[PATCH v1] Bluetooth: btintel_pcie: Clear automask on spurious interrupts

[PATCH v1] Bluetooth: btintel_pcie: Clear automask on spurious interrupts

[Kiran K]

On spurious interrupt where the TX and RX causes are not set, driver was
not clearing the auto mask which can block all the interrupts. Driver
needs to clear the automask even if no causes are set.

Signed-off-by: Kiran K <kiran.k@intel.com>
---
 drivers/bluetooth/btintel_pcie.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/bluetooth/btintel_pcie.c b/drivers/bluetooth/btintel_pcie.c
index baa621b3fef9..30923eaabed7 100644
--- a/drivers/bluetooth/btintel_pcie.c
+++ b/drivers/bluetooth/btintel_pcie.c
@@ -2051,6 +2051,9 @@ static irqreturn_t btintel_pcie_irq_msix_handler(int irq, void *dev_id)
 
 	if (unlikely(!(intr_fh | intr_hw))) {
 		/* Ignore interrupt, inta == 0 */
+		bt_warn_ratelimited("Bluetooth: btintel_pcie: Received spurious interrupt\n");
+		btintel_pcie_wr_reg32(data, BTINTEL_PCIE_CSR_MSIX_AUTOMASK_ST,
+				      BIT(entry->entry));
 		return IRQ_NONE;
 	}
 
-- 
2.54.0

Re: [PATCH v1] Bluetooth: btintel_pcie: Clear automask on spurious interrupts

[Luiz Augusto von Dentz]

Hi Kiran,

On Tue, Aug 25, 2026 at 12:06 PM Kiran K <kiran.k@intel.com> wrote:
>
> On spurious interrupt where the TX and RX causes are not set, driver was
> not clearing the auto mask which can block all the interrupts. Driver
> needs to clear the automask even if no causes are set.

Aren't we missing the fixes tag here? This looks like a candidate for
backport, right?

> Signed-off-by: Kiran K <kiran.k@intel.com>
> ---
>  drivers/bluetooth/btintel_pcie.c | 3 +++
>  1 file changed, 3 insertions(+)
>
> diff --git a/drivers/bluetooth/btintel_pcie.c b/drivers/bluetooth/btintel_pcie.c
> index baa621b3fef9..30923eaabed7 100644
> --- a/drivers/bluetooth/btintel_pcie.c
> +++ b/drivers/bluetooth/btintel_pcie.c
> @@ -2051,6 +2051,9 @@ static irqreturn_t btintel_pcie_irq_msix_handler(int irq, void *dev_id)
>
>         if (unlikely(!(intr_fh | intr_hw))) {
>                 /* Ignore interrupt, inta == 0 */
> +               bt_warn_ratelimited("Bluetooth: btintel_pcie: Received spurious interrupt\n");
> +               btintel_pcie_wr_reg32(data, BTINTEL_PCIE_CSR_MSIX_AUTOMASK_ST,
> +                                     BIT(entry->entry));
>                 return IRQ_NONE;
>         }
>
> --
> 2.54.0
>
>


-- 
Luiz Augusto von Dentz

RE: [PATCH v1] Bluetooth: btintel_pcie: Clear automask on spurious interrupts

[K, Kiran]

Hi Luiz,

Thanks for the comments.

>Subject: Re: [PATCH v1] Bluetooth: btintel_pcie: Clear automask on spurious
>interrupts
>
>Hi Kiran,
>
>On Tue, Aug 25, 2026 at 12:06 PM Kiran K <kiran.k@intel.com> wrote:
>>
>> On spurious interrupt where the TX and RX causes are not set, driver was
>> not clearing the auto mask which can block all the interrupts. Driver
>> needs to clear the automask even if no causes are set.
>
>Aren't we missing the fixes tag here? This looks like a candidate for
>backport, right?
Ack. I will add the fixes tag in v2 version of the patch.
>
>> Signed-off-by: Kiran K <kiran.k@intel.com>
>> ---
>>  drivers/bluetooth/btintel_pcie.c | 3 +++
>>  1 file changed, 3 insertions(+)
>>
>> diff --git a/drivers/bluetooth/btintel_pcie.c b/drivers/bluetooth/btintel_pcie.c
>> index baa621b3fef9..30923eaabed7 100644
>> --- a/drivers/bluetooth/btintel_pcie.c
>> +++ b/drivers/bluetooth/btintel_pcie.c
>> @@ -2051,6 +2051,9 @@ static irqreturn_t btintel_pcie_irq_msix_handler(int
>irq, void *dev_id)
>>
>>         if (unlikely(!(intr_fh | intr_hw))) {
>>                 /* Ignore interrupt, inta == 0 */
>> +               bt_warn_ratelimited("Bluetooth: btintel_pcie: Received spurious
>interrupt\n");
>> +               btintel_pcie_wr_reg32(data,
>BTINTEL_PCIE_CSR_MSIX_AUTOMASK_ST,
>> +                                     BIT(entry->entry));
>>                 return IRQ_NONE;
>>         }
>>
>> --
>> 2.54.0
>>
>>
>
>
>--
>Luiz Augusto von Dentz

Regards,
Kiran

RE: [v1] Bluetooth: btintel_pcie: Clear automask on spurious interrupts

[bluez.test.bot]

[-- Attachment #1: Type: text/plain, Size: 1181 bytes --]

This is automated email and please do not reply to this email!

Dear submitter,

Thank you for submitting the patches to the linux bluetooth mailing list.
This is a CI test results with your patch series:
PW Link:https://patchwork.kernel.org/project/bluetooth/list/?series=1151620

---Test result---

Test Summary:
CheckPatch                    PASS      0.69 seconds
VerifyFixes                   PASS      0.13 seconds
VerifySignedoff               PASS      0.13 seconds
GitLint                       PASS      0.32 seconds
SubjectPrefix                 PASS      0.12 seconds
BuildKernel                   PASS      26.01 seconds
CheckAllWarning               PASS      28.15 seconds
CheckSparse                   PASS      26.88 seconds
BuildKernel32                 PASS      24.61 seconds
CheckKernelLLVM               SKIP      0.00 seconds
TestRunnerSetup               PASS      472.27 seconds
IncrementalBuild              PASS      24.34 seconds

Details
##############################
Test: CheckKernelLLVM - SKIP
Desc: Build kernel with LLVM + context analysis
Output:
Clang not found


https://github.com/bluez/bluetooth-next/pull/653

---
Regards,
Linux Bluetooth