korg/linux
0
0
Fork 0
mirror of https://mirrors.bfsu.edu.cn/git/linux.git synced 2024-11-15 16:24:13 +08:00
Code Issues Packages Projects Releases Wiki Activity

mmc: sh_mmcif: Terminate DMA transactions when detecting timeout or error

Browse Source 
If a DMA transaction fails, terminate all outstanding DMA transfers and
unmap buffers.

Signed-off-by: Teppei Kamijou <teppei.kamijou.yb@renesas.com>
Signed-off-by: Shinya Kuribayashi <shinya.kuribayashi.px@renesas.com>
[g.liakhovetski@gmx.de: forward-port, add dma_unmap_sg() in error cases]
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Chris Ball <cjb@laptop.org>
This commit is contained in:
Teppei Kamijou 2012-12-12 15:38:12 +01:00 committed by Chris Ball
parent 5df460b15e
commit eae3098365
1 changed files with 17 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

31
drivers/mmc/host/sh_mmcif.c
View File

@ -263,15 +263,6 @@ static void mmcif_dma_complete(void *arg)
dev_name(&host->pd->dev)))
return;
if (data->flags & MMC_DATA_READ)
dma_unmap_sg(host->chan_rx->device->dev,
data->sg, data->sg_len,
DMA_FROM_DEVICE);
else
dma_unmap_sg(host->chan_tx->device->dev,
data->sg, data->sg_len,
DMA_TO_DEVICE);
complete(&host->dma_complete);
}
@ -1088,14 +1079,20 @@ static bool sh_mmcif_end_cmd(struct sh_mmcif_host *host)
/* Running in the IRQ thread, can sleep */
time = wait_for_completion_interruptible_timeout(&host->dma_complete,
host->timeout);
if (data->flags & MMC_DATA_READ)
dma_unmap_sg(host->chan_rx->device->dev,
data->sg, data->sg_len,
DMA_FROM_DEVICE);
else
dma_unmap_sg(host->chan_tx->device->dev,
data->sg, data->sg_len,
DMA_TO_DEVICE);
if (host->sd_error) {
dev_err(host->mmc->parent,
"Error IRQ while waiting for DMA completion!\n");
/* Woken up by an error IRQ: abort DMA */
if (data->flags & MMC_DATA_READ)
dmaengine_terminate_all(host->chan_rx);
else
dmaengine_terminate_all(host->chan_tx);
data->error = sh_mmcif_error_manage(host);
} else if (!time) {
data->error = -ETIMEDOUT;
@ -1106,8 +1103,14 @@ static bool sh_mmcif_end_cmd(struct sh_mmcif_host *host)
BUF_ACC_DMAREN | BUF_ACC_DMAWEN);
host->dma_active = false;
if (data->error)
if (data->error) {
data->bytes_xfered = 0;
/* Abort DMA */
if (data->flags & MMC_DATA_READ)
dmaengine_terminate_all(host->chan_rx);
else
dmaengine_terminate_all(host->chan_tx);
}
return false;
}