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dmaengine fixes for 4.11-rc5

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Couple of minor fixes for 4.11
  - array bound fix for __get_unmap_pool()
  - cyclic period splitting for bcm2835
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Merge tag 'dmaengine-fix-4.11-rc5' of git://git.infradead.org/users/vkoul/slave-dma

Pull dmaengine fixes from Vinod Koul:
 "A couple of minor fixes for 4.11:

   - array bound fix for __get_unmap_pool()

   - cyclic period splitting for bcm2835"

* tag 'dmaengine-fix-4.11-rc5' of git://git.infradead.org/users/vkoul/slave-dma:
  dmaengine: Fix array index out of bounds warning in __get_unmap_pool()
  dmaengine: bcm2835: Fix cyclic DMA period splitting
This commit is contained in:
Linus Torvalds 2017-04-02 16:29:34 -07:00
commit f49237bfcd
2 changed files with 6 additions and 1 deletions
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5
drivers/dma/bcm2835-dma.c
View file

@ -251,8 +251,11 @@ static void bcm2835_dma_create_cb_set_length(
*/
/* have we filled in period_length yet? */
if (*total_len + control_block->length < period_len)
if (*total_len + control_block->length < period_len) {
/* update number of bytes in this period so far */
*total_len += control_block->length;
return;
}
/* calculate the length that remains to reach period_length */
control_block->length = period_len - *total_len;

2
drivers/dma/dmaengine.c
View file

@ -1108,12 +1108,14 @@ static struct dmaengine_unmap_pool *__get_unmap_pool(int nr)
switch (order) {
case 0 ... 1:
return &unmap_pool[0];
#if IS_ENABLED(CONFIG_DMA_ENGINE_RAID)
case 2 ... 4:
return &unmap_pool[1];
case 5 ... 7:
return &unmap_pool[2];
case 8:
return &unmap_pool[3];
#endif
default:
BUG();
return NULL;