>
@@ -53,7 +54,7 @@ void pci_ptm_init(struct pci_dev *dev)
pci_add_ext_cap_save_buffer(dev, PCI_EXT_CAP_ID_PTM, sizeof(u32));
pci_read_config_dword(dev, ptm + PCI_PTM_CAP, &cap);
- dev->ptm_granularity = (cap & PCI_PTM_GRANULARITY_MASK) >> 8;
+ dev->ptm_granularity = FIELD_GET(PCI_PTM_GRANULARITY_MASK, cap);
/*
* Per the spec recommendation (PCIe r6.0, sec 7.9.15.3), select the
@@ -146,7 +147,7 @@ static int __pci_enable_ptm(struct pci_dev *dev)
ctrl |= PCI_PTM_CTRL_ENABLE;
ctrl &= ~PCI_PTM_GRANULARITY_MASK;
- ctrl |= dev->ptm_granularity << 8;
+ ctrl |= FIELD_PREP(PCI_PTM_GRANULARITY_MASK, dev->ptm_granularity);
if (dev->ptm_root)
ctrl |= PCI_PTM_CTRL_ROOT;