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Subject[RFT 3/3] power: supply: ab8500: Handle invalid IRQ from platform_get_irq_byname()
Date
platform_get_irq_byname() might return -errno which later would be
cast to an unsigned int and used in request_irq().

Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>

---

Not marking as cc-stable as this was not reproduced and not tested.
---
drivers/power/supply/ab8500_btemp.c | 5 +++++
drivers/power/supply/ab8500_charger.c | 5 +++++
drivers/power/supply/ab8500_fg.c | 10 ++++++++++
3 files changed, 20 insertions(+)

diff --git a/drivers/power/supply/ab8500_btemp.c b/drivers/power/supply/ab8500_btemp.c
index a167938e32f2..cfd8152bf8fc 100644
--- a/drivers/power/supply/ab8500_btemp.c
+++ b/drivers/power/supply/ab8500_btemp.c
@@ -1082,6 +1082,11 @@ static int ab8500_btemp_probe(struct platform_device *pdev)
/* Register interrupts */
for (i = 0; i < ARRAY_SIZE(ab8500_btemp_irq); i++) {
irq = platform_get_irq_byname(pdev, ab8500_btemp_irq[i].name);
+ if (irq < 0) {
+ ret = irq;
+ goto free_irq;
+ }
+
ret = request_threaded_irq(irq, NULL, ab8500_btemp_irq[i].isr,
IRQF_SHARED | IRQF_NO_SUSPEND,
ab8500_btemp_irq[i].name, di);
diff --git a/drivers/power/supply/ab8500_charger.c b/drivers/power/supply/ab8500_charger.c
index e51d0e72beea..7ad23df6f75a 100644
--- a/drivers/power/supply/ab8500_charger.c
+++ b/drivers/power/supply/ab8500_charger.c
@@ -3556,6 +3556,11 @@ static int ab8500_charger_probe(struct platform_device *pdev)
/* Register interrupts */
for (i = 0; i < ARRAY_SIZE(ab8500_charger_irq); i++) {
irq = platform_get_irq_byname(pdev, ab8500_charger_irq[i].name);
+ if (irq < 0) {
+ ret = irq;
+ goto free_irq;
+ }
+
ret = request_threaded_irq(irq, NULL, ab8500_charger_irq[i].isr,
IRQF_SHARED | IRQF_NO_SUSPEND,
ab8500_charger_irq[i].name, di);
diff --git a/drivers/power/supply/ab8500_fg.c b/drivers/power/supply/ab8500_fg.c
index 7d879589adc2..01f3da103813 100644
--- a/drivers/power/supply/ab8500_fg.c
+++ b/drivers/power/supply/ab8500_fg.c
@@ -3151,6 +3151,11 @@ static int ab8500_fg_probe(struct platform_device *pdev)
/* Register primary interrupt handlers */
for (i = 0; i < ARRAY_SIZE(ab8500_fg_irq_th); i++) {
irq = platform_get_irq_byname(pdev, ab8500_fg_irq_th[i].name);
+ if (irq < 0) {
+ ret = irq;
+ goto free_irq_th;
+ }
+
ret = request_irq(irq, ab8500_fg_irq_th[i].isr,
IRQF_SHARED | IRQF_NO_SUSPEND,
ab8500_fg_irq_th[i].name, di);
@@ -3166,6 +3171,11 @@ static int ab8500_fg_probe(struct platform_device *pdev)

/* Register threaded interrupt handler */
irq = platform_get_irq_byname(pdev, ab8500_fg_irq_bh[0].name);
+ if (irq < 0) {
+ ret = irq;
+ goto free_irq_th;
+ }
+
ret = request_threaded_irq(irq, NULL, ab8500_fg_irq_bh[0].isr,
IRQF_SHARED | IRQF_NO_SUSPEND | IRQF_ONESHOT,
ab8500_fg_irq_bh[0].name, di);
--
2.17.1
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