From: Biju Das biju.das.jz@bp.renesas.com
stable inclusion from stable-v5.10.110 commit 102d7f6c2eff2e7a3e1f9271a61d0c006dce1291 bugzilla: https://gitee.com/openeuler/kernel/issues/I574AL
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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[ Upstream commit 1a4e53d2fc4f68aa654ad96d13ad042e1a8e8a7d ]
max_seg_size is unsigned int and it can have a value up to 2^32 (for eg:-RZ_DMAC driver sets dma_set_max_seg_size as U32_MAX) When this value is used in min_t() as an integer type, it becomes -1 and the value of sgs becomes 0.
Fix this issue by replacing the 'int' data type with 'unsigned int' in min_t().
Signed-off-by: Biju Das biju.das.jz@bp.renesas.com Reviewed-by: Lad Prabhakar prabhakar.mahadev-lad.rj@bp.renesas.com Reviewed-by: Geert Uytterhoeven geert+renesas@glider.be Link: https://lore.kernel.org/r/20220307184843.9994-1-biju.das.jz@bp.renesas.com Signed-off-by: Mark Brown broonie@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Yu Liao liaoyu15@huawei.com Reviewed-by: Wei Li liwei391@huawei.com Signed-off-by: Zheng Zengkai zhengzengkai@huawei.com --- drivers/spi/spi.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c index 8c261eac2cee..2396565fc91b 100644 --- a/drivers/spi/spi.c +++ b/drivers/spi/spi.c @@ -881,10 +881,10 @@ int spi_map_buf(struct spi_controller *ctlr, struct device *dev, int i, ret;
if (vmalloced_buf || kmap_buf) { - desc_len = min_t(int, max_seg_size, PAGE_SIZE); + desc_len = min_t(unsigned int, max_seg_size, PAGE_SIZE); sgs = DIV_ROUND_UP(len + offset_in_page(buf), desc_len); } else if (virt_addr_valid(buf)) { - desc_len = min_t(int, max_seg_size, ctlr->max_dma_len); + desc_len = min_t(unsigned int, max_seg_size, ctlr->max_dma_len); sgs = DIV_ROUND_UP(len, desc_len); } else { return -EINVAL;