On Thu, Apr 29, 2021 at 08:45:51AM -0500, Tom Lendacky wrote:
> On 4/29/21 1:28 AM, Christoph Hellwig wrote:
> > If the user already specified a swiotlb size on the command line,
> > swiotlb_adjust_size shoul not overwrite it.
> >
> > Fixes: 2cbc2776efe4 ("swiotlb: remove swiotlb_nr_tbl")
> > Reported-by: Tom Lendacky <[email protected]>
>
> Thanks, Christoph!
>
> Tested-by: Tom Lendacky <[email protected]>
Awesome! I put on the stable/for-linus-5.13 and will send a GIT PULL to
Linus later on this week.
Thank you!
>
> > Signed-off-by: Christoph Hellwig <[email protected]>
> > ---
> > kernel/dma/swiotlb.c | 2 ++
> > 1 file changed, 2 insertions(+)
> >
> > diff --git a/kernel/dma/swiotlb.c b/kernel/dma/swiotlb.c
> > index 8635a57f88e9..8ca7d505d61c 100644
> > --- a/kernel/dma/swiotlb.c
> > +++ b/kernel/dma/swiotlb.c
> > @@ -118,6 +118,8 @@ void __init swiotlb_adjust_size(unsigned long size)
> > * architectures such as those supporting memory encryption to
> > * adjust/expand SWIOTLB size for their use.
> > */
> > + if (default_nslabs != IO_TLB_DEFAULT_SIZE >> IO_TLB_SHIFT)
> > + return;
> > size = ALIGN(size, IO_TLB_SIZE);
> > default_nslabs = ALIGN(size >> IO_TLB_SHIFT, IO_TLB_SEGSIZE);
> > pr_info("SWIOTLB bounce buffer size adjusted to %luMB", size >> 20);
> >
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