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spi-geni: Synchronize SPI transfer and ISR

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In ISR, set the complete variable at the end of the ISR
so that the transfer function which is waiting for the
complete variable will initiate next transfer only after
the ISR is done.

Change-Id: I38bb1a6f063e1553a13ceeb405fdb74f3ced84b4
Signed-off-by: Akash Asthana <akashast@codeaurora.org>
This commit is contained in:
Dilip Kota 2018-12-06 19:03:17 +05:30 • committed by Gerrit - the friendly Code Review server
commit b5fa8bebe7
1 changed files with 8 additions and 3 deletions
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11
drivers/spi/spi-geni-qcom.c
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@ -156,6 +156,7 @@ struct spi_geni_master {
void *ipc;
bool shared_se;
bool dis_autosuspend;
bool cmd_done;
};
static struct spi_master *get_spi_master(struct device *dev)
@ -1279,7 +1280,7 @@ static irqreturn_t geni_spi_irq(int irq, void *data)
if ((m_irq & M_CMD_DONE_EN) || (m_irq & M_CMD_CANCEL_EN) ||
(m_irq & M_CMD_ABORT_EN)) {
complete(&mas->xfer_done);
mas->cmd_done = true;
/*
* If this happens, then a CMD_DONE came before all the
* buffer bytes were sent out. This is unusual, log this
@ -1319,12 +1320,16 @@ static irqreturn_t geni_spi_irq(int irq, void *data)
if (dma_rx_status & RX_DMA_DONE)
mas->rx_rem_bytes = 0;
if (!mas->tx_rem_bytes && !mas->rx_rem_bytes)
complete(&mas->xfer_done);
mas->cmd_done = true;
if ((m_irq & M_CMD_CANCEL_EN) || (m_irq & M_CMD_ABORT_EN))
complete(&mas->xfer_done);
mas->cmd_done = true;
}
exit_geni_spi_irq:
geni_write_reg(m_irq, mas->base, SE_GENI_M_IRQ_CLEAR);
if (mas->cmd_done) {
mas->cmd_done = false;
complete(&mas->xfer_done);
}
return IRQ_HANDLED;
}