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Code Issues Releases Wiki Activity

Relax memory order to acquire

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This commit is contained in:
clydebarrow
2025-10-30 06:04:33 +10:00
parent d6c23ac056
commit a21057a744
1 changed files with 1 additions and 1 deletions
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esphome/components/usb_host/usb_host_client.cpp
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@@ -348,7 +348,7 @@ TransferRequest *USBClient::get_trq_() {
// Slot i appears available, try to claim it atomically // Slot i appears available, try to claim it atomically
trq_bitmask_t desired = mask | lsb; trq_bitmask_t desired = mask | lsb;
if (this->trq_in_use_.compare_exchange_weak(mask, desired)) { if (this->trq_in_use_.compare_exchange_weak(mask, desired, std::memory_order::acquire)) {
auto i = __builtin_ctz(lsb); // count trailing zeroes auto i = __builtin_ctz(lsb); // count trailing zeroes
// Successfully claimed slot i - prepare the TransferRequest // Successfully claimed slot i - prepare the TransferRequest
auto *trq = &this->requests_[i]; auto *trq = &this->requests_[i];