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-rw-r--r--drivers/dma/dmaengine.c4
-rw-r--r--drivers/dma/dmatest.c22
-rw-r--r--drivers/dma/ioat_dma.c11
-rw-r--r--drivers/dma/iop-adma.c11
-rw-r--r--drivers/dma/iovlock.c17
5 files changed, 34 insertions, 31 deletions
diff --git a/drivers/dma/dmaengine.c b/drivers/dma/dmaengine.c
index dc003a3a787..5317e08221e 100644
--- a/drivers/dma/dmaengine.c
+++ b/drivers/dma/dmaengine.c
@@ -399,8 +399,8 @@ int dma_async_device_register(struct dma_device *device)
chan->chan_id = chancnt++;
chan->dev.class = &dma_devclass;
chan->dev.parent = device->dev;
- snprintf(chan->dev.bus_id, BUS_ID_SIZE, "dma%dchan%d",
- device->dev_id, chan->chan_id);
+ dev_set_name(&chan->dev, "dma%dchan%d",
+ device->dev_id, chan->chan_id);
rc = device_register(&chan->dev);
if (rc) {
diff --git a/drivers/dma/dmatest.c b/drivers/dma/dmatest.c
index d1e381e35a9..ed9636bfb54 100644
--- a/drivers/dma/dmatest.c
+++ b/drivers/dma/dmatest.c
@@ -20,11 +20,11 @@ static unsigned int test_buf_size = 16384;
module_param(test_buf_size, uint, S_IRUGO);
MODULE_PARM_DESC(test_buf_size, "Size of the memcpy test buffer");
-static char test_channel[BUS_ID_SIZE];
+static char test_channel[20];
module_param_string(channel, test_channel, sizeof(test_channel), S_IRUGO);
MODULE_PARM_DESC(channel, "Bus ID of the channel to test (default: any)");
-static char test_device[BUS_ID_SIZE];
+static char test_device[20];
module_param_string(device, test_device, sizeof(test_device), S_IRUGO);
MODULE_PARM_DESC(device, "Bus ID of the DMA Engine to test (default: any)");
@@ -80,14 +80,14 @@ static bool dmatest_match_channel(struct dma_chan *chan)
{
if (test_channel[0] == '\0')
return true;
- return strcmp(chan->dev.bus_id, test_channel) == 0;
+ return strcmp(dev_name(&chan->dev), test_channel) == 0;
}
static bool dmatest_match_device(struct dma_device *device)
{
if (test_device[0] == '\0')
return true;
- return strcmp(device->dev->bus_id, test_device) == 0;
+ return strcmp(dev_name(device->dev), test_device) == 0;
}
static unsigned long dmatest_random(void)
@@ -332,7 +332,7 @@ static enum dma_state_client dmatest_add_channel(struct dma_chan *chan)
dtc = kmalloc(sizeof(struct dmatest_chan), GFP_KERNEL);
if (!dtc) {
- pr_warning("dmatest: No memory for %s\n", chan->dev.bus_id);
+ pr_warning("dmatest: No memory for %s\n", dev_name(&chan->dev));
return DMA_NAK;
}
@@ -343,16 +343,16 @@ static enum dma_state_client dmatest_add_channel(struct dma_chan *chan)
thread = kzalloc(sizeof(struct dmatest_thread), GFP_KERNEL);
if (!thread) {
pr_warning("dmatest: No memory for %s-test%u\n",
- chan->dev.bus_id, i);
+ dev_name(&chan->dev), i);
break;
}
thread->chan = dtc->chan;
smp_wmb();
thread->task = kthread_run(dmatest_func, thread, "%s-test%u",
- chan->dev.bus_id, i);
+ dev_name(&chan->dev), i);
if (IS_ERR(thread->task)) {
pr_warning("dmatest: Failed to run thread %s-test%u\n",
- chan->dev.bus_id, i);
+ dev_name(&chan->dev), i);
kfree(thread);
break;
}
@@ -362,7 +362,7 @@ static enum dma_state_client dmatest_add_channel(struct dma_chan *chan)
list_add_tail(&thread->node, &dtc->threads);
}
- pr_info("dmatest: Started %u threads using %s\n", i, chan->dev.bus_id);
+ pr_info("dmatest: Started %u threads using %s\n", i, dev_name(&chan->dev));
list_add_tail(&dtc->node, &dmatest_channels);
nr_channels++;
@@ -379,7 +379,7 @@ static enum dma_state_client dmatest_remove_channel(struct dma_chan *chan)
list_del(&dtc->node);
dmatest_cleanup_channel(dtc);
pr_debug("dmatest: lost channel %s\n",
- chan->dev.bus_id);
+ dev_name(&chan->dev));
return DMA_ACK;
}
}
@@ -418,7 +418,7 @@ dmatest_event(struct dma_client *client, struct dma_chan *chan,
default:
pr_info("dmatest: Unhandled event %u (%s)\n",
- state, chan->dev.bus_id);
+ state, dev_name(&chan->dev));
break;
}
diff --git a/drivers/dma/ioat_dma.c b/drivers/dma/ioat_dma.c
index b0438c4f0c3..ecd743f7cc6 100644
--- a/drivers/dma/ioat_dma.c
+++ b/drivers/dma/ioat_dma.c
@@ -525,7 +525,7 @@ static dma_cookie_t ioat1_tx_submit(struct dma_async_tx_descriptor *tx)
}
hw->ctl = IOAT_DMA_DESCRIPTOR_CTL_CP_STS;
- if (new->async_tx.callback) {
+ if (first->async_tx.callback) {
hw->ctl |= IOAT_DMA_DESCRIPTOR_CTL_INT_GN;
if (first != new) {
/* move callback into to last desc */
@@ -617,7 +617,7 @@ static dma_cookie_t ioat2_tx_submit(struct dma_async_tx_descriptor *tx)
}
hw->ctl |= IOAT_DMA_DESCRIPTOR_CTL_CP_STS;
- if (new->async_tx.callback) {
+ if (first->async_tx.callback) {
hw->ctl |= IOAT_DMA_DESCRIPTOR_CTL_INT_GN;
if (first != new) {
/* move callback into to last desc */
@@ -807,6 +807,12 @@ static void ioat_dma_free_chan_resources(struct dma_chan *chan)
struct ioat_desc_sw *desc, *_desc;
int in_use_descs = 0;
+ /* Before freeing channel resources first check
+ * if they have been previously allocated for this channel.
+ */
+ if (ioat_chan->desccount == 0)
+ return;
+
tasklet_disable(&ioat_chan->cleanup_task);
ioat_dma_memcpy_cleanup(ioat_chan);
@@ -869,6 +875,7 @@ static void ioat_dma_free_chan_resources(struct dma_chan *chan)
ioat_chan->last_completion = ioat_chan->completion_addr = 0;
ioat_chan->pending = 0;
ioat_chan->dmacount = 0;
+ ioat_chan->desccount = 0;
ioat_chan->watchdog_completion = 0;
ioat_chan->last_compl_desc_addr_hw = 0;
ioat_chan->watchdog_tcp_cookie =
diff --git a/drivers/dma/iop-adma.c b/drivers/dma/iop-adma.c
index 71fba82462c..c7a9306d951 100644
--- a/drivers/dma/iop-adma.c
+++ b/drivers/dma/iop-adma.c
@@ -411,6 +411,7 @@ iop_adma_tx_submit(struct dma_async_tx_descriptor *tx)
int slot_cnt;
int slots_per_op;
dma_cookie_t cookie;
+ dma_addr_t next_dma;
grp_start = sw_desc->group_head;
slot_cnt = grp_start->slot_cnt;
@@ -425,12 +426,12 @@ iop_adma_tx_submit(struct dma_async_tx_descriptor *tx)
&old_chain_tail->chain_node);
/* fix up the hardware chain */
- iop_desc_set_next_desc(old_chain_tail, grp_start->async_tx.phys);
+ next_dma = grp_start->async_tx.phys;
+ iop_desc_set_next_desc(old_chain_tail, next_dma);
+ BUG_ON(iop_desc_get_next_desc(old_chain_tail) != next_dma); /* flush */
- /* 1/ don't add pre-chained descriptors
- * 2/ dummy read to flush next_desc write
- */
- BUG_ON(iop_desc_get_next_desc(sw_desc));
+ /* check for pre-chained descriptors */
+ iop_paranoia(iop_desc_get_next_desc(sw_desc));
/* increment the pending count by the number of slots
* memcpy operations have a 1:1 (slot:operation) relation
diff --git a/drivers/dma/iovlock.c b/drivers/dma/iovlock.c
index e763d723e4c..9f6fe46a9b8 100644
--- a/drivers/dma/iovlock.c
+++ b/drivers/dma/iovlock.c
@@ -55,7 +55,6 @@ struct dma_pinned_list *dma_pin_iovec_pages(struct iovec *iov, size_t len)
int nr_iovecs = 0;
int iovec_len_used = 0;
int iovec_pages_used = 0;
- long err;
/* don't pin down non-user-based iovecs */
if (segment_eq(get_fs(), KERNEL_DS))
@@ -72,23 +71,21 @@ struct dma_pinned_list *dma_pin_iovec_pages(struct iovec *iov, size_t len)
local_list = kmalloc(sizeof(*local_list)
+ (nr_iovecs * sizeof (struct dma_page_list))
+ (iovec_pages_used * sizeof (struct page*)), GFP_KERNEL);
- if (!local_list) {
- err = -ENOMEM;
+ if (!local_list)
goto out;
- }
/* list of pages starts right after the page list array */
pages = (struct page **) &local_list->page_list[nr_iovecs];
+ local_list->nr_iovecs = 0;
+
for (i = 0; i < nr_iovecs; i++) {
struct dma_page_list *page_list = &local_list->page_list[i];
len -= iov[i].iov_len;
- if (!access_ok(VERIFY_WRITE, iov[i].iov_base, iov[i].iov_len)) {
- err = -EFAULT;
+ if (!access_ok(VERIFY_WRITE, iov[i].iov_base, iov[i].iov_len))
goto unpin;
- }
page_list->nr_pages = num_pages_spanned(&iov[i]);
page_list->base_address = iov[i].iov_base;
@@ -109,10 +106,8 @@ struct dma_pinned_list *dma_pin_iovec_pages(struct iovec *iov, size_t len)
NULL);
up_read(&current->mm->mmap_sem);
- if (ret != page_list->nr_pages) {
- err = -ENOMEM;
+ if (ret != page_list->nr_pages)
goto unpin;
- }
local_list->nr_iovecs = i + 1;
}
@@ -122,7 +117,7 @@ struct dma_pinned_list *dma_pin_iovec_pages(struct iovec *iov, size_t len)
unpin:
dma_unpin_iovec_pages(local_list);
out:
- return ERR_PTR(err);
+ return NULL;
}
void dma_unpin_iovec_pages(struct dma_pinned_list *pinned_list)
generated by cgit v1.2.3 (git 2.25.1) at 2024-08-19 17:46:18 +0000