iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

spi: rockchip: Unmask IRQ at the final to avoid preemption

Browse Source 
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>
Link: https://lore.kernel.org/r/20220617124251.5051-1-jon.lin@rock-chips.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Jon Lin 2022-06-17 20:42:51 +08:00 committed by Mark Brown
parent 6aa27071e4
commit 419bc8f681
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
1 changed files with 7 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
drivers/spi/spi-rockchip.c
View File

@ -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;
}