diff options
| author | Huan Yang <link@vivo.com> | 2025-04-28 15:38:29 +0800 |
|---|---|---|
| committer | Vivek Kasireddy <vivek.kasireddy@intel.com> | 2025-05-15 21:54:51 -0700 |
| commit | ceb7b62eaaaacfcf87473bd2e99ac73a758620cb (patch) | |
| tree | 624fbb3567c57cc028c63158c0386e0027394312 /drivers/dma-buf/Kconfig | |
| parent | 549810e918155cc00d65d44ed3e7d2bd0aa89df9 (diff) | |
Revert "udmabuf: fix vmap_udmabuf error page set"
This reverts commit 18d7de823b7150344d242c3677e65d68c5271b04.
We cannot use vmap_pfn() in vmap_udmabuf() as it would fail the pfn_valid()
check in vmap_pfn_apply(). This is because vmap_pfn() is intended to be
used for mapping non-struct-page memory such as PCIe BARs. Since, udmabuf
mostly works with pages/folios backed by shmem/hugetlbfs/THP, vmap_pfn()
is not the right tool or API to invoke for implementing vmap.
Signed-off-by: Huan Yang <link@vivo.com>
Suggested-by: Vivek Kasireddy <vivek.kasireddy@intel.com>
Reported-by: Bingbu Cao <bingbu.cao@linux.intel.com>
Closes: https://lore.kernel.org/dri-devel/eb7e0137-3508-4287-98c4-816c5fd98e10@vivo.com/T/#mbda4f64a3532b32e061f4e8763bc8e307bea3ca8
Acked-by: Vivek Kasireddy <vivek.kasireddy@intel.com>
Signed-off-by: Vivek Kasireddy <vivek.kasireddy@intel.com>
Link: https://lore.kernel.org/r/20250428073831.19942-2-link@vivo.com
Diffstat (limited to 'drivers/dma-buf/Kconfig')
| -rw-r--r-- | drivers/dma-buf/Kconfig | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/drivers/dma-buf/Kconfig b/drivers/dma-buf/Kconfig index fee04fdb0822..b46eb8a552d7 100644 --- a/drivers/dma-buf/Kconfig +++ b/drivers/dma-buf/Kconfig @@ -36,7 +36,6 @@ config UDMABUF depends on DMA_SHARED_BUFFER depends on MEMFD_CREATE || COMPILE_TEST depends on MMU - select VMAP_PFN help A driver to let userspace turn memfd regions into dma-bufs. Qemu can use this to create host dmabufs for guest framebuffers. |