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| author | Evgeniy Polyakov <johnpol@2ka.mipt.ru> | 2008-12-23 13:57:12 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-12-23 15:58:21 -0800 |
| commit | f00a189257836e5237ace3265f6991ef66a16c86 (patch) | |
| tree | 36578b6efa3dafa6487a513fb7b6b00071a1bb62 /drivers/w1/w1_io.c | |
| parent | cc6c2ca30074a0274c05dd3212c741a550f0d3c2 (diff) | |
| download | lwn-f00a189257836e5237ace3265f6991ef66a16c86.tar.gz lwn-f00a189257836e5237ace3265f6991ef66a16c86.zip | |
w1: fix slave selection on big-endian systems
During test of the w1-gpio driver i found that in "w1.c:679
w1_slave_found()" the device id is converted to little-endian with
"cpu_to_le64()", but its not converted back to cpu format in "w1_io.c:293
w1_reset_select_slave()".
Based on a patch created by Andreas Hummel.
[akpm@linux-foundation.org: remove unneeded cast]
Reported-by: Andreas Hummel <andi_hummel@gmx.de>
Signed-off-by: Evgeniy Polyakov <zbr@ioremap.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/w1/w1_io.c')
| -rw-r--r-- | drivers/w1/w1_io.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/w1/w1_io.c b/drivers/w1/w1_io.c index 0d15b0eaf79a..5139c25ca962 100644 --- a/drivers/w1/w1_io.c +++ b/drivers/w1/w1_io.c @@ -356,7 +356,9 @@ int w1_reset_select_slave(struct w1_slave *sl) w1_write_8(sl->master, W1_SKIP_ROM); else { u8 match[9] = {W1_MATCH_ROM, }; - memcpy(&match[1], (u8 *)&sl->reg_num, 8); + u64 rn = le64_to_cpu(*((u64*)&sl->reg_num)); + + memcpy(&match[1], &rn, 8); w1_write_block(sl->master, match, 9); } return 0; |