Messages in this thread Patch in this message | | | From | Jon Lin <> | Subject | [PATCH] spi: rockchip: Unmask IRQ at the final to avoid preemption | Date | Fri, 17 Jun 2022 20:42:51 +0800 |
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Avoid pio_write process is preempted, resulting in abnormal state.
Signed-off-by: Jon Lin <jon.lin@rock-chips.com> Signed-off-by: Jon <jon.lin@rock-chips.com> ---
drivers/spi/spi-rockchip.c | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-)
diff --git a/drivers/spi/spi-rockchip.c b/drivers/spi/spi-rockchip.c index a08215eb9e14..79242dc5272d 100644 --- a/drivers/spi/spi-rockchip.c +++ b/drivers/spi/spi-rockchip.c @@ -381,15 +381,18 @@ static int rockchip_spi_prepare_irq(struct rockchip_spi *rs, rs->tx_left = rs->tx ? xfer->len / rs->n_bytes : 0; rs->rx_left = xfer->len / rs->n_bytes; - if (rs->cs_inactive) - writel_relaxed(INT_RF_FULL | INT_CS_INACTIVE, rs->regs + ROCKCHIP_SPI_IMR); - else - writel_relaxed(INT_RF_FULL, rs->regs + ROCKCHIP_SPI_IMR); + writel_relaxed(0xffffffff, rs->regs + ROCKCHIP_SPI_ICR); + spi_enable_chip(rs, true); if (rs->tx_left) rockchip_spi_pio_writer(rs); + if (rs->cs_inactive) + writel_relaxed(INT_RF_FULL | INT_CS_INACTIVE, rs->regs + ROCKCHIP_SPI_IMR); + else + writel_relaxed(INT_RF_FULL, rs->regs + ROCKCHIP_SPI_IMR); + /* 1 means the transfer is in progress */ return 1; } -- 2.17.1
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