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mmc: dw_mmc: correct mishandling error interrupt

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Datasheet of SYNOPSYS mentions that DTO(Data Transfer Over) interrupt
will be raised even if some error interrupts, however it is actually
found that DTO does not occur. SYNOPSYS has confirmed this issue.
Current implementation defers the call of tasklet_schedule until DTO
when the error interrupts is happened. This patch fixes error handling.

Signed-off-by: Seungwon Jeon <[email protected]>
Acked-by: Jaehoon Chung <[email protected]>
Acked-by: Will Newton <[email protected]>
Signed-off-by: Chris Ball <[email protected]>
This commit is contained in:
Seungwon Jeon 2012-08-01 09:30:40 +09:00 • committed by Chris Ball
commit 9b2026a125
1 changed files with 1 additions and 3 deletions
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4
drivers/mmc/host/dw_mmc.c
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@ -1580,9 +1580,7 @@ static irqreturn_t dw_mci_interrupt(int irq, void *dev_id)
host->data_status = pending;
smp_wmb();
set_bit(EVENT_DATA_ERROR, &host->pending_events);
if (!(pending & (SDMMC_INT_DTO | SDMMC_INT_DCRC |
SDMMC_INT_SBE | SDMMC_INT_EBE)))
tasklet_schedule(&host->tasklet);
tasklet_schedule(&host->tasklet);
}
if (pending & SDMMC_INT_DATA_OVER) {