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Date: Thu, 14 Feb 2013 11:00:15 +0200 From: Andy Shevchenko <andriy.shevchenko@...ux.intel.com> To: Vinod Koul <vinod.koul@...el.com>, linux-kernel@...r.kernel.org, Viresh Kumar <viresh.kumar@...aro.org> Cc: Andy Shevchenko <andriy.shevchenko@...ux.intel.com> Subject: [PATCH v2 1/6] 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@...ux.intel.com> Acked-by: Rob Herring <rob.herring@...xeda.com> Acked-by: Viresh Kumar <viresh.kumar@...aro.org> --- drivers/dma/of-dma.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/dma/of-dma.c b/drivers/dma/of-dma.c index 59631b2..1ae6120 100644 --- a/drivers/dma/of-dma.c +++ b/drivers/dma/of-dma.c @@ -117,7 +117,9 @@ 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; } -- 1.7.10.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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