6.17-stable review patch. If anyone has any objections, please let me know.
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From: Dharma Balasubiramani dharma.b@microchip.com
commit 109ff654934a4752f8875ded672efd1fbfe4d31d upstream.
Mark the interrupt as IRQF_SHARED to permit multiple counter channels to share the same TCB IRQ line.
Each Timer/Counter Block (TCB) instance shares a single IRQ line among its three internal channels. When multiple counter channels (e.g., counter@0 and counter@1) within the same TCB are enabled, the second call to devm_request_irq() fails because the IRQ line is already requested by the first channel.
Cc: stable@vger.kernel.org Fixes: e5d581396821 ("counter: microchip-tcb-capture: Add IRQ handling") Signed-off-by: Dharma Balasubiramani dharma.b@microchip.com Reviewed-by: Kamel Bouhara kamel.bouhara@bootlin.com Reviewed-by: Bence Csókás bence98@sch.bme.hu Link: https://lore.kernel.org/r/20251006-microchip-tcb-v1-1-09c19181bb4a@microchip... Signed-off-by: William Breathitt Gray wbg@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/counter/microchip-tcb-capture.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/counter/microchip-tcb-capture.c b/drivers/counter/microchip-tcb-capture.c index 1a299d1f350b..19d457ae4c3b 100644 --- a/drivers/counter/microchip-tcb-capture.c +++ b/drivers/counter/microchip-tcb-capture.c @@ -451,7 +451,7 @@ static void mchp_tc_irq_remove(void *ptr) static int mchp_tc_irq_enable(struct counter_device *const counter, int irq) { struct mchp_tc_data *const priv = counter_priv(counter); - int ret = devm_request_irq(counter->parent, irq, mchp_tc_isr, 0, + int ret = devm_request_irq(counter->parent, irq, mchp_tc_isr, IRQF_SHARED, dev_name(counter->parent), counter);
if (ret < 0)