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virtio: treat alloc_dax() -EOPNOTSUPP failure as non-fatal
In preparation for checking whether the architecture has data cache
aliasing within alloc_dax(), modify the error handling of virtio
virtio_fs_setup_dax() to treat alloc_dax() -EOPNOTSUPP failure as
non-fatal.
Link: https://lkml.kernel.org/r/20240215144633.96437-7-mathieu.desnoyers@efficios.com
Co-developed-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Fixes: d92576f116
("dax: does not work correctly with virtual aliasing caches")
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Alasdair Kergon <agk@redhat.com>
Cc: Mike Snitzer <snitzer@kernel.org>
Cc: Mikulas Patocka <mpatocka@redhat.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Vishal Verma <vishal.l.verma@intel.com>
Cc: Dave Jiang <dave.jiang@intel.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Dave Chinner <david@fromorbit.com>
Cc: Heiko Carstens <hca@linux.ibm.com>
Cc: kernel test robot <lkp@intel.com>
Cc: Michael Sclafani <dm-devel@lists.linux.dev>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
parent
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@ -16,6 +16,7 @@
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#include <linux/fs_context.h>
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#include <linux/fs_parser.h>
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#include <linux/highmem.h>
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#include <linux/cleanup.h>
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#include <linux/uio.h>
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#include "fuse_i.h"
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@ -795,8 +796,11 @@ static void virtio_fs_cleanup_dax(void *data)
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put_dax(dax_dev);
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}
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DEFINE_FREE(cleanup_dax, struct dax_dev *, if (!IS_ERR_OR_NULL(_T)) virtio_fs_cleanup_dax(_T))
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static int virtio_fs_setup_dax(struct virtio_device *vdev, struct virtio_fs *fs)
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{
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struct dax_device *dax_dev __free(cleanup_dax) = NULL;
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struct virtio_shm_region cache_reg;
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struct dev_pagemap *pgmap;
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bool have_cache;
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@ -804,6 +808,12 @@ static int virtio_fs_setup_dax(struct virtio_device *vdev, struct virtio_fs *fs)
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if (!IS_ENABLED(CONFIG_FUSE_DAX))
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return 0;
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dax_dev = alloc_dax(fs, &virtio_fs_dax_ops);
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if (IS_ERR(dax_dev)) {
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int rc = PTR_ERR(dax_dev);
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return rc == -EOPNOTSUPP ? 0 : rc;
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}
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/* Get cache region */
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have_cache = virtio_get_shm_region(vdev, &cache_reg,
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(u8)VIRTIO_FS_SHMCAP_ID_CACHE);
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@ -849,10 +859,7 @@ static int virtio_fs_setup_dax(struct virtio_device *vdev, struct virtio_fs *fs)
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dev_dbg(&vdev->dev, "%s: window kaddr 0x%px phys_addr 0x%llx len 0x%llx\n",
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__func__, fs->window_kaddr, cache_reg.addr, cache_reg.len);
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fs->dax_dev = alloc_dax(fs, &virtio_fs_dax_ops);
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if (IS_ERR(fs->dax_dev))
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return PTR_ERR(fs->dax_dev);
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fs->dax_dev = no_free_ptr(dax_dev);
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return devm_add_action_or_reset(&vdev->dev, virtio_fs_cleanup_dax,
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fs->dax_dev);
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}
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