From: Vinicius Costa Gomes <vinicius.gomes@xxxxxxxxx>
Make pci_enable_ptm() accessible from the drivers.
Exposing this to the driver enables the driver to use the
'ptm_enabled' field of 'pci_dev' to check if PTM is enabled or not.
This reverts commit ac6c26da29c1 ("PCI: Make pci_enable_ptm() private").
In the 5.10 kernel version, even to the latest confirmed version,
the following error will still be reported when I225-V network card
is used.
kernel: [ 1.031581] igc: probe of 0000:01:00.0 failed with error -2
kernel: [ 1.066574] igc: probe of 0000:02:00.0 failed with error -2
kernel: [ 1.096152] igc: probe of 0000:03:00.0 failed with error -2
kernel: [ 1.127251] igc: probe of 0000:04:00.0 failed with error -2
Even though I confirmed that 7c496de538eebd8212dc2a3c9a468386b2640d4
and 47bca7de6a4fb8dcb564c7ca4d885c91ed19e03 have been merged into the
kernel 5.10, the bug is still occurred, and the
"commit 1b5d73fb8624 ("igc: Enable PCIe PTM")" can fixes it.
And this patch is the pre-patch of
1b5d73fb862414106cf270a1a7300ce8ae77de83.
Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@xxxxxxxxx>
Acked-by: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@xxxxxxxxx>
Signed-off-by: Meng Tang <tangmeng@xxxxxxxxxxxxx>
---
drivers/pci/pci.h | 3 ---
include/linux/pci.h | 7 +++++++
2 files changed, 7 insertions(+), 3 deletions(-)
diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h
index a96dc6f53076..4084764bf0b1 100644
--- a/drivers/pci/pci.h
+++ b/drivers/pci/pci.h
@@ -585,11 +585,8 @@ static inline void pcie_ecrc_get_policy(char *str) { }
#ifdef CONFIG_PCIE_PTM
void pci_ptm_init(struct pci_dev *dev);
-int pci_enable_ptm(struct pci_dev *dev, u8 *granularity);
#else
static inline void pci_ptm_init(struct pci_dev *dev) { }
-static inline int pci_enable_ptm(struct pci_dev *dev, u8 *granularity)
-{ return -EINVAL; }
#endif
struct pci_dev_reset_methods {
diff --git a/include/linux/pci.h b/include/linux/pci.h
index bc5a1150f072..692ce678c5f1 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -1599,6 +1599,13 @@ static inline bool pci_aer_available(void) { return false; }
bool pci_ats_disabled(void);
+#ifdef CONFIG_PCIE_PTM
+int pci_enable_ptm(struct pci_dev *dev, u8 *granularity);
+#else
+static inline int pci_enable_ptm(struct pci_dev *dev, u8 *granularity)
+{ return -EINVAL; }
+#endif
+
void pci_cfg_access_lock(struct pci_dev *dev);
bool pci_cfg_access_trylock(struct pci_dev *dev);
void pci_cfg_access_unlock(struct pci_dev *dev);
--
2.20.1
