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| author | Kiran K <kiran.k@intel.com> | 2025-01-31 18:30:19 +0530 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-02-21 14:01:18 +0100 |
| commit | a700e50fcf960c2a96bd31a4ba61d7bb3dac2c3d (patch) | |
| tree | ccaf32401a59aa9c836abc807fdfbcf69998647f /kernel/workqueue.c | |
| parent | 390bf69dcb2056a16506111b4f46b04145280a12 (diff) | |
| download | linux-a700e50fcf960c2a96bd31a4ba61d7bb3dac2c3d.tar.gz linux-a700e50fcf960c2a96bd31a4ba61d7bb3dac2c3d.tar.bz2 linux-a700e50fcf960c2a96bd31a4ba61d7bb3dac2c3d.zip | |
Bluetooth: btintel_pcie: Fix a potential race condition
[ Upstream commit 872274b992839ff64fe560767fe7ee5f942ccdb1 ]
On HCI_OP_RESET command, firmware raises alive interrupt. Driver needs
to wait for this before sending other command. This patch fixes the potential
miss of alive interrupt due to which HCI_OP_RESET can timeout.
Expected flow:
If tx command is HCI_OP_RESET,
1. set data->gp0_received = false
2. send HCI_OP_RESET
3. wait for alive interrupt
Actual flow having potential race:
If tx command is HCI_OP_RESET,
1. send HCI_OP_RESET
1a. Firmware raises alive interrupt here and in ISR
data->gp0_received is set to true
2. set data->gp0_received = false
3. wait for alive interrupt
Signed-off-by: Kiran K <kiran.k@intel.com>
Fixes: 05c200c8f029 ("Bluetooth: btintel_pcie: Add handshake between driver and firmware")
Reported-by: Bjorn Helgaas <helgaas@kernel.org>
Closes: https://patchwork.kernel.org/project/bluetooth/patch/20241001104451.626964-1-kiran.k@intel.com/
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'kernel/workqueue.c')
0 files changed, 0 insertions, 0 deletions