3fc661a98c
As usual these patches were extracted from the raspberry pi repo: https://github.com/raspberrypi/linux/tree/rpi-4.4.y Also alphabetically order sound-soc kernel packages. Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
86 lines
2.4 KiB
Diff
86 lines
2.4 KiB
Diff
From 5bb7ea036f5dfa3e3e3e1c674cb3f06e8204743e Mon Sep 17 00:00:00 2001
|
|
From: Matthias Reichl <hias@horus.com>
|
|
Date: Mon, 16 Nov 2015 14:05:35 +0000
|
|
Subject: [PATCH 088/381] bcm2835-dma: Fix up convert to DMA pool
|
|
|
|
---
|
|
drivers/dma/bcm2835-dma.c | 36 ++++++++++++++++++++++++++----------
|
|
1 file changed, 26 insertions(+), 10 deletions(-)
|
|
|
|
--- a/drivers/dma/bcm2835-dma.c
|
|
+++ b/drivers/dma/bcm2835-dma.c
|
|
@@ -488,6 +488,17 @@ static struct dma_async_tx_descriptor *b
|
|
c->cyclic = true;
|
|
|
|
return vchan_tx_prep(&c->vc, &d->vd, flags);
|
|
+error_cb:
|
|
+ i--;
|
|
+ for (; i >= 0; i--) {
|
|
+ struct bcm2835_cb_entry *cb_entry = &d->cb_list[i];
|
|
+
|
|
+ dma_pool_free(c->cb_pool, cb_entry->cb, cb_entry->paddr);
|
|
+ }
|
|
+
|
|
+ kfree(d->cb_list);
|
|
+ kfree(d);
|
|
+ return NULL;
|
|
}
|
|
|
|
static struct dma_async_tx_descriptor *
|
|
@@ -534,6 +545,7 @@ bcm2835_dma_prep_slave_sg(struct dma_cha
|
|
if (!d)
|
|
return NULL;
|
|
|
|
+ d->c = c;
|
|
d->dir = direction;
|
|
|
|
if (c->ch >= 8) /* LITE channel */
|
|
@@ -553,15 +565,21 @@ bcm2835_dma_prep_slave_sg(struct dma_cha
|
|
d->frames += len / max_size + 1;
|
|
}
|
|
|
|
- /* Allocate memory for control blocks */
|
|
- d->control_block_size = d->frames * sizeof(struct bcm2835_dma_cb);
|
|
- d->control_block_base = dma_zalloc_coherent(chan->device->dev,
|
|
- d->control_block_size, &d->control_block_base_phys,
|
|
- GFP_NOWAIT);
|
|
- if (!d->control_block_base) {
|
|
+ d->cb_list = kcalloc(d->frames, sizeof(*d->cb_list), GFP_KERNEL);
|
|
+ if (!d->cb_list) {
|
|
kfree(d);
|
|
return NULL;
|
|
}
|
|
+ /* Allocate memory for control blocks */
|
|
+ for (i = 0; i < d->frames; i++) {
|
|
+ struct bcm2835_cb_entry *cb_entry = &d->cb_list[i];
|
|
+
|
|
+ cb_entry->cb = dma_pool_zalloc(c->cb_pool, GFP_ATOMIC,
|
|
+ &cb_entry->paddr);
|
|
+
|
|
+ if (!cb_entry->cb)
|
|
+ goto error_cb;
|
|
+ }
|
|
|
|
/*
|
|
* Iterate over all SG entries, create a control block
|
|
@@ -578,7 +596,7 @@ bcm2835_dma_prep_slave_sg(struct dma_cha
|
|
|
|
for (j = 0; j < len; j += max_size) {
|
|
struct bcm2835_dma_cb *control_block =
|
|
- &d->control_block_base[i + split_cnt];
|
|
+ d->cb_list[i + split_cnt].cb;
|
|
|
|
/* Setup addresses */
|
|
if (d->dir == DMA_DEV_TO_MEM) {
|
|
@@ -620,9 +638,7 @@ bcm2835_dma_prep_slave_sg(struct dma_cha
|
|
if (i < sg_len - 1 || len - j > max_size) {
|
|
/* Next block is the next frame. */
|
|
control_block->next =
|
|
- d->control_block_base_phys +
|
|
- sizeof(struct bcm2835_dma_cb) *
|
|
- (i + split_cnt + 1);
|
|
+ d->cb_list[i + split_cnt + 1].paddr;
|
|
} else {
|
|
/* Next block is empty. */
|
|
control_block->next = 0;
|