Messages in this thread Patch in this message | | | From | Arve Hjønnevåg <> | Subject | [PATCH 3/5] ARM: etm: Don't trigger another overflow when trying to clear the RAM-full status | Date | Wed, 2 Feb 2011 18:54:21 -0800 |
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If the write address was at the end of the buffer, toggling the trace capture bit would set the RAM-full status instead of clearing it.
Signed-off-by: Arve Hjønnevåg <arve@android.com> --- arch/arm/kernel/etm.c | 2 ++ 1 files changed, 2 insertions(+), 0 deletions(-)
diff --git a/arch/arm/kernel/etm.c b/arch/arm/kernel/etm.c index 2ea0b7c..7652e9f 100644 --- a/arch/arm/kernel/etm.c +++ b/arch/arm/kernel/etm.c @@ -235,6 +235,7 @@ static void etm_dump(void) printk(KERN_INFO "\n--- ETB buffer end ---\n"); /* deassert the overflow bit */ + etb_writel(t, 0, ETBR_WRITEADDR); etb_writel(t, 1, ETBR_CTRL); etb_writel(t, 0, ETBR_CTRL); @@ -300,6 +301,7 @@ static ssize_t etb_read(struct file *file, char __user *data, buf[i] = etb_readl(t, ETBR_READMEM); /* the only way to deassert overflow bit in ETB status is this */ + etb_writel(t, 0, ETBR_WRITEADDR); etb_writel(t, 1, ETBR_CTRL); etb_writel(t, 0, ETBR_CTRL); -- 1.7.3.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.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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