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mmc: mmci: Break IRQ status loop when all zero 

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>
Link: https://lore.kernel.org/r/20220416224549.627623-1-linus.walleij@linaro.org
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Linus Walleij 2022-04-17 00:45:49 +02:00 committed by Ulf Hansson
parent 238b638b30
commit f7ad75041b
1 changed files with 2 additions and 0 deletions
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2
drivers/mmc/host/mmci.c
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@ -1619,6 +1619,8 @@ static irqreturn_t mmci_irq(int irq, void *dev_id)
do { do {
status = readl(host->base + MMCISTATUS); status = readl(host->base + MMCISTATUS);
if (!status)
break;
if (host->singleirq) { if (host->singleirq) {
if (status & host->mask1_reg) if (status & host->mask1_reg)