diff options
| author | Jason Gunthorpe <jgg@nvidia.com> | 2023-12-07 21:03:13 +0300 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2023-12-12 12:18:50 +0300 |
| commit | cdbc723f2da11331bc92858da50dc7a7610ed9bd (patch) | |
| tree | 3e4942bfc1f381eec46d64f98b2db687729b5962 /drivers/acpi/scan.c | |
| parent | eda1a94caf6b05482bbf57dc244e7a31a9dba77c (diff) | |
| download | linux-cdbc723f2da11331bc92858da50dc7a7610ed9bd.tar.xz | |
acpi: Do not return struct iommu_ops from acpi_iommu_configure_id()
Nothing needs this pointer. Return a normal error code with the usual
IOMMU semantic that ENODEV means 'there is no IOMMU driver'.
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Jerry Snitselaar <jsnitsel@redhat.com>
Reviewed-by: Lu Baolu <baolu.lu@linux.intel.com>
Reviewed-by: Moritz Fischer <moritzf@google.com>
Tested-by: Hector Martin <marcan@marcan.st>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/6-v2-16e4def25ebb+820-iommu_fwspec_p1_jgg@nvidia.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/acpi/scan.c')
| -rw-r--r-- | drivers/acpi/scan.c | 29 |
1 files changed, 17 insertions, 12 deletions
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c index 444a0b3c72f2..340ba720c721 100644 --- a/drivers/acpi/scan.c +++ b/drivers/acpi/scan.c @@ -1562,8 +1562,7 @@ static inline const struct iommu_ops *acpi_iommu_fwspec_ops(struct device *dev) return fwspec ? fwspec->ops : NULL; } -static const struct iommu_ops *acpi_iommu_configure_id(struct device *dev, - const u32 *id_in) +static int acpi_iommu_configure_id(struct device *dev, const u32 *id_in) { int err; const struct iommu_ops *ops; @@ -1577,7 +1576,7 @@ static const struct iommu_ops *acpi_iommu_configure_id(struct device *dev, ops = acpi_iommu_fwspec_ops(dev); if (ops) { mutex_unlock(&iommu_probe_device_lock); - return ops; + return 0; } err = iort_iommu_configure_id(dev, id_in); @@ -1594,12 +1593,14 @@ static const struct iommu_ops *acpi_iommu_configure_id(struct device *dev, /* Ignore all other errors apart from EPROBE_DEFER */ if (err == -EPROBE_DEFER) { - return ERR_PTR(err); + return err; } else if (err) { dev_dbg(dev, "Adding to IOMMU failed: %d\n", err); - return NULL; + return -ENODEV; } - return acpi_iommu_fwspec_ops(dev); + if (!acpi_iommu_fwspec_ops(dev)) + return -ENODEV; + return 0; } #else /* !CONFIG_IOMMU_API */ @@ -1611,10 +1612,9 @@ int acpi_iommu_fwspec_init(struct device *dev, u32 id, return -ENODEV; } -static const struct iommu_ops *acpi_iommu_configure_id(struct device *dev, - const u32 *id_in) +static int acpi_iommu_configure_id(struct device *dev, const u32 *id_in) { - return NULL; + return -ENODEV; } #endif /* !CONFIG_IOMMU_API */ @@ -1628,7 +1628,7 @@ static const struct iommu_ops *acpi_iommu_configure_id(struct device *dev, int acpi_dma_configure_id(struct device *dev, enum dev_dma_attr attr, const u32 *input_id) { - const struct iommu_ops *iommu; + int ret; if (attr == DEV_DMA_NOT_SUPPORTED) { set_dma_ops(dev, &dma_dummy_ops); @@ -1637,10 +1637,15 @@ int acpi_dma_configure_id(struct device *dev, enum dev_dma_attr attr, acpi_arch_dma_setup(dev); - iommu = acpi_iommu_configure_id(dev, input_id); - if (PTR_ERR(iommu) == -EPROBE_DEFER) + ret = acpi_iommu_configure_id(dev, input_id); + if (ret == -EPROBE_DEFER) return -EPROBE_DEFER; + /* + * Historically this routine doesn't fail driver probing due to errors + * in acpi_iommu_configure_id() + */ + arch_setup_dma_ops(dev, 0, U64_MAX, attr == DEV_DMA_COHERENT); return 0; |