diff options
| author |   Andy Shevchenko <andriy.shevchenko@linux.intel.com> | 2020-03-24 14:20:22 +0200 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-03-24 13:33:25 +0100 |
| commit | 927f82875c272e8c1159cb2c00bda473402c7c28 (patch) | |
| tree | 4fa8afaef32dfaf40c2ffd70baf1f201d8df0c6a /drivers/base/dd.c | |
| parent | libfs: fix infoleak in simple_attr_read() (diff) | |
| download | linux-dev-927f82875c272e8c1159cb2c00bda473402c7c28.tar.xz linux-dev-927f82875c272e8c1159cb2c00bda473402c7c28.zip | |
driver core: Read atomic counter once in driver_probe_done()
Between printing the debug message and actual check atomic counter can be
altered. For better debugging experience read atomic counter value only once.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Tested-by: Ferry Toth <fntoth@gmail.com>
Link: https://lore.kernel.org/r/20200324122023.9649-2-andriy.shevchenko@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/base/dd.c')
| -rw-r--r-- | drivers/base/dd.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/drivers/base/dd.c b/drivers/base/dd.c index 76888a7459d8..3f5b8bdd94f0 100644 --- a/drivers/base/dd.c +++ b/drivers/base/dd.c @@ -644,9 +644,10 @@ static int really_probe_debug(struct device *dev, struct device_driver *drv) */ int driver_probe_done(void) { - pr_debug("%s: probe_count = %d\n", __func__, - atomic_read(&probe_count)); - if (atomic_read(&probe_count)) + int local_probe_count = atomic_read(&probe_count); + + pr_debug("%s: probe_count = %d\n", __func__, local_probe_count); + if (local_probe_count) return -EBUSY; return 0; } |