From 81f13f2116cd93910d958c58052ef7dc22f1e577 Mon Sep 17 00:00:00 2001 From: Chuanhong Guo Date: Thu, 24 Sep 2020 23:27:30 +0800 Subject: [PATCH] spi: spi-mtk-nor: fix op checks in supports_op commit a59b2c7c56bf7 ("spi: spi-mtk-nor: support standard spi properties") tries to inverse the logic of supports_op when adding spi_mem_default_supports_op check, but it didn't get it done properly. There are two regressions introduced by this commit: 1. reading ops supported by program mode is rejected. 2. all ops with special controller routines are incorrectly further checked against program mode. This commits inverses the logic back: 1. check spi_mem_default_supports_op and reject unsupported ops first. 2. return true for ops with special controller routines. 3. check the left ops against controller program mode. Fixes: a59b2c7c56bf7 ("spi: spi-mtk-nor: support standard spi properties") Signed-off-by: Chuanhong Guo Link: https://lore.kernel.org/r/20200924152730.733243-4-gch981213@gmail.com Signed-off-by: Mark Brown --- drivers/spi/spi-mtk-nor.c | 21 +++++++++------------ 1 file changed, 9 insertions(+), 12 deletions(-) diff --git a/drivers/spi/spi-mtk-nor.c b/drivers/spi/spi-mtk-nor.c index 4bbf38e..ea39736 100644 --- a/drivers/spi/spi-mtk-nor.c +++ b/drivers/spi/spi-mtk-nor.c @@ -273,7 +273,8 @@ static int mtk_nor_adjust_op_size(struct spi_mem *mem, struct spi_mem_op *op) static bool mtk_nor_supports_op(struct spi_mem *mem, const struct spi_mem_op *op) { - size_t len; + if (!spi_mem_default_supports_op(mem, op)) + return false; if (op->cmd.buswidth != 1) return false; @@ -281,25 +282,21 @@ static bool mtk_nor_supports_op(struct spi_mem *mem, if ((op->addr.nbytes == 3) || (op->addr.nbytes == 4)) { switch(op->data.dir) { case SPI_MEM_DATA_IN: - if (!mtk_nor_match_read(op)) - return false; + if (mtk_nor_match_read(op)) + return true; break; case SPI_MEM_DATA_OUT: - if ((op->addr.buswidth != 1) || - (op->dummy.nbytes != 0) || - (op->data.buswidth != 1)) - return false; + if ((op->addr.buswidth == 1) && + (op->dummy.nbytes == 0) && + (op->data.buswidth == 1)) + return true; break; default: break; } } - len = op->cmd.nbytes + op->addr.nbytes + op->dummy.nbytes; - if ((len > MTK_NOR_PRG_MAX_SIZE) || - ((op->data.nbytes) && (len == MTK_NOR_PRG_MAX_SIZE))) - return false; - return spi_mem_default_supports_op(mem, op); + return mtk_nor_match_prg(op); } static void mtk_nor_setup_bus(struct mtk_nor *sp, const struct spi_mem_op *op) -- 2.7.4