From 035546179039d430b32b2cace256552455abf061 Mon Sep 17 00:00:00 2001 From: Laurentiu Tudor Date: Thu, 29 Aug 2019 11:39:45 +0300 Subject: [PATCH] bus: fsl-mc: use raw spin lock to serialize mc cmds Replace the spinlock that serializes the MC commands with a raw spinlock. This is needed for the RT kernel because there are MC commands sent in interrupt context. Signed-off-by: Laurentiu Tudor --- drivers/bus/fsl-mc/mc-io.c | 2 +- drivers/bus/fsl-mc/mc-sys.c | 4 ++-- include/linux/fsl/mc.h | 2 +- 3 files changed, 4 insertions(+), 4 deletions(-) --- a/drivers/bus/fsl-mc/mc-io.c +++ b/drivers/bus/fsl-mc/mc-io.c @@ -82,7 +82,7 @@ int __must_check fsl_create_mc_io(struct mc_io->portal_phys_addr = mc_portal_phys_addr; mc_io->portal_size = mc_portal_size; if (flags & FSL_MC_IO_ATOMIC_CONTEXT_PORTAL) - spin_lock_init(&mc_io->spinlock); + raw_spin_lock_init(&mc_io->spinlock); else mutex_init(&mc_io->mutex); --- a/drivers/bus/fsl-mc/mc-sys.c +++ b/drivers/bus/fsl-mc/mc-sys.c @@ -251,7 +251,7 @@ int mc_send_command(struct fsl_mc_io *mc return -EINVAL; if (mc_io->flags & FSL_MC_IO_ATOMIC_CONTEXT_PORTAL) - spin_lock_irqsave(&mc_io->spinlock, irq_flags); + raw_spin_lock_irqsave(&mc_io->spinlock, irq_flags); else mutex_lock(&mc_io->mutex); @@ -287,7 +287,7 @@ int mc_send_command(struct fsl_mc_io *mc error = 0; common_exit: if (mc_io->flags & FSL_MC_IO_ATOMIC_CONTEXT_PORTAL) - spin_unlock_irqrestore(&mc_io->spinlock, irq_flags); + raw_spin_unlock_irqrestore(&mc_io->spinlock, irq_flags); else mutex_unlock(&mc_io->mutex); --- a/include/linux/fsl/mc.h +++ b/include/linux/fsl/mc.h @@ -340,7 +340,7 @@ struct fsl_mc_io { * This field is only meaningful if the * FSL_MC_IO_ATOMIC_CONTEXT_PORTAL flag is set */ - spinlock_t spinlock; /* serializes mc_send_command() */ + raw_spinlock_t spinlock; /* serializes mc_send_command() */ }; };