35 lines
1.1 KiB
Diff
35 lines
1.1 KiB
Diff
From bf4169100c909667ede6af67668b3ecce6928343 Mon Sep 17 00:00:00 2001
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From: James Ralston <james.d.ralston@intel.com>
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Date: Tue, 24 Sep 2013 16:47:55 -0700
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Subject: i2c: ismt: initialize DMA buffer
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From: James Ralston <james.d.ralston@intel.com>
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commit bf4169100c909667ede6af67668b3ecce6928343 upstream.
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This patch adds code to initialize the DMA buffer to compensate for
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possible hardware data corruption.
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Signed-off-by: James Ralston <james.d.ralston@intel.com>
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[wsa: changed to use 'sizeof']
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Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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Cc: Jean Delvare <jdelvare@suse.de>
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Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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---
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drivers/i2c/busses/i2c-ismt.c | 3 +++
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1 file changed, 3 insertions(+)
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--- a/drivers/i2c/busses/i2c-ismt.c
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+++ b/drivers/i2c/busses/i2c-ismt.c
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@@ -393,6 +393,9 @@ static int ismt_access(struct i2c_adapte
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desc = &priv->hw[priv->head];
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+ /* Initialize the DMA buffer */
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+ memset(priv->dma_buffer, 0, sizeof(priv->dma_buffer));
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+
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/* Initialize the descriptor */
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memset(desc, 0, sizeof(struct ismt_desc));
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desc->tgtaddr_rw = ISMT_DESC_ADDR_RW(addr, read_write);
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