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spi: spi-qcom-qspi: Ignore disabled interrupts' status in isr 

During FIFO/DMA modes dynamic switching, only corresponding interrupts are
enabled. However its possible that FIFO related interrupt status registers
get set during DMA mode. For example WR_FIFO_EMPTY bit is set during DMA
TX.

Ignore such status bits so that they don't trip unwanted operations.

Suggested-by: Douglas Anderson <dianders@chromium.org>
Signed-off-by: Vijaya Krishna Nivarthi <quic_vnivarth@quicinc.com>
Fixes: b5762d9560 ("spi: spi-qcom-qspi: Add DMA mode support")
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Tested-by: Douglas Anderson <dianders@chromium.org>
Link: https://lore.kernel.org/r/1690285689-30233-2-git-send-email-quic_vnivarth@quicinc.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Vijaya Krishna Nivarthi 2023-07-25 17:18:06 +05:30 committed by Mark Brown
parent 6eaae19807
commit 17aaf9ea07
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1 changed files with 3 additions and 0 deletions
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3
drivers/spi/spi-qcom-qspi.c
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@ -603,6 +603,9 @@ static irqreturn_t qcom_qspi_irq(int irq, void *dev_id)
int_status = readl(ctrl->base + MSTR_INT_STATUS);
writel(int_status, ctrl->base + MSTR_INT_STATUS);
/* Ignore disabled interrupts */
int_status &= readl(ctrl->base + MSTR_INT_EN);
/* PIO mode handling */
if (ctrl->xfer.dir == QSPI_WRITE) {
if (int_status & WR_FIFO_EMPTY)