The mutex has to be acquired on register write to avoid interference
with a simultaneous retu_set_clear_reg_bits operation.
Signed-off-by: Michael Buesch <mb@xxxxxxxxx>
---
Tested on n810.
Index: linux-omap-2.6/drivers/cbus/retu.c
===================================================================
--- linux-omap-2.6.orig/drivers/cbus/retu.c 2011-02-23 23:32:26.388763324 +0100
+++ linux-omap-2.6/drivers/cbus/retu.c 2011-02-26 23:27:08.772462280 +0100
@@ -120,7 +120,9 @@
{
struct retu *retu = dev_get_drvdata(child->parent);
+ mutex_lock(&retu->mutex);
__retu_write_reg(retu, reg, val);
+ mutex_unlock(&retu->mutex);
}
EXPORT_SYMBOL_GPL(retu_write_reg);
--
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