[PATCH AUTOSEL 5.13 036/189] pinctrl: equilibrium: Add missing MODULE_DEVICE_TABLE

[PATCH AUTOSEL 5.13 036/189] pinctrl: equilibrium: Add missing MODULE_DEVICE_TABLE

[Sasha Levin]

From: Bixuan Cui <cuibixuan@huawei.com>

[ Upstream commit d7f444499d6faf9a6ae3b27ec094109528d2b9a7 ]

This patch adds missing MODULE_DEVICE_TABLE definition which generates
correct modalias for automatic loading of this driver when it is built
as an external module.

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Bixuan Cui <cuibixuan@huawei.com>
Link: https://lore.kernel.org/r/20210508031502.53637-1-cuibixuan@huawei.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/pinctrl/pinctrl-equilibrium.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/pinctrl/pinctrl-equilibrium.c b/drivers/pinctrl/pinctrl-equilibrium.c
index a194d8089b6f..38cc20fa9d5a 100644
--- a/drivers/pinctrl/pinctrl-equilibrium.c
+++ b/drivers/pinctrl/pinctrl-equilibrium.c
@@ -939,6 +939,7 @@ static const struct of_device_id eqbr_pinctrl_dt_match[] = {
 	{ .compatible = "intel,lgm-io" },
 	{}
 };
+MODULE_DEVICE_TABLE(of, eqbr_pinctrl_dt_match);
 
 static struct platform_driver eqbr_pinctrl_driver = {
 	.probe	= eqbr_pinctrl_probe,
-- 
2.30.2

[PATCH AUTOSEL 5.13 079/189] pinctrl: mcp23s08: fix race condition in irq handler

[Sasha Levin]

From: Radim Pavlik <radim.pavlik@tbs-biometrics.com>

[ Upstream commit 897120d41e7afd9da435cb00041a142aeeb53c07 ]

Checking value of MCP_INTF in mcp23s08_irq suggests that the handler may be
called even when there is no interrupt pending.

But the actual interrupt could happened between reading MCP_INTF and MCP_GPIO.
In this situation we got nothing from MCP_INTF, but the event gets acknowledged
on the expander by reading MCP_GPIO. This leads to losing events.

Fix the problem by not reading any register until we see something in MCP_INTF.

The error was reproduced and fix tested on MCP23017.

Signed-off-by: Radim Pavlik <radim.pavlik@tbs-biometrics.com>
Link: https://lore.kernel.org/r/AM7PR06MB6769E1183F68DEBB252F665ABA3E9@AM7PR06MB6769.eurprd06.prod.outlook.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/pinctrl/pinctrl-mcp23s08.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/pinctrl/pinctrl-mcp23s08.c b/drivers/pinctrl/pinctrl-mcp23s08.c
index ce2d8014b7e0..799d596a1a4b 100644
--- a/drivers/pinctrl/pinctrl-mcp23s08.c
+++ b/drivers/pinctrl/pinctrl-mcp23s08.c
@@ -351,6 +351,11 @@ static irqreturn_t mcp23s08_irq(int irq, void *data)
 	if (mcp_read(mcp, MCP_INTF, &intf))
 		goto unlock;
 
+	if (intf == 0) {
+		/* There is no interrupt pending */
+		return IRQ_HANDLED;
+	}
+
 	if (mcp_read(mcp, MCP_INTCAP, &intcap))
 		goto unlock;
 
@@ -368,11 +373,6 @@ static irqreturn_t mcp23s08_irq(int irq, void *data)
 	mcp->cached_gpio = gpio;
 	mutex_unlock(&mcp->lock);
 
-	if (intf == 0) {
-		/* There is no interrupt pending */
-		return IRQ_HANDLED;
-	}
-
 	dev_dbg(mcp->chip.parent,
 		"intcap 0x%04X intf 0x%04X gpio_orig 0x%04X gpio 0x%04X\n",
 		intcap, intf, gpio_orig, gpio);
-- 
2.30.2