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| author | Andy Shevchenko | 2013-02-14 10:00:15 +0100 |
|---|---|---|
| committer | Vinod Koul | 2013-02-14 15:30:53 +0100 |
| commit | 88b386c0a7c278581d2b8e2c2761d12f6475938d (patch) | |
| tree | b4616aeeb7a8c5c057cd52d30a2ecadb744d6f1f /drivers/dma/of-dma.c | |
| parent | dmaengine: ste_dma40: do not remove descriptors for cyclic transfers (diff) | |
| download | kernel-qcow2-linux-88b386c0a7c278581d2b8e2c2761d12f6475938d.tar.gz kernel-qcow2-linux-88b386c0a7c278581d2b8e2c2761d12f6475938d.tar.xz kernel-qcow2-linux-88b386c0a7c278581d2b8e2c2761d12f6475938d.zip | |
dma: of-dma: protect list write operation by spin_lock
It's possible to have an inconsistency in the list due to unprotected operation
on it. The patch adds a proper locking on the list operation.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Rob Herring <rob.herring@calxeda.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Diffstat (limited to 'drivers/dma/of-dma.c')
| -rw-r--r-- | drivers/dma/of-dma.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/dma/of-dma.c b/drivers/dma/of-dma.c index 583e50e3d47c..69d04d28b1ef 100644 --- a/drivers/dma/of-dma.c +++ b/drivers/dma/of-dma.c @@ -118,7 +118,9 @@ int of_dma_controller_register(struct device_node *np, ofdma->use_count = 0; /* Now queue of_dma controller structure in list */ + spin_lock(&of_dma_lock); list_add_tail(&ofdma->of_dma_controllers, &of_dma_list); + spin_unlock(&of_dma_lock); return 0; } |