Revision cbc543c59e8e7c8bc8604d6ac3e18a029e3d5118 authored by Dave Airlie on 20 October 2022, 23:56:07 UTC, committed by Dave Airlie on 20 October 2022, 23:56:14 UTC
drm-misc-fixes for v6.1-rc2: - Fix a buffer overflow in format_helper_test. - Set DDC pointer in drmm_connector_init. - Compiler fixes for panfrost. Signed-off-by: Dave Airlie <airlied@redhat.com> From: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/c4d05683-8ebe-93b8-d24c-d1d2c68f12c4@linux.intel.com
iommu-helper.c
// SPDX-License-Identifier: GPL-2.0
/*
* IOMMU helper functions for the free area management
*/
#include <linux/bitmap.h>
#include <linux/iommu-helper.h>
unsigned long iommu_area_alloc(unsigned long *map, unsigned long size,
unsigned long start, unsigned int nr,
unsigned long shift, unsigned long boundary_size,
unsigned long align_mask)
{
unsigned long index;
/* We don't want the last of the limit */
size -= 1;
again:
index = bitmap_find_next_zero_area(map, size, start, nr, align_mask);
if (index < size) {
if (iommu_is_span_boundary(index, nr, shift, boundary_size)) {
start = ALIGN(shift + index, boundary_size) - shift;
goto again;
}
bitmap_set(map, index, nr);
return index;
}
return -1;
}
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