diff options
Diffstat (limited to 'target/linux/layerscape/patches-5.4/701-net-0148-bus-fsl-mc-use-raw-spin-lock-to-serialize-mc-cmds.patch')
| -rw-r--r-- | target/linux/layerscape/patches-5.4/701-net-0148-bus-fsl-mc-use-raw-spin-lock-to-serialize-mc-cmds.patch | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/target/linux/layerscape/patches-5.4/701-net-0148-bus-fsl-mc-use-raw-spin-lock-to-serialize-mc-cmds.patch b/target/linux/layerscape/patches-5.4/701-net-0148-bus-fsl-mc-use-raw-spin-lock-to-serialize-mc-cmds.patch new file mode 100644 index 0000000000..42934e2245 --- /dev/null +++ b/target/linux/layerscape/patches-5.4/701-net-0148-bus-fsl-mc-use-raw-spin-lock-to-serialize-mc-cmds.patch @@ -0,0 +1,58 @@ +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() */ + }; + }; + |