6.8-stable review patch. If anyone has any objections, please let me know. ------------------ From: Matt Coster <matt.coster@xxxxxxxxxx> commit e4236b14fe32a8d92686ec656c870a6bb1d6f50a upstream. When the host page size was more than 4 times larger than the FW page size, this macro evaluated to zero resulting in zero-sized arrays. Use DIV_ROUND_UP() to ensure the correct behavior. Reported-by: 20240228012313.5934-1-yaolu@xxxxxxxxxx Closes: https://lore.kernel.org/dri-devel/20240228012313.5934-1-yaolu@xxxxxxxxxx Link: https://lore.kernel.org/dri-devel/20240228012313.5934-1-yaolu@xxxxxxxxxx Fixes: 927f3e0253c1 ("drm/imagination: Implement MIPS firmware processor and MMU support") Cc: stable@xxxxxxxxxxxxxxx Signed-off-by: Matt Coster <matt.coster@xxxxxxxxxx> Reviewed-by: Frank Binns <frank.binns@xxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/gpu/drm/imagination/pvr_fw_mips.h | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) --- a/drivers/gpu/drm/imagination/pvr_fw_mips.h +++ b/drivers/gpu/drm/imagination/pvr_fw_mips.h @@ -7,13 +7,14 @@ #include "pvr_rogue_mips.h" #include <asm/page.h> +#include <linux/math.h> #include <linux/types.h> /* Forward declaration from pvr_gem.h. */ struct pvr_gem_object; -#define PVR_MIPS_PT_PAGE_COUNT ((ROGUE_MIPSFW_MAX_NUM_PAGETABLE_PAGES * ROGUE_MIPSFW_PAGE_SIZE_4K) \ - >> PAGE_SHIFT) +#define PVR_MIPS_PT_PAGE_COUNT DIV_ROUND_UP(ROGUE_MIPSFW_MAX_NUM_PAGETABLE_PAGES * ROGUE_MIPSFW_PAGE_SIZE_4K, PAGE_SIZE) + /** * struct pvr_fw_mips_data - MIPS-specific data */
