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From 035546179039d430b32b2cace256552455abf061 Mon Sep 17 00:00:00 2001
From: Laurentiu Tudor <laurentiu.tudor@nxp.com>
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 <laurentiu.tudor@nxp.com>
---
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() */
};
};
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