diff options
| -rw-r--r-- | drivers/spi/spi-tegra210-quad.c | 22 |
1 files changed, 20 insertions, 2 deletions
diff --git a/drivers/spi/spi-tegra210-quad.c b/drivers/spi/spi-tegra210-quad.c index 3be7499db21e..d9ca3d7b082f 100644 --- a/drivers/spi/spi-tegra210-quad.c +++ b/drivers/spi/spi-tegra210-quad.c @@ -1024,8 +1024,10 @@ static void tegra_qspi_handle_error(struct tegra_qspi *tqspi) dev_err(tqspi->dev, "error in transfer, fifo status 0x%08x\n", tqspi->status_reg); tegra_qspi_dump_regs(tqspi); tegra_qspi_flush_fifos(tqspi, true); - if (device_reset(tqspi->dev) < 0) + if (device_reset(tqspi->dev) < 0) { dev_warn_once(tqspi->dev, "device reset failed\n"); + tegra_qspi_mask_clear_irq(tqspi); + } } static void tegra_qspi_transfer_end(struct spi_device *spi) @@ -1176,9 +1178,11 @@ static int tegra_qspi_combined_seq_xfer(struct tegra_qspi *tqspi, } /* Reset controller if timeout happens */ - if (device_reset(tqspi->dev) < 0) + if (device_reset(tqspi->dev) < 0) { dev_warn_once(tqspi->dev, "device reset failed\n"); + tegra_qspi_mask_clear_irq(tqspi); + } ret = -EIO; goto exit; } @@ -1200,11 +1204,13 @@ static int tegra_qspi_combined_seq_xfer(struct tegra_qspi *tqspi, tegra_qspi_transfer_end(spi); spi_transfer_delay_exec(xfer); } + tqspi->curr_xfer = NULL; transfer_phase++; } ret = 0; exit: + tqspi->curr_xfer = NULL; msg->status = ret; return ret; @@ -1290,6 +1296,8 @@ static int tegra_qspi_non_combined_seq_xfer(struct tegra_qspi *tqspi, msg->actual_length += xfer->len + dummy_bytes; complete_xfer: + tqspi->curr_xfer = NULL; + if (ret < 0) { tegra_qspi_transfer_end(spi); spi_transfer_delay_exec(xfer); @@ -1395,6 +1403,7 @@ static irqreturn_t handle_cpu_based_xfer(struct tegra_qspi *tqspi) tegra_qspi_calculate_curr_xfer_param(tqspi, t); tegra_qspi_start_cpu_based_transfer(tqspi, t); exit: + tqspi->curr_xfer = NULL; spin_unlock_irqrestore(&tqspi->lock, flags); return IRQ_HANDLED; } @@ -1480,6 +1489,15 @@ static irqreturn_t tegra_qspi_isr_thread(int irq, void *context_data) { struct tegra_qspi *tqspi = context_data; + /* + * Occasionally the IRQ thread takes a long time to wake up (usually + * when the CPU that it's running on is excessively busy) and we have + * already reached the timeout before and cleaned up the timed out + * transfer. Avoid any processing in that case and bail out early. + */ + if (!tqspi->curr_xfer) + return IRQ_NONE; + tqspi->status_reg = tegra_qspi_readl(tqspi, QSPI_FIFO_STATUS); if (tqspi->cur_direction & DATA_DIR_TX) |