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i2c: qcom-geni: Propagate GENI_ABORT_DONE to geni_i2c_abort_xfer()

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Waiting for M_CMD_ABORT_EN in geni_i2c_abort_xfer() races with the
interrupt handler which will read and clear the abort bit, the result is
that every abort attempt takes 1 second and is followed by a message
about the abort having times out.

Introduce a new state variable to carry the abort_done state from the
interrupt handler back to geni_i2c_abort_xfer(). Also, turn NACK
and TIMEOUT errors into debug messages

Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Reviewed-by: Vinod Koul <vkoul@kernel.org>
[wsa: squashed two patches into one]
Signed-off-by: Wolfram Sang <wsa@kernel.org>
This commit is contained in:
Bjorn Andersson 2022-07-16 20:50:26 -07:00 committed by Wolfram Sang
parent ac720e3e0e
commit 913ee46905
1 changed files with 15 additions and 5 deletions
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20
drivers/i2c/busses/i2c-qcom-geni.c
View file

@ -97,6 +97,7 @@ struct geni_i2c_dev {
struct dma_chan *tx_c;
struct dma_chan *rx_c;
bool gpi_mode;
bool abort_done;
};
struct geni_i2c_err_log {
@ -203,9 +204,18 @@ static void geni_i2c_err(struct geni_i2c_dev *gi2c, int err)
dev_dbg(gi2c->se.dev, "len:%d, slv-addr:0x%x, RD/WR:%d\n",
gi2c->cur->len, gi2c->cur->addr, gi2c->cur->flags);
if (err != NACK && err != GENI_ABORT_DONE) {
switch (err) {
case GENI_ABORT_DONE:
gi2c->abort_done = true;
break;
case NACK:
case GENI_TIMEOUT:
dev_dbg(gi2c->se.dev, "%s\n", gi2c_log[err].msg);
break;
default:
dev_err(gi2c->se.dev, "%s\n", gi2c_log[err].msg);
geni_i2c_err_misc(gi2c);
break;
}
}
@ -311,21 +321,21 @@ static irqreturn_t geni_i2c_irq(int irq, void *dev)
static void geni_i2c_abort_xfer(struct geni_i2c_dev *gi2c)
{
u32 val;
unsigned long time_left = ABORT_TIMEOUT;
unsigned long flags;
spin_lock_irqsave(&gi2c->lock, flags);
geni_i2c_err(gi2c, GENI_TIMEOUT);
gi2c->cur = NULL;
gi2c->abort_done = false;
geni_se_abort_m_cmd(&gi2c->se);
spin_unlock_irqrestore(&gi2c->lock, flags);
do {
time_left = wait_for_completion_timeout(&gi2c->done, time_left);
val = readl_relaxed(gi2c->se.base + SE_GENI_M_IRQ_STATUS);
} while (!(val & M_CMD_ABORT_EN) && time_left);
} while (!gi2c->abort_done && time_left);
if (!(val & M_CMD_ABORT_EN))
if (!time_left)
dev_err(gi2c->se.dev, "Timeout abort_m_cmd\n");
}