diff options
| author | Takashi Sakamoto <o-takashi@sakamocchi.jp> | 2026-01-10 10:39:08 +0900 |
|---|---|---|
| committer | Takashi Sakamoto <o-takashi@sakamocchi.jp> | 2026-01-12 11:49:37 +0900 |
| commit | ef6bdffbb88d86c8a2906fc8a13ae90eb5a6b64e (patch) | |
| tree | 5934ba0a152286bc00092384f5bb2928a779736c /drivers/firewire/core-cdev.c | |
| parent | c2f60aa1602d8bdf2cd44bbaef2c862a356ce414 (diff) | |
firewire: core: stop using page private to store DMA mapping address
There is a long discussion about the use of private field in page
structure between Linux kernel developers.
This commit stop using page private to store DMA mapping address for
isochronous context, to prepare for mm future change.
Link: https://lore.kernel.org/r/20260110013911.19160-6-o-takashi@sakamocchi.jp
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Diffstat (limited to 'drivers/firewire/core-cdev.c')
| -rw-r--r-- | drivers/firewire/core-cdev.c | 5 |
1 files changed, 1 insertions, 4 deletions
diff --git a/drivers/firewire/core-cdev.c b/drivers/firewire/core-cdev.c index 2b8a878c8aae..bb4d0f938f5b 100644 --- a/drivers/firewire/core-cdev.c +++ b/drivers/firewire/core-cdev.c @@ -67,7 +67,6 @@ struct client { u64 iso_closure; struct fw_iso_buffer buffer; unsigned long vm_start; - bool buffer_is_mapped; struct list_head phy_receiver_link; u64 phy_receiver_closure; @@ -1098,7 +1097,7 @@ static int ioctl_create_iso_context(struct client *client, union ioctl_arg *arg) } // The DMA mapping operation is available if the buffer is already allocated by // mmap(2) system call. If not, it is delegated to the system call. - if (!client->buffer_is_mapped) { + if (client->buffer.pages && !client->buffer.dma_addrs) { ret = fw_iso_buffer_map_dma(&client->buffer, client->device->card, iso_dma_direction(context)); if (ret < 0) { @@ -1106,7 +1105,6 @@ static int ioctl_create_iso_context(struct client *client, union ioctl_arg *arg) return ret; } - client->buffer_is_mapped = true; } client->iso_closure = a->closure; client->iso_context = context; @@ -1837,7 +1835,6 @@ static int fw_device_op_mmap(struct file *file, struct vm_area_struct *vma) iso_dma_direction(client->iso_context)); if (ret < 0) goto fail; - client->buffer_is_mapped = true; } } |