From 2cca486cad4bf51da57cdad150697476a702ab69 Mon Sep 17 00:00:00 2001 From: William Zhang Date: Fri, 10 Feb 2023 19:27:59 -0800 Subject: [PATCH] spi: bcm63xx-hsspi: bcmbca-hsspi: fix _be16 type usage sparse tool report warnings: drivers/spi/spi-bcm63xx-hsspi.c:197:31: sparse: sparse: cast from restricted __be16. The controller requires big endian 16 bit data. Define an intermediate u16 value and use __be16 piointer dereferncing for the data to avoid directly casting to u16 and sparse warning. Fixes: 85a84a616999 ("spi: bcm63xx-hsspi: Endianness fix for ARM based SoC") Reported-by: kernel test robot Link: https://lore.kernel.org/oe-kbuild-all/202302110438.sQwQnU54-lkp@intel.com/ Signed-off-by: William Zhang Link: https://lore.kernel.org/r/20230211032759.72967-1-william.zhang@broadcom.com Signed-off-by: Mark Brown --- drivers/spi/spi-bcm63xx-hsspi.c | 10 ++++++---- drivers/spi/spi-bcmbca-hsspi.c | 6 ++++-- 2 files changed, 10 insertions(+), 6 deletions(-) diff --git a/drivers/spi/spi-bcm63xx-hsspi.c b/drivers/spi/spi-bcm63xx-hsspi.c index 1e9e906d297c..68093c045e0b 100644 --- a/drivers/spi/spi-bcm63xx-hsspi.c +++ b/drivers/spi/spi-bcm63xx-hsspi.c @@ -350,7 +350,7 @@ static int bcm63xx_hsspi_do_prepend_txrx(struct spi_device *spi, { struct bcm63xx_hsspi *bs = spi_master_get_devdata(spi->master); unsigned int chip_select = spi->chip_select; - u16 opcode = 0; + u16 opcode = 0, val; const u8 *tx = t->tx_buf; u8 *rx = t->rx_buf; u32 reg = 0; @@ -401,7 +401,8 @@ static int bcm63xx_hsspi_do_prepend_txrx(struct spi_device *spi, memcpy_toio(bs->fifo + HSSPI_OPCODE_LEN + bs->prepend_cnt, tx, t->len); - __raw_writew((u16)cpu_to_be16(opcode | t->len), bs->fifo); + *(__be16 *)(&val) = cpu_to_be16(opcode | t->len); + __raw_writew(val, bs->fifo); /* enable interrupt */ if (bs->wait_mode == HSSPI_WAIT_MODE_INTR) __raw_writel(HSSPI_PINGx_CMD_DONE(0), bs->regs + HSSPI_INT_MASK_REG); @@ -468,7 +469,7 @@ static int bcm63xx_hsspi_do_txrx(struct spi_device *spi, struct spi_transfer *t) { struct bcm63xx_hsspi *bs = spi_master_get_devdata(spi->master); unsigned int chip_select = spi->chip_select; - u16 opcode = 0; + u16 opcode = 0, val; int pending = t->len; int step_size = HSSPI_BUFFER_LEN; const u8 *tx = t->tx_buf; @@ -511,7 +512,8 @@ static int bcm63xx_hsspi_do_txrx(struct spi_device *spi, struct spi_transfer *t) tx += curr_step; } - __raw_writew((u16)cpu_to_be16(opcode | curr_step), bs->fifo); + *(__be16 *)(&val) = cpu_to_be16(opcode | curr_step); + __raw_writew(val, bs->fifo); /* enable interrupt */ if (bs->wait_mode == HSSPI_WAIT_MODE_INTR) diff --git a/drivers/spi/spi-bcmbca-hsspi.c b/drivers/spi/spi-bcmbca-hsspi.c index d58033251c02..e255241319ab 100644 --- a/drivers/spi/spi-bcmbca-hsspi.c +++ b/drivers/spi/spi-bcmbca-hsspi.c @@ -252,7 +252,7 @@ static int bcmbca_hsspi_do_txrx(struct spi_device *spi, struct spi_transfer *t, { struct bcmbca_hsspi *bs = spi_master_get_devdata(spi->master); unsigned int chip_select = spi->chip_select; - u16 opcode = 0; + u16 opcode = 0, val; int pending = t->len; int step_size = HSSPI_BUFFER_LEN; const u8 *tx = t->tx_buf; @@ -292,7 +292,9 @@ static int bcmbca_hsspi_do_txrx(struct spi_device *spi, struct spi_transfer *t, memcpy_toio(bs->fifo + HSSPI_OPCODE_LEN, tx, curr_step); tx += curr_step; } - __raw_writew((u16)cpu_to_be16(opcode | curr_step), bs->fifo); + + *(__be16 *)(&val) = cpu_to_be16(opcode | curr_step); + __raw_writew(val, bs->fifo); /* enable interrupt */ if (bs->wait_mode == HSSPI_WAIT_MODE_INTR) -- 2.20.1