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vme: stop DMA transfer on interruption 

Signed-off-by: Dmitry Kalinkin <dmitry.kalinkin@gmail.com>
Cc: Igor Alekseev <igor.alekseev@itep.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Dmitry Kalinkin 2015-05-28 15:07:01 +03:00 committed by Greg Kroah-Hartman
parent b2383c90a9
commit 75c66b6db7
2 changed files with 27 additions and 5 deletions
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17
drivers/vme/bridges/vme_ca91cx42.c
View File

@ -1192,7 +1192,7 @@ static int ca91cx42_dma_list_exec(struct vme_dma_list *list)
{
struct vme_dma_resource *ctrlr;
struct ca91cx42_dma_entry *entry;
int retval = 0;
int retval;
dma_addr_t bus_addr;
u32 val;
struct device *dev;
@ -1245,8 +1245,18 @@ static int ca91cx42_dma_list_exec(struct vme_dma_list *list)
iowrite32(val, bridge->base + DGCS);
wait_event_interruptible(bridge->dma_queue,
ca91cx42_dma_busy(ctrlr->parent));
retval = wait_event_interruptible(bridge->dma_queue,
ca91cx42_dma_busy(ctrlr->parent));
if (retval) {
val = ioread32(bridge->base + DGCS);
iowrite32(val | CA91CX42_DGCS_STOP_REQ, bridge->base + DGCS);
/* Wait for the operation to abort */
wait_event(bridge->dma_queue,
ca91cx42_dma_busy(ctrlr->parent));
retval = -EINTR;
goto exit;
}
/*
* Read status register, this register is valid until we kick off a
@ -1261,6 +1271,7 @@ static int ca91cx42_dma_list_exec(struct vme_dma_list *list)
val = ioread32(bridge->base + DCTL);
}
exit:
/* Remove list from running list */
mutex_lock(&ctrlr->mtx);
list_del(&list->list);

15
drivers/vme/bridges/vme_tsi148.c
View File

@ -1892,7 +1892,7 @@ static int tsi148_dma_busy(struct vme_bridge *tsi148_bridge, int channel)
static int tsi148_dma_list_exec(struct vme_dma_list *list)
{
struct vme_dma_resource *ctrlr;
int channel, retval = 0;
int channel, retval;
struct tsi148_dma_entry *entry;
u32 bus_addr_high, bus_addr_low;
u32 val, dctlreg = 0;
@ -1942,9 +1942,19 @@ static int tsi148_dma_list_exec(struct vme_dma_list *list)
iowrite32be(dctlreg | TSI148_LCSR_DCTL_DGO, bridge->base +
TSI148_LCSR_DMA[channel] + TSI148_LCSR_OFFSET_DCTL);
wait_event_interruptible(bridge->dma_queue[channel],
retval = wait_event_interruptible(bridge->dma_queue[channel],
tsi148_dma_busy(ctrlr->parent, channel));
if (retval) {
iowrite32be(dctlreg | TSI148_LCSR_DCTL_ABT, bridge->base +
TSI148_LCSR_DMA[channel] + TSI148_LCSR_OFFSET_DCTL);
/* Wait for the operation to abort */
wait_event(bridge->dma_queue[channel],
tsi148_dma_busy(ctrlr->parent, channel));
retval = -EINTR;
goto exit;
}
/*
* Read status register, this register is valid until we kick off a
* new transfer.
@ -1957,6 +1967,7 @@ static int tsi148_dma_list_exec(struct vme_dma_list *list)
retval = -EIO;
}
exit:
/* Remove list from running list */
mutex_lock(&ctrlr->mtx);
list_del(&list->list);