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usb: fix 'find_next_bit'

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Return correct offset for sizes over machine word size.

Fixes #2013
This commit is contained in:
Sebastian Sumpf 2016-06-16 16:13:25 +02:00 committed by Christian Helmuth
parent 4e9aeb45ea
commit b6bc7e0486
1 changed files with 5 additions and 2 deletions
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7
repos/dde_linux/src/lib/usb/lx_emul.cc
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@ -426,14 +426,16 @@ unsigned long find_next_bit(const unsigned long *addr, unsigned long size,
for (; offset < size; offset++) for (; offset < size; offset++)
if (addr[i] & (1UL << offset)) if (addr[i] & (1UL << offset))
return offset; return offset + (i * BITS_PER_LONG);
return size; return size;
} }
long find_next_zero_bit_le(const void *addr, long find_next_zero_bit_le(const void *addr,
unsigned long size, unsigned long offset) unsigned long size, unsigned long offset)
{ {
static unsigned cnt = 0;
unsigned long max_size = sizeof(long) * 8; unsigned long max_size = sizeof(long) * 8;
if (offset >= max_size) { if (offset >= max_size) {
PWRN("Offset greater max size"); PWRN("Offset greater max size");
@ -444,7 +446,8 @@ long find_next_zero_bit_le(const void *addr,
if (!(*(unsigned long*)addr & (1L << offset))) if (!(*(unsigned long*)addr & (1L << offset)))
return offset; return offset;
PERR("No zero bit findable"); lx_log(DEBUG_TRACE, "No zero bit findable %u", cnt++);
return offset + size; return offset + size;
} }