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| author | John Ernberg <john.ernberg@actia.se> | 2025-05-02 11:40:55 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-05-18 08:24:54 +0200 |
| commit | 54dd5d6af70570153b21c2281310600327695440 (patch) | |
| tree | e2e5efbc63e63cc7dad65dc04cd98b9ceb72d3d6 /drivers/usb/cdns3/cdnsp-pci.c | |
| parent | 571dcf3d27b24800c171aea7b5e04ff06d10e2e9 (diff) | |
xen: swiotlb: Use swiotlb bouncing if kmalloc allocation demands it
commit cd9c058489053e172a6654cad82ee936d1b09fab upstream.
Xen swiotlb support was missed when the patch set starting with
4ab5f8ec7d71 ("mm/slab: decouple ARCH_KMALLOC_MINALIGN from
ARCH_DMA_MINALIGN") was merged.
When running Xen on iMX8QXP, a SoC without IOMMU, the effect was that USB
transfers ended up corrupted when there was more than one URB inflight at
the same time.
Add a call to dma_kmalloc_needs_bounce() to make sure that allocations too
small for DMA get bounced via swiotlb.
Closes: https://lore.kernel.org/linux-usb/ab2776f0-b838-4cf6-a12a-c208eb6aad59@actia.se/
Fixes: 4ab5f8ec7d71 ("mm/slab: decouple ARCH_KMALLOC_MINALIGN from ARCH_DMA_MINALIGN")
Cc: stable@kernel.org # v6.5+
Signed-off-by: John Ernberg <john.ernberg@actia.se>
Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>
Signed-off-by: Juergen Gross <jgross@suse.com>
Message-ID: <20250502114043.1968976-2-john.ernberg@actia.se>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/cdns3/cdnsp-pci.c')
0 files changed, 0 insertions, 0 deletions