From a9fe964e7aaeb3fc06a91c21269d0ac8b5afcea8 Mon Sep 17 00:00:00 2001 From: "Russell King (Oracle)" Date: Wed, 17 May 2023 11:37:57 +0100 Subject: [PATCH] net: sfp: swap order of rtnl and st_mutex locks Swap the order of the rtnl and st_mutex locks - st_mutex is now nested beneath rtnl lock instead of rtnl being beneath st_mutex. This will allow us to hold st_mutex only while manipulating the module's hardware or software control state. Reviewed-by: Simon Horman Signed-off-by: Russell King (Oracle) Signed-off-by: Jakub Kicinski --- drivers/net/phy/sfp.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/net/phy/sfp.c b/drivers/net/phy/sfp.c index 3fc703e4dd21..ffb6c37dac96 100644 --- a/drivers/net/phy/sfp.c +++ b/drivers/net/phy/sfp.c @@ -2600,8 +2600,8 @@ static void sfp_check_state(struct sfp *sfp) { unsigned int state, i, changed; - mutex_lock(&sfp->st_mutex); rtnl_lock(); + mutex_lock(&sfp->st_mutex); state = sfp_get_state(sfp); changed = state ^ sfp->state; if (sfp->tx_fault_ignore) @@ -2628,8 +2628,8 @@ static void sfp_check_state(struct sfp *sfp) if (changed & SFP_F_LOS) sfp_sm_event(sfp, state & SFP_F_LOS ? SFP_E_LOS_HIGH : SFP_E_LOS_LOW); - rtnl_unlock(); mutex_unlock(&sfp->st_mutex); + rtnl_unlock(); } static irqreturn_t sfp_irq(int irq, void *data) -- 2.11.0