diff options
| author | Laurentiu Tudor <laurentiu.tudor@nxp.com> | 2020-07-17 17:47:59 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-07-23 16:54:33 +0200 |
| commit | 9a872def598195d2de4a4a74e17804142e2aa78e (patch) | |
| tree | 101f0671ac49003467655ada35727a190052e332 | |
| parent | bus: fsl-mc: add missing device types (diff) | |
| download | linux-9a872def598195d2de4a4a74e17804142e2aa78e.tar.xz linux-9a872def598195d2de4a4a74e17804142e2aa78e.zip | |
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 <laurentiu.tudor@nxp.com>
Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Reviewed-by: Laurentiu Tudor <laurentiu.tudor@nxp.com>
Link: https://lore.kernel.org/r/20200717154800.17169-3-ioana.ciornei@nxp.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/bus/fsl-mc/mc-io.c | 2 | ||||
| -rw-r--r-- | drivers/bus/fsl-mc/mc-sys.c | 4 | ||||
| -rw-r--r-- | include/linux/fsl/mc.h | 2 |
3 files changed, 4 insertions, 4 deletions
diff --git a/drivers/bus/fsl-mc/mc-io.c b/drivers/bus/fsl-mc/mc-io.c index 6ae48ad80409..a30b53f1d87d 100644 --- 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 device *dev, 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); diff --git a/drivers/bus/fsl-mc/mc-sys.c b/drivers/bus/fsl-mc/mc-sys.c index 3221a7fbaf0a..85a0225db522 100644 --- 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_io, struct fsl_mc_command *cmd) 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_io, struct fsl_mc_command *cmd) 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); diff --git a/include/linux/fsl/mc.h b/include/linux/fsl/mc.h index cdb03aca2aef..a428c61ead6e 100644 --- a/include/linux/fsl/mc.h +++ b/include/linux/fsl/mc.h @@ -339,7 +339,7 @@ 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() */ }; }; |