redonkable
/
alistair23-linux
1
0
Fork 0
Code Releases Activity

mmc: sdhci: Avoid needless loop while handling SDIO interrupts in sdhci_irq 

Ignore Card Interrupt bit in the interrupt status if we already
know that mmc_signal_sdio_irq() is going to be called at the end of
sdhci_irq(). This avoids a needless loop in sdhci_irq() repeatedly
reading interrupt status and doing nothing.

Signed-off-by: Alexey Neyman <stilor@att.net>
Acked-by: Dong Aisheng <b29396@freescale.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
hifive-unleashed-5.1
Alexey Neyman 2013-11-05 19:40:36 -08:00 committed by Chris Ball
parent 4d22378221
commit 0a8fd09ca9
1 changed files with 8 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
drivers/mmc/host/sdhci.c
View File

@ -2501,6 +2501,14 @@ again:
result = IRQ_HANDLED;
intmask = sdhci_readl(host, SDHCI_INT_STATUS);
/*
* If we know we'll call the driver to signal SDIO IRQ, disregard
* further indications of Card Interrupt in the status to avoid a
* needless loop.
*/
if (cardint)
intmask &= ~SDHCI_INT_CARD_INT;
if (intmask && --max_loops)
goto again;
out: