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i2c: ismt: initialize DMA buffer

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commit bf4169100c upstream.

This patch adds code to initialize the DMA buffer to compensate for
possible hardware data corruption.

Signed-off-by: James Ralston <james.d.ralston@intel.com>
[wsa: changed to use 'sizeof']
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Cc: Jean Delvare <jdelvare@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
James Ralston
2013-09-24 16:47:55 -07:00
committed by Greg Kroah-Hartman
parent 2d99b6dd66
commit fe0051d83c
1 changed files with 3 additions and 0 deletions
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3
drivers/i2c/busses/i2c-ismt.c
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@@ -393,6 +393,9 @@ static int ismt_access(struct i2c_adapter *adap, u16 addr,
desc = &priv->hw[priv->head];
/* Initialize the DMA buffer */
memset(priv->dma_buffer, 0, sizeof(priv->dma_buffer));
/* Initialize the descriptor */
memset(desc, 0, sizeof(struct ismt_desc));
desc->tgtaddr_rw = ISMT_DESC_ADDR_RW(addr, read_write);