> Gesendet: Freitag, 17. Juni 2022 um 19:22 Uhr
> Von: "Robin Murphy"
> An: "Frank Wunderlich" , "Christoph Hellwig"
>
> Cc: linux-ker...@vger.kernel.org, iommu@lists.linux-foundation.org, "Marek
> Szyprowski"
> Betreff: Re: helpi
On 2022-06-17 17:17, Frank Wunderlich wrote:
Am 15. Juni 2022 15:17:00 MESZ schrieb Christoph Hellwig :
On Wed, Jun 15, 2022 at 02:15:33PM +0100, Robin Murphy wrote:
Put simply, if you want to call dma_map_single() on a buffer, then that
buffer needs to be allocated with kmalloc() (or
Am 15. Juni 2022 15:17:00 MESZ schrieb Christoph Hellwig :
>On Wed, Jun 15, 2022 at 02:15:33PM +0100, Robin Murphy wrote:
>> Put simply, if you want to call dma_map_single() on a buffer, then that
>> buffer needs to be allocated with kmalloc() (or technically alloc_pages(),
>> but then
Am 15. Juni 2022 15:17:00 MESZ schrieb Christoph Hellwig :
>On Wed, Jun 15, 2022 at 02:15:33PM +0100, Robin Murphy wrote:
>> Put simply, if you want to call dma_map_single() on a buffer, then that
>> buffer needs to be allocated with kmalloc() (or technically alloc_pages(),
>> but then
On Wed, Jun 15, 2022 at 02:15:33PM +0100, Robin Murphy wrote:
> Put simply, if you want to call dma_map_single() on a buffer, then that
> buffer needs to be allocated with kmalloc() (or technically alloc_pages(),
> but then dma_map_page() would make more sense when dealing with entire
> pages.
On 2022-06-15 13:11, Frank Wunderlich wrote:
Hi,
i have upported a wifi-driver (mt6625l for armhf) for some time and fall now
(at least 5.18) in the
"rejecting DMA map of vmalloc memory" error [1].
maybe anybody here can guide me on how to nail it down and maybe fix it.
as far as i have
Hi,
i have upported a wifi-driver (mt6625l for armhf) for some time and fall now
(at least 5.18) in the
"rejecting DMA map of vmalloc memory" error [1].
maybe anybody here can guide me on how to nail it down and maybe fix it.
as far as i have debugged it, it uses dma_map_single [2] to get dma
