From: Jason Gunthorpe <jgg@nvidia.com>
To: acpica-devel@lists.linux.dev,
Alyssa Rosenzweig <alyssa@rosenzweig.io>,
Albert Ou <aou@eecs.berkeley.edu>,
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Cc: "André Draszik" <andre.draszik@linaro.org>,
"Lu Baolu" <baolu.lu@linux.intel.com>,
"Christoph Hellwig" <hch@lst.de>,
"Jerry Snitselaar" <jsnitsel@redhat.com>,
"Moritz Fischer" <mdf@kernel.org>,
"Zhenhua Huang" <quic_zhenhuah@quicinc.com>,
"Rafael J. Wysocki" <rafael.j.wysocki@intel.com>,
"Rob Herring" <robh@kernel.org>
Subject: [PATCH v2 04/17] acpi: Do not return struct iommu_ops from acpi_iommu_configure_id()
Date: Wed, 15 Nov 2023 10:05:55 -0400 [thread overview]
Message-ID: <4-v2-36a0088ecaa7+22c6e-iommu_fwspec_jgg@nvidia.com> (raw)
In-Reply-To: <0-v2-36a0088ecaa7+22c6e-iommu_fwspec_jgg@nvidia.com>
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>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
---
drivers/acpi/scan.c | 24 +++++++++++++++---------
1 file changed, 15 insertions(+), 9 deletions(-)
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index 9682291188c49c..d171d193f2a51c 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;
@@ -1574,7 +1573,7 @@ static const struct iommu_ops *acpi_iommu_configure_id(struct device *dev,
*/
ops = acpi_iommu_fwspec_ops(dev);
if (ops)
- return ops;
+ return 0;
err = iort_iommu_configure_id(dev, id_in);
if (err && err != -EPROBE_DEFER)
@@ -1589,12 +1588,14 @@ 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 */
@@ -1623,7 +1624,7 @@ 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);
@@ -1632,10 +1633,15 @@ 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;
--
2.42.0
next prev parent reply other threads:[~2023-11-15 14:06 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-11-15 14:05 [PATCH v2 00/17] Solve iommu probe races around iommu_fwspec Jason Gunthorpe
2023-11-15 14:05 ` [PATCH v2 01/17] iommu: Remove struct iommu_ops *iommu from arch_setup_dma_ops() Jason Gunthorpe
2023-11-15 14:05 ` [PATCH v2 02/17] iommmu/of: Do not return struct iommu_ops from of_iommu_configure() Jason Gunthorpe
2023-11-15 14:05 ` [PATCH v2 03/17] iommu/of: Use -ENODEV consistently in of_iommu_configure() Jason Gunthorpe
2023-11-15 14:42 ` Jerry Snitselaar
2023-11-15 14:05 ` Jason Gunthorpe [this message]
2023-11-15 14:45 ` [PATCH v2 04/17] acpi: Do not return struct iommu_ops from acpi_iommu_configure_id() Jerry Snitselaar
2023-11-15 14:05 ` [PATCH v2 05/17] iommu: Make iommu_fwspec->ids a distinct allocation Jason Gunthorpe
2023-11-15 14:05 ` [PATCH v2 06/17] iommu: Add iommu_fwspec_alloc/dealloc() Jason Gunthorpe
2023-11-19 8:10 ` Hector Martin
2023-11-19 9:19 ` Hector Martin
2023-11-19 14:13 ` Jason Gunthorpe
2023-11-21 6:47 ` Hector Martin
2023-11-21 16:00 ` Jason Gunthorpe
2023-11-23 9:08 ` Hector Martin
2023-11-15 14:05 ` [PATCH v2 07/17] iommu: Add iommu_probe_device_fwspec() Jason Gunthorpe
2023-11-15 14:05 ` [PATCH v2 08/17] iommu/of: Do not use dev->iommu within of_iommu_configure() Jason Gunthorpe
2023-11-15 14:06 ` [PATCH v2 09/17] iommu: Add iommu_fwspec_append_ids() Jason Gunthorpe
2023-11-15 14:06 ` [PATCH v2 10/17] acpi: Do not use dev->iommu within acpi_iommu_configure() Jason Gunthorpe
2023-11-15 14:06 ` [PATCH v2 11/17] iommu: Hold iommu_probe_device_lock while calling ops->of_xlate Jason Gunthorpe
2023-11-15 14:06 ` [PATCH v2 12/17] iommu: Make iommu_ops_from_fwnode() static Jason Gunthorpe
2023-11-15 15:09 ` Jerry Snitselaar
2023-11-16 14:36 ` Moritz Fischer
2023-11-15 14:06 ` [PATCH v2 13/17] iommu: Remove dev_iommu_fwspec_set() Jason Gunthorpe
2023-11-15 14:06 ` [PATCH v2 14/17] iommu: Remove pointless iommu_fwspec_free() Jason Gunthorpe
2023-11-15 14:06 ` [PATCH v2 15/17] iommu: Add ops->of_xlate_fwspec() Jason Gunthorpe
2023-11-15 14:06 ` [PATCH v2 16/17] iommu: Mark dev_iommu_get() with lockdep Jason Gunthorpe
2023-11-15 14:06 ` [PATCH v2 17/17] iommu: Mark dev_iommu_priv_set() with a lockdep Jason Gunthorpe
2023-11-15 14:54 ` [PATCH v2 00/17] Solve iommu probe races around iommu_fwspec Jerry Snitselaar
2023-11-15 15:22 ` Robin Murphy
2023-11-15 15:36 ` Jason Gunthorpe
2023-11-15 20:23 ` Robin Murphy
2023-11-16 4:17 ` Jason Gunthorpe
2023-11-21 16:06 ` Robin Murphy
2023-11-21 17:55 ` Jason Gunthorpe
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