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authorIoana Ciornei <ioana.ciornei@nxp.com>2021-02-26 17:30:20 +0200
committerJakub Kicinski <kuba@kernel.org>2021-03-01 11:46:55 -0800
commit73f476aa1975bae6a792b340f5b26ffcfba869a6 (patch)
tree32a9a807fe43d1c883d92b7e678f737103e9d2a8 /drivers/net/phy/dp83822.c
parent447621e373bd1b22300445639b43c39f399e4c73 (diff)
downloadlinux-73f476aa1975bae6a792b340f5b26ffcfba869a6.tar.gz
net: phy: ti: take into account all possible interrupt sources
The previous implementation of .handle_interrupt() did not take into account the fact that all the interrupt status registers should be acknowledged since multiple interrupt sources could be asserted. Fix this by reading all the status registers before exiting with IRQ_NONE or triggering the PHY state machine. Fixes: 1d1ae3c6ca3f ("net: phy: ti: implement generic .handle_interrupt() callback") Reported-by: Sven Schuchmann <schuchmann@schleissheimer.de> Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com> Link: https://lore.kernel.org/r/20210226153020.867852-1-ciorneiioana@gmail.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'drivers/net/phy/dp83822.c')
-rw-r--r--drivers/net/phy/dp83822.c9
1 files changed, 5 insertions, 4 deletions
diff --git a/drivers/net/phy/dp83822.c b/drivers/net/phy/dp83822.c
index be1224b4447b..f7a2ec150e54 100644
--- a/drivers/net/phy/dp83822.c
+++ b/drivers/net/phy/dp83822.c
@@ -290,6 +290,7 @@ static int dp83822_config_intr(struct phy_device *phydev)
static irqreturn_t dp83822_handle_interrupt(struct phy_device *phydev)
{
+ bool trigger_machine = false;
int irq_status;
/* The MISR1 and MISR2 registers are holding the interrupt status in
@@ -305,7 +306,7 @@ static irqreturn_t dp83822_handle_interrupt(struct phy_device *phydev)
return IRQ_NONE;
}
if (irq_status & ((irq_status & GENMASK(7, 0)) << 8))
- goto trigger_machine;
+ trigger_machine = true;
irq_status = phy_read(phydev, MII_DP83822_MISR2);
if (irq_status < 0) {
@@ -313,11 +314,11 @@ static irqreturn_t dp83822_handle_interrupt(struct phy_device *phydev)
return IRQ_NONE;
}
if (irq_status & ((irq_status & GENMASK(7, 0)) << 8))
- goto trigger_machine;
+ trigger_machine = true;
- return IRQ_NONE;
+ if (!trigger_machine)
+ return IRQ_NONE;
-trigger_machine:
phy_trigger_machine(phydev);
return IRQ_HANDLED;