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Bluetooth: btmtksdio: Prevent enabling interrupts after IRQ handler removal

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[ Upstream commit 6ac4233afb9a389a7629b7f812395d1d1eca5a83 ]

Ensure interrupts are not re-enabled when the IRQ handler has already been
removed. This prevents unexpected IRQ handler execution due to stale or
unhandled interrupts.

Modify btmtksdio_txrx_work to check if bdev->func->irq_handler exists
before calling sdio_writel to enable interrupts.

Co-developed-by: Pedro Tsai <pedro.tsai@mediatek.com>
Signed-off-by: Pedro Tsai <pedro.tsai@mediatek.com>
Co-developed-by: Felix Freimann <felix.freimann@mediatek.com>
Signed-off-by: Felix Freimann <felix.freimann@mediatek.com>
Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Sean Wang
2025-03-11 18:25:22 -07:00
committed by Greg Kroah-Hartman
parent 7cfde2a482
commit 7ec409ee15
1 changed files with 2 additions and 1 deletions
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3
drivers/bluetooth/btmtksdio.c
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@@ -610,7 +610,8 @@ static void btmtksdio_txrx_work(struct work_struct *work)
} while (int_status || time_is_before_jiffies(txrx_timeout));
/* Enable interrupt */
sdio_writel(bdev->func, C_INT_EN_SET, MTK_REG_CHLPCR, NULL);
if (bdev->func->irq_handler)
sdio_writel(bdev->func, C_INT_EN_SET, MTK_REG_CHLPCR, NULL);
sdio_release_host(bdev->func);