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- Handle delays/excessive latency during flash command processing with PIO.
- Signed-off-by: Felix Fietkau <nbd@nbd.name>
- --- a/drivers/mtd/nand/pxa3xx_nand.c
- +++ b/drivers/mtd/nand/pxa3xx_nand.c
- @@ -227,6 +227,7 @@ struct pxa3xx_nand_info {
- int use_dma; /* use DMA ? */
- int use_spare; /* use spare ? */
- int need_wait;
- + int pio_progress;
-
- /* Amount of real data per full chunk */
- unsigned int chunk_size;
- @@ -769,6 +770,7 @@ static irqreturn_t pxa3xx_nand_irq_threa
- {
- struct pxa3xx_nand_info *info = data;
-
- + info->pio_progress = 1;
- handle_data_pio(info);
-
- info->state = STATE_CMD_DONE;
- @@ -1175,8 +1177,13 @@ static void nand_cmdfunc(struct mtd_info
- info->need_wait = 1;
- pxa3xx_nand_start(info);
-
- +retry:
- + info->pio_progress = 0;
- if (!wait_for_completion_timeout(&info->cmd_complete,
- CHIP_DELAY_TIMEOUT)) {
- + if (info->pio_progress)
- + goto retry;
- +
- dev_err(&info->pdev->dev, "Wait time out!!!\n");
- /* Stop State Machine for next command cycle */
- pxa3xx_nand_stop(info);
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