| Message ID | 20220416224549.627623-1-linus.walleij@linaro.org |
|---|---|
| State | New |
| Headers | show |
| Series | mmc: mmci: Break IRQ status loop when all zero | expand |
On Sun, 17 Apr 2022 at 00:47, Linus Walleij <linus.walleij@linaro.org> wrote: > > We iterate an extra time through the IRQ status handling > loop despite nothing had fired. Enabling the debug prints: > > mmci-pl18x 80005000.mmc: op 01 arg 00000000 flags 000000e1 > mmci-pl18x 80005000.mmc: irq0 (data+cmd) 00000001 > mmci-pl18x 80005000.mmc: irq0 (data+cmd) 00000000 > mmci-pl18x 80005000.mmc: op 01 arg 40ff8080 flags 000000e1 > mmci-pl18x 80005000.mmc: irq0 (data+cmd) 00000001 > mmci-pl18x 80005000.mmc: irq0 (data+cmd) 00000000 > > It is pointless to loop through the function when status > is zero. Just break the loop if the status is zero. > > Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Applied for next, thanks! Kind regards Uffe > --- > drivers/mmc/host/mmci.c | 2 ++ > 1 file changed, 2 insertions(+) > > diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c > index 45b8608c935c..f3cf3152a397 100644 > --- a/drivers/mmc/host/mmci.c > +++ b/drivers/mmc/host/mmci.c > @@ -1619,6 +1619,8 @@ static irqreturn_t mmci_irq(int irq, void *dev_id) > > do { > status = readl(host->base + MMCISTATUS); > + if (!status) > + break; > > if (host->singleirq) { > if (status & host->mask1_reg) > -- > 2.35.1 >
diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c index 45b8608c935c..f3cf3152a397 100644 --- a/drivers/mmc/host/mmci.c +++ b/drivers/mmc/host/mmci.c @@ -1619,6 +1619,8 @@ static irqreturn_t mmci_irq(int irq, void *dev_id) do { status = readl(host->base + MMCISTATUS); + if (!status) + break; if (host->singleirq) { if (status & host->mask1_reg)
We iterate an extra time through the IRQ status handling loop despite nothing had fired. Enabling the debug prints: mmci-pl18x 80005000.mmc: op 01 arg 00000000 flags 000000e1 mmci-pl18x 80005000.mmc: irq0 (data+cmd) 00000001 mmci-pl18x 80005000.mmc: irq0 (data+cmd) 00000000 mmci-pl18x 80005000.mmc: op 01 arg 40ff8080 flags 000000e1 mmci-pl18x 80005000.mmc: irq0 (data+cmd) 00000001 mmci-pl18x 80005000.mmc: irq0 (data+cmd) 00000000 It is pointless to loop through the function when status is zero. Just break the loop if the status is zero. Signed-off-by: Linus Walleij <linus.walleij@linaro.org> --- drivers/mmc/host/mmci.c | 2 ++ 1 file changed, 2 insertions(+)