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| author | Alan Stern <[email protected]> | 2012-01-24 18:34:24 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <[email protected]> | 2012-01-25 00:00:34 +0000 |
| commit | fde25a9b63b9a3dc91365c394a426ebe64cfc2da (patch) | |
| tree | ecc24bd2702cb7cb32cd4d22729541d5c79cee39 /lib/dma-debug.c | |
| parent | driver-core: Fix possible null reference in subsys_interface_unregister (diff) | |
| download | kernel-fde25a9b63b9a3dc91365c394a426ebe64cfc2da.tar.gz kernel-fde25a9b63b9a3dc91365c394a426ebe64cfc2da.zip | |
Driver core: driver_find() drops reference before returning
As part of the removal of get_driver()/put_driver(), this patch
(as1510) changes driver_find(); it now drops the reference it acquires
before returning. The patch also adjusts all the callers of
driver_find() to remove the now unnecessary calls to put_driver().
In addition, the patch adds a warning to driver_find(): Callers must
make sure the driver they are searching for does not get unloaded
while they are using it. This has always been the case; driver_find()
has never prevented a driver from being unregistered or unloaded.
Hence the patch will not introduce any new bugs. The existing callers
all seem to be okay in this respect, however I don't understand the
video drivers well enough to be certain about them.
Signed-off-by: Alan Stern <[email protected]>
CC: Dmitry Torokhov <[email protected]>
CC: Kyungmin Park <[email protected]>
CC: Andy Walls <[email protected]>
CC: Martin Schwidefsky <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
Diffstat (limited to 'lib/dma-debug.c')
0 files changed, 0 insertions, 0 deletions