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firmware: arm_ffa: Ensure drivers provide a probe function
The bus probe callback calls the driver callback without further
checking. Better be safe than sorry and refuse registration of a driver
without a probe function to prevent a NULL pointer exception.
Link: https://lore.kernel.org/r/20210621201652.127611-1-u.kleine-koenig@pengutronix.de
Fixes: e781858488
("firmware: arm_ffa: Add initial FFA bus support for device enumeration")
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
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@ -99,6 +99,9 @@ int ffa_driver_register(struct ffa_driver *driver, struct module *owner,
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{
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{
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int ret;
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int ret;
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if (!driver->probe)
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return -EINVAL;
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driver->driver.bus = &ffa_bus_type;
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driver->driver.bus = &ffa_bus_type;
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driver->driver.name = driver->name;
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driver->driver.name = driver->name;
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driver->driver.owner = owner;
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driver->driver.owner = owner;
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