diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/Kconfig.debug | 11 | ||||
| -rw-r--r-- | lib/dma-debug.c | 10 | ||||
| -rw-r--r-- | lib/dynamic_debug.c | 14 | ||||
| -rw-r--r-- | lib/genalloc.c | 5 | ||||
| -rw-r--r-- | lib/swiotlb.c | 7 |
5 files changed, 20 insertions, 27 deletions
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug index e0e2eebf7ab3..dbf94a7d25a8 100644 --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug @@ -1556,17 +1556,6 @@ config PROVIDE_OHCI1394_DMA_INIT See Documentation/debugging-via-ohci1394.txt for more information. -config FIREWIRE_OHCI_REMOTE_DMA - bool "Remote debugging over FireWire with firewire-ohci" - depends on FIREWIRE_OHCI - help - This option lets you use the FireWire bus for remote debugging - with help of the firewire-ohci driver. It enables unfiltered - remote DMA in firewire-ohci. - See Documentation/debugging-via-ohci1394.txt for more information. - - If unsure, say N. - config BUILD_DOCSRC bool "Build targets in Documentation/ tree" depends on HEADERS_CHECK diff --git a/lib/dma-debug.c b/lib/dma-debug.c index c38083871f11..2defd1308b04 100644 --- a/lib/dma-debug.c +++ b/lib/dma-debug.c @@ -463,7 +463,7 @@ static int active_pfn_set_overlap(unsigned long pfn, int overlap) int i; if (overlap > ACTIVE_PFN_MAX_OVERLAP || overlap < 0) - return 0; + return overlap; for (i = RADIX_TREE_MAX_TAGS - 1; i >= 0; i--) if (overlap & 1 << i) @@ -486,7 +486,7 @@ static void active_pfn_inc_overlap(unsigned long pfn) * debug_dma_assert_idle() as the pfn may be marked idle * prematurely. */ - WARN_ONCE(overlap == 0, + WARN_ONCE(overlap > ACTIVE_PFN_MAX_OVERLAP, "DMA-API: exceeded %d overlapping mappings of pfn %lx\n", ACTIVE_PFN_MAX_OVERLAP, pfn); } @@ -517,7 +517,11 @@ static void active_pfn_remove(struct dma_debug_entry *entry) unsigned long flags; spin_lock_irqsave(&radix_lock, flags); - if (active_pfn_dec_overlap(entry->pfn) == 0) + /* since we are counting overlaps the final put of the + * entry->pfn will occur when the overlap count is 0. + * active_pfn_dec_overlap() returns -1 in that case + */ + if (active_pfn_dec_overlap(entry->pfn) < 0) radix_tree_delete(&dma_active_pfn, entry->pfn); spin_unlock_irqrestore(&radix_lock, flags); } diff --git a/lib/dynamic_debug.c b/lib/dynamic_debug.c index 600ac57e2777..7288e38e1757 100644 --- a/lib/dynamic_debug.c +++ b/lib/dynamic_debug.c @@ -268,14 +268,12 @@ static int ddebug_tokenize(char *buf, char *words[], int maxwords) */ static inline int parse_lineno(const char *str, unsigned int *val) { - char *end = NULL; BUG_ON(str == NULL); if (*str == '\0') { *val = 0; return 0; } - *val = simple_strtoul(str, &end, 10); - if (end == NULL || end == str || *end != '\0') { + if (kstrtouint(str, 10, val) < 0) { pr_err("bad line-number: %s\n", str); return -EINVAL; } @@ -348,14 +346,14 @@ static int ddebug_parse_query(char *words[], int nwords, } if (last) *last++ = '\0'; - if (parse_lineno(first, &query->first_lineno) < 0) { - pr_err("line-number is <0\n"); + if (parse_lineno(first, &query->first_lineno) < 0) return -EINVAL; - } if (last) { /* range <first>-<last> */ - if (parse_lineno(last, &query->last_lineno) - < query->first_lineno) { + if (parse_lineno(last, &query->last_lineno) < 0) + return -EINVAL; + + if (query->last_lineno < query->first_lineno) { pr_err("last-line:%d < 1st-line:%d\n", query->last_lineno, query->first_lineno); diff --git a/lib/genalloc.c b/lib/genalloc.c index dda31168844f..bdb9a456bcbb 100644 --- a/lib/genalloc.c +++ b/lib/genalloc.c @@ -316,7 +316,7 @@ EXPORT_SYMBOL(gen_pool_alloc); * gen_pool_dma_alloc - allocate special memory from the pool for DMA usage * @pool: pool to allocate from * @size: number of bytes to allocate from the pool - * @dma: dma-view physical address + * @dma: dma-view physical address return value. Use NULL if unneeded. * * Allocate the requested number of bytes from the specified pool. * Uses the pool allocation function (with first-fit algorithm by default). @@ -334,7 +334,8 @@ void *gen_pool_dma_alloc(struct gen_pool *pool, size_t size, dma_addr_t *dma) if (!vaddr) return NULL; - *dma = gen_pool_virt_to_phys(pool, vaddr); + if (dma) + *dma = gen_pool_virt_to_phys(pool, vaddr); return (void *)vaddr; } diff --git a/lib/swiotlb.c b/lib/swiotlb.c index 615f3de4b5ce..b604b831f4d1 100644 --- a/lib/swiotlb.c +++ b/lib/swiotlb.c @@ -172,7 +172,7 @@ int __init swiotlb_init_with_tbl(char *tlb, unsigned long nslabs, int verbose) /* * Get the overflow emergency buffer */ - v_overflow_buffer = memblock_virt_alloc_nopanic( + v_overflow_buffer = memblock_virt_alloc_low_nopanic( PAGE_ALIGN(io_tlb_overflow), PAGE_SIZE); if (!v_overflow_buffer) @@ -220,7 +220,7 @@ swiotlb_init(int verbose) bytes = io_tlb_nslabs << IO_TLB_SHIFT; /* Get IO TLB memory from the low pages */ - vstart = memblock_virt_alloc_nopanic(PAGE_ALIGN(bytes), PAGE_SIZE); + vstart = memblock_virt_alloc_low_nopanic(PAGE_ALIGN(bytes), PAGE_SIZE); if (vstart && !swiotlb_init_with_tbl(vstart, io_tlb_nslabs, verbose)) return; @@ -510,7 +510,8 @@ phys_addr_t swiotlb_tbl_map_single(struct device *hwdev, not_found: spin_unlock_irqrestore(&io_tlb_lock, flags); - dev_warn(hwdev, "swiotlb buffer is full\n"); + if (printk_ratelimit()) + dev_warn(hwdev, "swiotlb buffer is full (sz: %zd bytes)\n", size); return SWIOTLB_MAP_ERROR; found: spin_unlock_irqrestore(&io_tlb_lock, flags); |