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AP_Radio: prevent crash if cc2500 device not found

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This commit is contained in:
Andrew Tridgell 2018-01-19 16:07:17 +11:00
parent 9f53ae1ea4
commit 907728e323
1 changed files with 1 additions and 1 deletions
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2
libraries/AP_Radio/driver_cc2500.h
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@ -155,7 +155,7 @@ public:
bool Reset(void);
bool lock_bus(void) {
return dev->get_semaphore()->take(HAL_SEMAPHORE_BLOCK_FOREVER);
return dev && dev->get_semaphore()->take(HAL_SEMAPHORE_BLOCK_FOREVER);
}
void unlock_bus(void) {
dev->get_semaphore()->give();