mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-29 18:19:02 +00:00
70 lines
2.0 KiB
Diff
70 lines
2.0 KiB
Diff
|
Revert "mtd: pxa3xx-nand: handle PIO in threaded interrupt"
|
||
|
|
|
||
|
|
This reverts commit 24542257a3b987025d4b998ec2d15e556c98ad3f
|
||
|
|
This upstream change has been causing spurious timeouts on accesses
|
||
|
|
to the NAND flash if something else on the system is causing
|
||
|
|
significant latency.
|
||
|
|
|
||
|
|
Nothing guarantees that the thread will run in time, so the
|
||
|
|
usual timeout is unreliable.
|
||
|
|
|
||
|
|
Signed-off-by: Felix Fietkau <nbd@nbd.name>
|
||
|
|
|
||
|
|
--- a/drivers/mtd/nand/pxa3xx_nand.c
|
||
|
|
+++ b/drivers/mtd/nand/pxa3xx_nand.c
|
||
|
|
@@ -791,24 +791,11 @@ static void start_data_dma(struct pxa3xx
|
||
|
|
__func__, direction, info->dma_cookie, info->sg.length);
|
||
|
|
}
|
||
|
|
|
||
|
|
-static irqreturn_t pxa3xx_nand_irq_thread(int irq, void *data)
|
||
|
|
-{
|
||
|
|
- struct pxa3xx_nand_info *info = data;
|
||
|
|
-
|
||
|
|
- handle_data_pio(info);
|
||
|
|
-
|
||
|
|
- info->state = STATE_CMD_DONE;
|
||
|
|
- nand_writel(info, NDSR, NDSR_WRDREQ | NDSR_RDDREQ);
|
||
|
|
-
|
||
|
|
- return IRQ_HANDLED;
|
||
|
|
-}
|
||
|
|
-
|
||
|
|
static irqreturn_t pxa3xx_nand_irq(int irq, void *devid)
|
||
|
|
{
|
||
|
|
struct pxa3xx_nand_info *info = devid;
|
||
|
|
unsigned int status, is_completed = 0, is_ready = 0;
|
||
|
|
unsigned int ready, cmd_done;
|
||
|
|
- irqreturn_t ret = IRQ_HANDLED;
|
||
|
|
|
||
|
|
if (info->cs == 0) {
|
||
|
|
ready = NDSR_FLASH_RDY;
|
||
|
|
@@ -850,8 +837,7 @@ static irqreturn_t pxa3xx_nand_irq(int i
|
||
|
|
} else {
|
||
|
|
info->state = (status & NDSR_RDDREQ) ?
|
||
|
|
STATE_PIO_READING : STATE_PIO_WRITING;
|
||
|
|
- ret = IRQ_WAKE_THREAD;
|
||
|
|
- goto NORMAL_IRQ_EXIT;
|
||
|
|
+ handle_data_pio(info);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if (status & cmd_done) {
|
||
|
|
@@ -896,7 +882,7 @@ static irqreturn_t pxa3xx_nand_irq(int i
|
||
|
|
if (is_ready)
|
||
|
|
complete(&info->dev_ready);
|
||
|
|
NORMAL_IRQ_EXIT:
|
||
|
|
- return ret;
|
||
|
|
+ return IRQ_HANDLED;
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline int is_buf_blank(uint8_t *buf, size_t len)
|
||
|
|
@@ -1865,9 +1851,7 @@ static int alloc_nand_resource(struct pl
|
||
|
|
/* initialize all interrupts to be disabled */
|
||
|
|
disable_int(info, NDSR_MASK);
|
||
|
|
|
||
|
|
- ret = request_threaded_irq(irq, pxa3xx_nand_irq,
|
||
|
|
- pxa3xx_nand_irq_thread, IRQF_ONESHOT,
|
||
|
|
- pdev->name, info);
|
||
|
|
+ ret = request_irq(irq, pxa3xx_nand_irq, 0, pdev->name, info);
|
||
|
|
if (ret < 0) {
|
||
|
|
dev_err(&pdev->dev, "failed to request IRQ: %d\n", ret);
|
||
|
|
goto fail_free_buf;
|