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| author | David Fries <david@fries.net> | 2008-10-15 22:04:39 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-10-16 11:21:49 -0700 |
| commit | 0d671b272af9eb06260ab3fd210d454e98dd4216 (patch) | |
| tree | 9a50a3ebb351ff869ce1ba71333b59fa4fc17f48 /drivers/w1/w1.c | |
| parent | c30c9b15187e977ab5928f7276e9dfcd8d6f9460 (diff) | |
| download | linux-0d671b272af9eb06260ab3fd210d454e98dd4216.tar.gz | |
W1: abort search early on on exit
Early abort if the master driver or the hardware goes away in the middle of a bus search operation. The alternative is to spam the print buffer up to 64*64 times with read errors in the case of USB. Signed-off-by: David Fries <david@fries.net> Signed-off-by: Evgeniy Polyakov <johnpol@2ka.mipt.ru> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/w1/w1.c')
| -rw-r--r-- | drivers/w1/w1.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/w1/w1.c b/drivers/w1/w1.c index 25640f681729..aac03f151fe0 100644 --- a/drivers/w1/w1.c +++ b/drivers/w1/w1.c @@ -772,6 +772,11 @@ void w1_search(struct w1_master *dev, u8 search_type, w1_slave_found_callback cb /* extract the direction taken & update the device number */ tmp64 = (triplet_ret >> 2); rn |= (tmp64 << i); + + if (test_bit(W1_MASTER_NEED_EXIT, &dev->flags)) { + printk(KERN_INFO "Abort w1_search (exiting)\n"); + return; + } } if ( (triplet_ret & 0x03) != 0x03 ) { |