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authorLaurentiu Tudor <laurentiu.tudor@nxp.com>2020-07-17 18:47:59 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2020-07-23 17:54:33 +0300
commit9a872def598195d2de4a4a74e17804142e2aa78e (patch)
tree101f0671ac49003467655ada35727a190052e332 /drivers/bus
parenta3b7a581823857fab4fae71be9d1c830af78a766 (diff)
downloadlinux-9a872def598195d2de4a4a74e17804142e2aa78e.tar.xz
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>
Diffstat (limited to 'drivers/bus')
-rw-r--r--drivers/bus/fsl-mc/mc-io.c2
-rw-r--r--drivers/bus/fsl-mc/mc-sys.c4
2 files changed, 3 insertions, 3 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);