Messages in this thread Patch in this message | | | From | Sasha Levin <> | Subject | [PATCH AUTOSEL 5.13 09/29] mfd: Don't use irq_create_mapping() to resolve a mapping | Date | Sat, 11 Sep 2021 09:12:13 -0400 |
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From: Marc Zyngier <maz@kernel.org>
[ Upstream commit 9ff80e2de36d0554e3a6da18a171719fe8663c17 ]
Although irq_create_mapping() is able to deal with duplicate mappings, it really isn't supposed to be a substitute for irq_find_mapping(), and can result in allocations that take place in atomic context if the mapping didn't exist.
Fix the handful of MFD drivers that use irq_create_mapping() in interrupt context by using irq_find_mapping() instead.
Cc: Linus Walleij <linus.walleij@linaro.org> Cc: Lee Jones <lee.jones@linaro.org> Cc: Maxime Coquelin <mcoquelin.stm32@gmail.com> Cc: Alexandre Torgue <alexandre.torgue@foss.st.com> Signed-off-by: Marc Zyngier <maz@kernel.org> Signed-off-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Sasha Levin <sashal@kernel.org> --- drivers/mfd/ab8500-core.c | 2 +- drivers/mfd/stmpe.c | 4 ++-- drivers/mfd/tc3589x.c | 2 +- drivers/mfd/wm8994-irq.c | 2 +- 4 files changed, 5 insertions(+), 5 deletions(-)
diff --git a/drivers/mfd/ab8500-core.c b/drivers/mfd/ab8500-core.c index c2ba498ad302..ee030b09a2ad 100644 --- a/drivers/mfd/ab8500-core.c +++ b/drivers/mfd/ab8500-core.c @@ -485,7 +485,7 @@ static int ab8500_handle_hierarchical_line(struct ab8500 *ab8500, if (line == AB8540_INT_GPIO43F || line == AB8540_INT_GPIO44F) line += 1; - handle_nested_irq(irq_create_mapping(ab8500->domain, line)); + handle_nested_irq(irq_find_mapping(ab8500->domain, line)); } return 0; diff --git a/drivers/mfd/stmpe.c b/drivers/mfd/stmpe.c index 1dd39483e7c1..58d09c615e67 100644 --- a/drivers/mfd/stmpe.c +++ b/drivers/mfd/stmpe.c @@ -1095,7 +1095,7 @@ static irqreturn_t stmpe_irq(int irq, void *data) if (variant->id_val == STMPE801_ID || variant->id_val == STMPE1600_ID) { - int base = irq_create_mapping(stmpe->domain, 0); + int base = irq_find_mapping(stmpe->domain, 0); handle_nested_irq(base); return IRQ_HANDLED; @@ -1123,7 +1123,7 @@ static irqreturn_t stmpe_irq(int irq, void *data) while (status) { int bit = __ffs(status); int line = bank * 8 + bit; - int nestedirq = irq_create_mapping(stmpe->domain, line); + int nestedirq = irq_find_mapping(stmpe->domain, line); handle_nested_irq(nestedirq); status &= ~(1 << bit); diff --git a/drivers/mfd/tc3589x.c b/drivers/mfd/tc3589x.c index 7614f8fe0e91..13583cdb93b6 100644 --- a/drivers/mfd/tc3589x.c +++ b/drivers/mfd/tc3589x.c @@ -187,7 +187,7 @@ static irqreturn_t tc3589x_irq(int irq, void *data) while (status) { int bit = __ffs(status); - int virq = irq_create_mapping(tc3589x->domain, bit); + int virq = irq_find_mapping(tc3589x->domain, bit); handle_nested_irq(virq); status &= ~(1 << bit); diff --git a/drivers/mfd/wm8994-irq.c b/drivers/mfd/wm8994-irq.c index 6c3a619e2628..651a028bc519 100644 --- a/drivers/mfd/wm8994-irq.c +++ b/drivers/mfd/wm8994-irq.c @@ -154,7 +154,7 @@ static irqreturn_t wm8994_edge_irq(int irq, void *data) struct wm8994 *wm8994 = data; while (gpio_get_value_cansleep(wm8994->pdata.irq_gpio)) - handle_nested_irq(irq_create_mapping(wm8994->edge_irq, 0)); + handle_nested_irq(irq_find_mapping(wm8994->edge_irq, 0)); return IRQ_HANDLED; } -- 2.30.2
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