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-rw-r--r--lib/Makefile4
-rw-r--r--lib/dma-debug.c68
-rw-r--r--lib/sha1.c1
-rw-r--r--lib/xz/xz_dec_bcj.c27
4 files changed, 84 insertions, 16 deletions
diff --git a/lib/Makefile b/lib/Makefile
index d5d175c8a6ca..3f5bc6d903e0 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -12,7 +12,7 @@ lib-y := ctype.o string.o vsprintf.o cmdline.o \
idr.o int_sqrt.o extable.o prio_tree.o \
sha1.o md5.o irq_regs.o reciprocal_div.o argv_split.o \
proportions.o prio_heap.o ratelimit.o show_mem.o \
- is_single_threaded.o plist.o decompress.o find_next_bit.o
+ is_single_threaded.o plist.o decompress.o
lib-$(CONFIG_MMU) += ioremap.o
lib-$(CONFIG_SMP) += cpumask.o
@@ -22,7 +22,7 @@ lib-y += kobject.o kref.o klist.o
obj-y += bcd.o div64.o sort.o parser.o halfmd4.o debug_locks.o random32.o \
bust_spinlocks.o hexdump.o kasprintf.o bitmap.o scatterlist.o \
string_helpers.o gcd.o lcm.o list_sort.o uuid.o flex_array.o \
- bsearch.o find_last_bit.o
+ bsearch.o find_last_bit.o find_next_bit.o
obj-y += kstrtox.o
obj-$(CONFIG_TEST_KSTRTOX) += test-kstrtox.o
diff --git a/lib/dma-debug.c b/lib/dma-debug.c
index db07bfd9298e..79700fa2dfc4 100644
--- a/lib/dma-debug.c
+++ b/lib/dma-debug.c
@@ -62,6 +62,8 @@ struct dma_debug_entry {
#endif
};
+typedef bool (*match_fn)(struct dma_debug_entry *, struct dma_debug_entry *);
+
struct hash_bucket {
struct list_head list;
spinlock_t lock;
@@ -240,18 +242,37 @@ static void put_hash_bucket(struct hash_bucket *bucket,
spin_unlock_irqrestore(&bucket->lock, __flags);
}
+static bool exact_match(struct dma_debug_entry *a, struct dma_debug_entry *b)
+{
+ return ((a->dev_addr == a->dev_addr) &&
+ (a->dev == b->dev)) ? true : false;
+}
+
+static bool containing_match(struct dma_debug_entry *a,
+ struct dma_debug_entry *b)
+{
+ if (a->dev != b->dev)
+ return false;
+
+ if ((b->dev_addr <= a->dev_addr) &&
+ ((b->dev_addr + b->size) >= (a->dev_addr + a->size)))
+ return true;
+
+ return false;
+}
+
/*
* Search a given entry in the hash bucket list
*/
-static struct dma_debug_entry *hash_bucket_find(struct hash_bucket *bucket,
- struct dma_debug_entry *ref)
+static struct dma_debug_entry *__hash_bucket_find(struct hash_bucket *bucket,
+ struct dma_debug_entry *ref,
+ match_fn match)
{
struct dma_debug_entry *entry, *ret = NULL;
int matches = 0, match_lvl, last_lvl = 0;
list_for_each_entry(entry, &bucket->list, list) {
- if ((entry->dev_addr != ref->dev_addr) ||
- (entry->dev != ref->dev))
+ if (!match(ref, entry))
continue;
/*
@@ -293,6 +314,39 @@ static struct dma_debug_entry *hash_bucket_find(struct hash_bucket *bucket,
return ret;
}
+static struct dma_debug_entry *bucket_find_exact(struct hash_bucket *bucket,
+ struct dma_debug_entry *ref)
+{
+ return __hash_bucket_find(bucket, ref, exact_match);
+}
+
+static struct dma_debug_entry *bucket_find_contain(struct hash_bucket **bucket,
+ struct dma_debug_entry *ref,
+ unsigned long *flags)
+{
+
+ unsigned int max_range = dma_get_max_seg_size(ref->dev);
+ struct dma_debug_entry *entry, index = *ref;
+ unsigned int range = 0;
+
+ while (range <= max_range) {
+ entry = __hash_bucket_find(*bucket, &index, containing_match);
+
+ if (entry)
+ return entry;
+
+ /*
+ * Nothing found, go back a hash bucket
+ */
+ put_hash_bucket(*bucket, flags);
+ range += (1 << HASH_FN_SHIFT);
+ index.dev_addr -= (1 << HASH_FN_SHIFT);
+ *bucket = get_hash_bucket(&index, flags);
+ }
+
+ return NULL;
+}
+
/*
* Add an entry to a hash bucket
*/
@@ -802,7 +856,7 @@ static void check_unmap(struct dma_debug_entry *ref)
}
bucket = get_hash_bucket(ref, &flags);
- entry = hash_bucket_find(bucket, ref);
+ entry = bucket_find_exact(bucket, ref);
if (!entry) {
err_printk(ref->dev, NULL, "DMA-API: device driver tries "
@@ -902,7 +956,7 @@ static void check_sync(struct device *dev,
bucket = get_hash_bucket(ref, &flags);
- entry = hash_bucket_find(bucket, ref);
+ entry = bucket_find_contain(&bucket, ref, &flags);
if (!entry) {
err_printk(dev, NULL, "DMA-API: device driver tries "
@@ -1060,7 +1114,7 @@ static int get_nr_mapped_entries(struct device *dev,
int mapped_ents;
bucket = get_hash_bucket(ref, &flags);
- entry = hash_bucket_find(bucket, ref);
+ entry = bucket_find_exact(bucket, ref);
mapped_ents = 0;
if (entry)
diff --git a/lib/sha1.c b/lib/sha1.c
index f33271dd00cb..1de509a159c8 100644
--- a/lib/sha1.c
+++ b/lib/sha1.c
@@ -8,6 +8,7 @@
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/bitops.h>
+#include <linux/cryptohash.h>
#include <asm/unaligned.h>
/*
diff --git a/lib/xz/xz_dec_bcj.c b/lib/xz/xz_dec_bcj.c
index e51e2558ca9d..a768e6d28bbb 100644
--- a/lib/xz/xz_dec_bcj.c
+++ b/lib/xz/xz_dec_bcj.c
@@ -441,8 +441,12 @@ XZ_EXTERN enum xz_ret xz_dec_bcj_run(struct xz_dec_bcj *s,
* next filter in the chain. Apply the BCJ filter on the new data
* in the output buffer. If everything cannot be filtered, copy it
* to temp and rewind the output buffer position accordingly.
+ *
+ * This needs to be always run when temp.size == 0 to handle a special
+ * case where the output buffer is full and the next filter has no
+ * more output coming but hasn't returned XZ_STREAM_END yet.
*/
- if (s->temp.size < b->out_size - b->out_pos) {
+ if (s->temp.size < b->out_size - b->out_pos || s->temp.size == 0) {
out_start = b->out_pos;
memcpy(b->out + b->out_pos, s->temp.buf, s->temp.size);
b->out_pos += s->temp.size;
@@ -465,16 +469,25 @@ XZ_EXTERN enum xz_ret xz_dec_bcj_run(struct xz_dec_bcj *s,
s->temp.size = b->out_pos - out_start;
b->out_pos -= s->temp.size;
memcpy(s->temp.buf, b->out + b->out_pos, s->temp.size);
+
+ /*
+ * If there wasn't enough input to the next filter to fill
+ * the output buffer with unfiltered data, there's no point
+ * to try decoding more data to temp.
+ */
+ if (b->out_pos + s->temp.size < b->out_size)
+ return XZ_OK;
}
/*
- * If we have unfiltered data in temp, try to fill by decoding more
- * data from the next filter. Apply the BCJ filter on temp. Then we
- * hopefully can fill the actual output buffer by copying filtered
- * data from temp. A mix of filtered and unfiltered data may be left
- * in temp; it will be taken care on the next call to this function.
+ * We have unfiltered data in temp. If the output buffer isn't full
+ * yet, try to fill the temp buffer by decoding more data from the
+ * next filter. Apply the BCJ filter on temp. Then we hopefully can
+ * fill the actual output buffer by copying filtered data from temp.
+ * A mix of filtered and unfiltered data may be left in temp; it will
+ * be taken care on the next call to this function.
*/
- if (s->temp.size > 0) {
+ if (b->out_pos < b->out_size) {
/* Make b->out{,_pos,_size} temporarily point to s->temp. */
s->out = b->out;
s->out_pos = b->out_pos;
generated by cgit v1.2.3 (git 2.0.4) at 2024-11-13 22:33:27 +0000