Fix the off-by-one in computing the last page that caused us to try and mmap the page beyond the end of the object.
Signed-off-by: Chris Wilson <[email protected]> --- tests/i915/gem_tiled_wb.c | 4 ++-- tests/i915/gem_tiled_wc.c | 4 ++-- 2 files changed, 4 insertions(+), 4 deletions(-) diff --git a/tests/i915/gem_tiled_wb.c b/tests/i915/gem_tiled_wb.c index 67d54bd30..827c2d9d6 100644 --- a/tests/i915/gem_tiled_wb.c +++ b/tests/i915/gem_tiled_wb.c @@ -174,8 +174,8 @@ igt_simple_main len = size; } - first_page = offset & ~(PAGE_SIZE-1); - last_page = (offset + len + PAGE_SIZE) & ~(PAGE_SIZE-1); + first_page = offset & -PAGE_SIZE; + last_page = (offset + len + PAGE_SIZE - 1) & -PAGE_SIZE; offset -= first_page; linear = gem_mmap__cpu(fd, handle, first_page, last_page - first_page, PROT_READ); diff --git a/tests/i915/gem_tiled_wc.c b/tests/i915/gem_tiled_wc.c index 21390729d..67ebbc940 100644 --- a/tests/i915/gem_tiled_wc.c +++ b/tests/i915/gem_tiled_wc.c @@ -149,8 +149,8 @@ igt_simple_main len = size; } - first_page = offset & ~(PAGE_SIZE-1); - last_page = (offset + len + PAGE_SIZE) & ~(PAGE_SIZE-1); + first_page = offset & -PAGE_SIZE; + last_page = (offset + len + PAGE_SIZE - 1) & -PAGE_SIZE; linear = gem_mmap__wc(fd, handle, first_page, last_page - first_page, PROT_READ); -- 2.20.1 _______________________________________________ Intel-gfx mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/intel-gfx
