2bf9ea6a31
Signed-off-by: Felix Fietkau <nbd@nbd.name> Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
70 lines
2.0 KiB
Diff
70 lines
2.0 KiB
Diff
Revert "mtd: pxa3xx-nand: handle PIO in threaded interrupt"
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This reverts commit 24542257a3b987025d4b998ec2d15e556c98ad3f
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This upstream change has been causing spurious timeouts on accesses
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to the NAND flash if something else on the system is causing
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significant latency.
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Nothing guarantees that the thread will run in time, so the
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usual timeout is unreliable.
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Signed-off-by: Felix Fietkau <nbd@nbd.name>
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--- a/drivers/mtd/nand/pxa3xx_nand.c
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+++ b/drivers/mtd/nand/pxa3xx_nand.c
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@@ -791,24 +791,11 @@ static void start_data_dma(struct pxa3xx
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__func__, direction, info->dma_cookie, info->sg.length);
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}
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-static irqreturn_t pxa3xx_nand_irq_thread(int irq, void *data)
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-{
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- struct pxa3xx_nand_info *info = data;
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-
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- handle_data_pio(info);
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-
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- info->state = STATE_CMD_DONE;
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- nand_writel(info, NDSR, NDSR_WRDREQ | NDSR_RDDREQ);
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-
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- return IRQ_HANDLED;
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-}
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-
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static irqreturn_t pxa3xx_nand_irq(int irq, void *devid)
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{
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struct pxa3xx_nand_info *info = devid;
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unsigned int status, is_completed = 0, is_ready = 0;
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unsigned int ready, cmd_done;
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- irqreturn_t ret = IRQ_HANDLED;
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if (info->cs == 0) {
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ready = NDSR_FLASH_RDY;
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@@ -850,8 +837,7 @@ static irqreturn_t pxa3xx_nand_irq(int i
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} else {
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info->state = (status & NDSR_RDDREQ) ?
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STATE_PIO_READING : STATE_PIO_WRITING;
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- ret = IRQ_WAKE_THREAD;
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- goto NORMAL_IRQ_EXIT;
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+ handle_data_pio(info);
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}
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}
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if (status & cmd_done) {
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@@ -896,7 +882,7 @@ static irqreturn_t pxa3xx_nand_irq(int i
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if (is_ready)
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complete(&info->dev_ready);
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NORMAL_IRQ_EXIT:
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- return ret;
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+ return IRQ_HANDLED;
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}
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static inline int is_buf_blank(uint8_t *buf, size_t len)
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@@ -1856,9 +1842,7 @@ static int alloc_nand_resource(struct pl
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/* initialize all interrupts to be disabled */
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disable_int(info, NDSR_MASK);
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- ret = request_threaded_irq(irq, pxa3xx_nand_irq,
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- pxa3xx_nand_irq_thread, IRQF_ONESHOT,
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- pdev->name, info);
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+ ret = request_irq(irq, pxa3xx_nand_irq, 0, pdev->name, info);
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if (ret < 0) {
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dev_err(&pdev->dev, "failed to request IRQ\n");
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goto fail_free_buf;
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