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mmc: tmio_mmc: fix CMD irq handling
With current code card insert/eject interrupts will acknowledge outstanding commands. Normally this seems to be no problem, however if the hardware gets stuck and no interrupts for CMD_TIMEOUT or CMD_RESPEND are generated, then inserting and ejecting cards will falsely acknowledge outstanding commands from the core. This patch changes the behavior so that CMDs are only acked, if CMD_TIMEOUT or CMD_RESPEND is received. Signed-off-by: Arnd Hannemann <arnd@arndnet.de> Signed-off-by: Chris Ball <cjb@laptop.org>
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1 changed files with 4 additions and 2 deletions
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@ -727,8 +727,10 @@ static irqreturn_t tmio_mmc_irq(int irq, void *devid)
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*/
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/* Command completion */
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if (ireg & TMIO_MASK_CMD) {
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ack_mmc_irqs(host, TMIO_MASK_CMD);
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if (ireg & (TMIO_STAT_CMDRESPEND | TMIO_STAT_CMDTIMEOUT)) {
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ack_mmc_irqs(host,
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TMIO_STAT_CMDRESPEND |
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TMIO_STAT_CMDTIMEOUT);
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tmio_mmc_cmd_irq(host, status);
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}
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