korg/linux
0
0
Fork 0
mirror of https://mirrors.bfsu.edu.cn/git/linux.git synced 2024-11-24 20:54:10 +08:00
Code Issues Packages Projects Releases Wiki Activity

mmc: dw_mmc: fix error handling in PIO mode

Browse Source 
Data transfer will be continued until all the bytes are transmitted,
even if data crc error occurs during a multiple-block data transfer.
This means RXDR/TXDR interrupts will occurs until data transfer is
terminated. Early setting of host->sg to NULL prevents going into
xxx_data_pio functions, hence permanent unhandled RXDR/TXDR interrupts
occurs. And checking error interrupt status in the xxx_data_pio functions
is no need because dw_mci_interrupt does do the same. This patch also
removes it.

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 09:30:46 +09:00 committed by Chris Ball
parent 9b2026a125
commit e74f3a9c99
1 changed files with 2 additions and 27 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

29
drivers/mmc/host/dw_mmc.c
View File

@ -1429,22 +1429,10 @@ static void dw_mci_read_data_pio(struct dw_mci *host)
nbytes += len;
remain -= len;
} while (remain);
sg_miter->consumed = offset;
sg_miter->consumed = offset;
status = mci_readl(host, MINTSTS);
mci_writel(host, RINTSTS, SDMMC_INT_RXDR);
if (status & DW_MCI_DATA_ERROR_FLAGS) {
host->data_status = status;
data->bytes_xfered += nbytes;
sg_miter_stop(sg_miter);
host->sg = NULL;
smp_wmb();
set_bit(EVENT_DATA_ERROR, &host->pending_events);
tasklet_schedule(&host->tasklet);
return;
}
} while (status & SDMMC_INT_RXDR); /*if the RXDR is ready read again*/
data->bytes_xfered += nbytes;
@ -1497,23 +1485,10 @@ static void dw_mci_write_data_pio(struct dw_mci *host)
nbytes += len;
remain -= len;
} while (remain);
sg_miter->consumed = offset;
sg_miter->consumed = offset;
status = mci_readl(host, MINTSTS);
mci_writel(host, RINTSTS, SDMMC_INT_TXDR);
if (status & DW_MCI_DATA_ERROR_FLAGS) {
host->data_status = status;
data->bytes_xfered += nbytes;
sg_miter_stop(sg_miter);
host->sg = NULL;
smp_wmb();
set_bit(EVENT_DATA_ERROR, &host->pending_events);
tasklet_schedule(&host->tasklet);
return;
}
} while (status & SDMMC_INT_TXDR); /* if TXDR write again */
data->bytes_xfered += nbytes;