[PATCH 0/2][SRU][K/J/OEM-6.0] Fix iosm: WWAN cannot build the connection (DW5823e)

[Koba Ko]

BugLink: https://bugs.launchpad.net/bugs/1998115

[Impact]
 WWAN(DW5823e) can't build the connection successfully.

[Fix]
 With INTEL_IOMMU disable config or by forcing intel_iommu=off from
 grub some of the features of IOSM driver like browsing, flashing &
 coredump collection is not working.

 When driver calls DMA API - dma_map_single() for tx transfers. It is
 resulting in dma mapping error.

 Set the device DMA addressing capabilities using dma_set_mask() and
 remove the INTEL_IOMMU dependency in kconfig so that driver follows
 the platform config either INTEL_IOMMU enable or disable.

 Because the generic jammy(5.15) doesn't contain NET_DEVLINK and RELAY
 CONFIGs yet on iosm module, the single patch is necessary for Jammy.

[Test Case]
 1. boot up with kernel applied the FIX.
 2. check the status of wwan by "mmcli -m 0"
     Status| unlock retries: sim-pin (3)
           | state: ^[32mconnected^[0m
           | power state: on
           | access tech: lte
           | signal quality: 45% (recent)
      ----------------------------------
      3GPP | imei: ######
           | enabled locks: sim, fixed-dialing
           | operator id: 46692
           | operator name: Chunghwa Telecom
           | registration: home
           | packet service state: attached
           | pco:
           | 0: (complete)

[Where problems could occur]
remove the dependency for intel_iommu, iosm would fit better on other platforms not only Intel.

M Chetan Kumar (1):
  net: wwan: iosm: fix driver not working with INTEL_IOMMU disabled

 drivers/net/wwan/Kconfig              | 2 +-
 drivers/net/wwan/iosm/iosm_ipc_pcie.c | 7 +++++++
 2 files changed, 8 insertions(+), 1 deletion(-)

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2.34.1