dma: swiotlb: Track whether the pool size was explicitly set

swiotlb_adjust_size() must not override a pool size supplied through the
swiotlb= command-line parameter.

Currently, it determines whether a size was supplied by comparing
default_nslabs with IO_TLB_DEFAULT_SIZE. This fails when the user
explicitly requests the compiled-in default size, allowing the request
to be overwritten by automatic pool sizing.

Record whether swiotlb= supplied a numeric size in swiotlb_cmdline_size_set
and check that flag directly before adjusting the pool size.

Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Aneesh Kumar K.V (Arm) <aneesh.kumar@kernel.org>
Link: https://lore.kernel.org/r/20260924060756.1325156-4-aneesh.kumar@kernel.org
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>

0 files changed, 0 insertions, 0 deletions