diff options
Diffstat (limited to 'drivers/spi')
| -rw-r--r-- | drivers/spi/spi-topcliff-pch.c | 31 |
1 files changed, 24 insertions, 7 deletions
diff --git a/drivers/spi/spi-topcliff-pch.c b/drivers/spi/spi-topcliff-pch.c index 6cb2fdbe5db..c8efa757fda 100644 --- a/drivers/spi/spi-topcliff-pch.c +++ b/drivers/spi/spi-topcliff-pch.c @@ -352,16 +352,26 @@ static irqreturn_t pch_spi_handler(int irq, void *dev_id) "%s returning due to suspend\n", __func__); return IRQ_NONE; } - if (data->use_dma) - return IRQ_NONE; io_remap_addr = data->io_remap_addr; spsr = io_remap_addr + PCH_SPSR; reg_spsr_val = ioread32(spsr); - if (reg_spsr_val & SPSR_ORF_BIT) - dev_err(&board_dat->pdev->dev, "%s Over run error", __func__); + if (reg_spsr_val & SPSR_ORF_BIT) { + dev_err(&board_dat->pdev->dev, "%s Over run error\n", __func__); + if (data->current_msg->complete != 0) { + data->transfer_complete = true; + data->current_msg->status = -EIO; + data->current_msg->complete(data->current_msg->context); + data->bcurrent_msg_processing = false; + data->current_msg = NULL; + data->cur_trans = NULL; + } + } + + if (data->use_dma) + return IRQ_NONE; /* Check if the interrupt is for SPI device */ if (reg_spsr_val & (SPSR_FI_BIT | SPSR_RFI_BIT)) { @@ -815,10 +825,11 @@ static void pch_spi_copy_rx_data_for_dma(struct pch_spi_data *data, int bpw) } } -static void pch_spi_start_transfer(struct pch_spi_data *data) +static int pch_spi_start_transfer(struct pch_spi_data *data) { struct pch_spi_dma_ctrl *dma; unsigned long flags; + int rtn; dma = &data->dma; @@ -833,7 +844,9 @@ static void pch_spi_start_transfer(struct pch_spi_data *data) initiating the transfer. */ dev_dbg(&data->master->dev, "%s:waiting for transfer to get over\n", __func__); - wait_event_interruptible(data->wait, data->transfer_complete); + rtn = wait_event_interruptible_timeout(data->wait, + data->transfer_complete, + msecs_to_jiffies(2 * HZ)); dma_sync_sg_for_cpu(&data->master->dev, dma->sg_rx_p, dma->nent, DMA_FROM_DEVICE); @@ -860,6 +873,8 @@ static void pch_spi_start_transfer(struct pch_spi_data *data) pch_spi_clear_fifo(data->master); spin_unlock_irqrestore(&data->lock, flags); + + return rtn; } static void pch_dma_rx_complete(void *arg) @@ -1187,7 +1202,8 @@ static void pch_spi_process_messages(struct work_struct *pwork) if (data->use_dma) { pch_spi_handle_dma(data, &bpw); - pch_spi_start_transfer(data); + if (!pch_spi_start_transfer(data)) + goto out; pch_spi_copy_rx_data_for_dma(data, bpw); } else { pch_spi_set_tx(data, &bpw); @@ -1225,6 +1241,7 @@ static void pch_spi_process_messages(struct work_struct *pwork) } while (data->cur_trans != NULL); +out: pch_spi_writereg(data->master, PCH_SSNXCR, SSN_HIGH); if (data->use_dma) pch_spi_release_dma(data); |