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mmc: dw_mmc: correct mishandling error interrupt 

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 <tgih.jun@samsung.com>
Acked-by: Jaehoon Chung <jh80.chung@samsung.com>
Acked-by: Will Newton <will.newton@imgtec.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
This commit is contained in:
Seungwon Jeon 2012-08-01 09:30:40 +09:00 committed by Chris Ball
parent 182c908159
commit 9b2026a125
1 changed files with 1 additions and 3 deletions
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4
drivers/mmc/host/dw_mmc.c
View File

@ -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) {