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| author | Bernhard Walle <bernhard@bwalle.de> | 2012-02-19 18:28:01 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-02-24 14:16:43 -0800 |
| commit | 3734f7858f4334d51c1cd77deff3e1e66517e261 (patch) | |
| tree | a7cecf353c948546e792c636f3e761ed9c6ffb4a /drivers/misc/bmp085.c | |
| parent | ef77d83fd7a2f37a20d9e37ac156f18e7e105c75 (diff) | |
| download | lwn-3734f7858f4334d51c1cd77deff3e1e66517e261.tar.gz lwn-3734f7858f4334d51c1cd77deff3e1e66517e261.zip | |
misc: bmp085: Handle jiffies overflow correctly
By using the time_is_before_jiffies() macro instead of normal
arithmetic, the jiffies overflow is handled correctly.
Signed-off-by: Bernhard Walle <bernhard@bwalle.de>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/misc/bmp085.c')
| -rw-r--r-- | drivers/misc/bmp085.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/misc/bmp085.c b/drivers/misc/bmp085.c index 3c534aba6272..b088abc0f45b 100644 --- a/drivers/misc/bmp085.c +++ b/drivers/misc/bmp085.c @@ -234,7 +234,8 @@ static s32 bmp085_get_pressure(struct bmp085_data *data, int *pressure) int status; /* alt least every second force an update of the ambient temperature */ - if (data->last_temp_measurement + 1*HZ < jiffies) { + if (data->last_temp_measurement == 0 || + time_is_before_jiffies(data->last_temp_measurement + 1*HZ)) { status = bmp085_get_temperature(data, NULL); if (status != 0) goto exit; |