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| author | Anton Vorontsov <cbouatmailru@gmail.com> | 2012-01-04 09:09:35 +0400 |
|---|---|---|
| committer | Anton Vorontsov <cbouatmailru@gmail.com> | 2012-01-04 09:09:35 +0400 |
| commit | 251f39fe42dae863bd24e30864e6b66076ba076d (patch) | |
| tree | c804944bc17f3836d19cc8b5bc611dd1fb0ea915 /drivers/w1/w1_io.c | |
| parent | 9b8872273af6983b246252a6508fa7cf34c69d6e (diff) | |
| parent | 35b4c01e29bdd9632dabf9784ed3486333f00427 (diff) | |
| download | linux-251f39fe42dae863bd24e30864e6b66076ba076d.tar.xz | |
Merge branch 'power-supply-scope' of git://git.kernel.org/pub/scm/linux/kernel/git/jeremy/xen
Diffstat (limited to 'drivers/w1/w1_io.c')
| -rw-r--r-- | drivers/w1/w1_io.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/w1/w1_io.c b/drivers/w1/w1_io.c index 765b37b62a4f..3135b2c63998 100644 --- a/drivers/w1/w1_io.c +++ b/drivers/w1/w1_io.c @@ -158,13 +158,18 @@ EXPORT_SYMBOL_GPL(w1_write_8); static u8 w1_read_bit(struct w1_master *dev) { int result; + unsigned long flags; + /* sample timing is critical here */ + local_irq_save(flags); dev->bus_master->write_bit(dev->bus_master->data, 0); w1_delay(6); dev->bus_master->write_bit(dev->bus_master->data, 1); w1_delay(9); result = dev->bus_master->read_bit(dev->bus_master->data); + local_irq_restore(flags); + w1_delay(55); return result & 0x1; |