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| author | Uwe Kleine-König <[email protected]> | 2021-10-13 15:37:10 +0200 |
|---|---|---|
| committer | Mark Brown <[email protected]> | 2021-10-14 13:32:19 +0100 |
| commit | 16a8e2fbb2d49111004efc1c7342e083eafabeb0 (patch) | |
| tree | ec9c22b3f88095ffa7e4885b9dfa7ba5ced1ab06 /scripts/gcc-plugins/cyc_complexity_plugin.c | |
| parent | 6098475d4cb48d821bdf453c61118c56e26294f0 (diff) | |
spi-mux: Fix false-positive lockdep splats
io_mutex is taken by spi_setup() and spi-mux's .setup() callback calls
spi_setup() which results in a nested lock of io_mutex.
add_lock is taken by spi_add_device(). The device_add() call in there
can result in calling spi-mux's .probe() callback which registers its
own spi controller which in turn results in spi_add_device() being
called again.
To fix this initialize the controller's locks already in
spi_alloc_controller() to give spi_mux_probe() a chance to set the
lockdep subclass.
Signed-off-by: Uwe Kleine-König <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Mark Brown <[email protected]>
Diffstat (limited to 'scripts/gcc-plugins/cyc_complexity_plugin.c')
0 files changed, 0 insertions, 0 deletions