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| author |   Eliad Peller <eliad@wizery.com> | 2014-06-17 13:07:02 +0300 |
|---|---|---|
| committer |   Johannes Berg <johannes.berg@intel.com> | 2014-06-23 11:29:25 +0200 |
| commit | 0ce12026d6ea4a24d52ddcde36b9643f2e26d560 (patch) | |
| tree | b245ae02e5719e1811ee39749c03c6ce5770f010 /net/wireless/core.h | |
| parent | Revert "cfg80211: Use 5MHz bandwidth by default when checking usable channels" (diff) | |
| download | linux-dev-0ce12026d6ea4a24d52ddcde36b9643f2e26d560.tar.xz linux-dev-0ce12026d6ea4a24d52ddcde36b9643f2e26d560.zip | |
cfg80211: fix elapsed_jiffies calculation
MAX_JIFFY_OFFSET has no meaning when calculating the
elapsed jiffies, as jiffies run out until ULONG_MAX.
This miscalculation results in erroneous values
in case of a wrap-around.
Signed-off-by: Eliad Peller <eliad@wizery.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net/wireless/core.h')
| -rw-r--r-- | net/wireless/core.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/wireless/core.h b/net/wireless/core.h index e9afbf10e756..7e3a3cef7df9 100644 --- a/net/wireless/core.h +++ b/net/wireless/core.h @@ -424,7 +424,7 @@ static inline unsigned int elapsed_jiffies_msecs(unsigned long start) if (end >= start) return jiffies_to_msecs(end - start); - return jiffies_to_msecs(end + (MAX_JIFFY_OFFSET - start) + 1); + return jiffies_to_msecs(end + (ULONG_MAX - start) + 1); } void |