net: enetc: add generic helper to initialize SR-IOV resources

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The upcoming ENETC v4 PF driver will support SR-IOV, and its logic for
initializing VF resources is identical to the existing ENETC v1 PF
implementation. To avoid code duplication across PF drivers, factor out
the common SR-IOV initialization logic into the enetc-pf-common driver.

Add enetc_init_sriov_resources() to handle:
- Querying the total number of VFs supported by the device via
  pci_sriov_get_totalvfs()
- Allocating memory for the VF state array (struct enetc_vf_state)

The implementation uses devm_kcalloc() instead of kzalloc() to simplify
memory management. This automatically frees VF state memory when the PF
device is removed, eliminating the need for explicit cleanup in error
and remove paths.

Signed-off-by: Wei Fang <wei.fang@nxp.com>
Link: https://patch.msgid.link/20260522092438.1264020-11-wei.fang@nxp.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

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This commit is contained in:

Wei Fang 2026-05-22 17:24:36 +08:00 • committed by Paolo Abeni

parent 6bdc3144c0

commit 250069ef0d

3 changed files with 26 additions and 16 deletions

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20

drivers/net/ethernet/freescale/enetc/enetc_pf.c

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21

drivers/net/ethernet/freescale/enetc/enetc_pf_common.c

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1

drivers/net/ethernet/freescale/enetc/enetc_pf_common.h

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