Messages in this thread Patch in this message | | | From | Greg Kroah-Hartman <> | Subject | [PATCH 5.10 693/717] dma-buf/dma-resv: Respect num_fences when initializing the shared fence list. | Date | Mon, 28 Dec 2020 13:51:31 +0100 |
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From: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
commit bf8975837dac156c33a4d15d46602700998cb6dd upstream.
We hardcode the maximum number of shared fences to 4, instead of respecting num_fences. Use a minimum of 4, but more if num_fences is higher.
This seems to have been an oversight when first implementing the api.
Fixes: 04a5faa8cbe5 ("reservation: update api and add some helpers") Cc: <stable@vger.kernel.org> # v3.17+ Reported-by: Niranjana Vishwanathapura <niranjana.vishwanathapura@intel.com> Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Reviewed-by: Thomas Hellström <thomas.hellstrom@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20201124115707.406917-1-maarten.lankhorst@linux.intel.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- drivers/dma-buf/dma-resv.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/dma-buf/dma-resv.c +++ b/drivers/dma-buf/dma-resv.c @@ -200,7 +200,7 @@ int dma_resv_reserve_shared(struct dma_r max = max(old->shared_count + num_fences, old->shared_max * 2); } else { - max = 4; + max = max(4ul, roundup_pow_of_two(num_fences)); } new = dma_resv_list_alloc(max);
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