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dma-mapping fixes for Linux 5.19 

- fix a regressin in setting swiotlb ->force_bounce (me)
  - make dma-debug less chatty (Rob Clark)
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Merge tag 'dma-mapping-5.19-2022-06-06' of git://git.infradead.org/users/hch/dma-mapping

Pull dma-mapping fixes from Christoph Hellwig:

 - fix a regressin in setting swiotlb ->force_bounce (me)

 - make dma-debug less chatty (Rob Clark)

* tag 'dma-mapping-5.19-2022-06-06' of git://git.infradead.org/users/hch/dma-mapping:
  swiotlb: fix setting ->force_bounce
  dma-debug: make things less spammy under memory pressure
This commit is contained in:
Linus Torvalds 2022-06-06 17:56:18 -07:00
parent f2906aa863 e15db62bc5
commit e71e60cd74
2 changed files with 7 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
kernel/dma/debug.c
View File

@ -564,7 +564,7 @@ static void add_dma_entry(struct dma_debug_entry *entry, unsigned long attrs)
rc = active_cacheline_insert(entry);
if (rc == -ENOMEM) {
pr_err("cacheline tracking ENOMEM, dma-debug disabled\n");
pr_err_once("cacheline tracking ENOMEM, dma-debug disabled\n");
global_disable = true;
} else if (rc == -EEXIST && !(attrs & DMA_ATTR_SKIP_CPU_SYNC)) {
err_printk(entry->dev, entry,

14
kernel/dma/swiotlb.c
View File

@ -192,7 +192,7 @@ void __init swiotlb_update_mem_attributes(void)
}
static void swiotlb_init_io_tlb_mem(struct io_tlb_mem *mem, phys_addr_t start,
unsigned long nslabs, bool late_alloc)
unsigned long nslabs, unsigned int flags, bool late_alloc)
{
void *vaddr = phys_to_virt(start);
unsigned long bytes = nslabs << IO_TLB_SHIFT, i;
@ -203,8 +203,7 @@ static void swiotlb_init_io_tlb_mem(struct io_tlb_mem *mem, phys_addr_t start,
mem->index = 0;
mem->late_alloc = late_alloc;
if (swiotlb_force_bounce)
mem->force_bounce = true;
mem->force_bounce = swiotlb_force_bounce || (flags & SWIOTLB_FORCE);
spin_lock_init(&mem->lock);
for (i = 0; i < mem->nslabs; i++) {
@ -275,8 +274,7 @@ retry:
panic("%s: Failed to allocate %zu bytes align=0x%lx\n",
__func__, alloc_size, PAGE_SIZE);
swiotlb_init_io_tlb_mem(mem, __pa(tlb), nslabs, false);
mem->force_bounce = flags & SWIOTLB_FORCE;
swiotlb_init_io_tlb_mem(mem, __pa(tlb), nslabs, flags, false);
if (flags & SWIOTLB_VERBOSE)
swiotlb_print_info();
@ -348,7 +346,7 @@ retry:
set_memory_decrypted((unsigned long)vstart,
(nslabs << IO_TLB_SHIFT) >> PAGE_SHIFT);
swiotlb_init_io_tlb_mem(mem, virt_to_phys(vstart), nslabs, true);
swiotlb_init_io_tlb_mem(mem, virt_to_phys(vstart), nslabs, 0, true);
swiotlb_print_info();
return 0;
@ -835,8 +833,8 @@ static int rmem_swiotlb_device_init(struct reserved_mem *rmem,
set_memory_decrypted((unsigned long)phys_to_virt(rmem->base),
rmem->size >> PAGE_SHIFT);
swiotlb_init_io_tlb_mem(mem, rmem->base, nslabs, false);
mem->force_bounce = true;
swiotlb_init_io_tlb_mem(mem, rmem->base, nslabs, SWIOTLB_FORCE,
false);
mem->for_alloc = true;
rmem->priv = mem;