svcrdma: avoid duplicate dma unmapping during error recovery

In rdma_read_chunk_frmr() when ib_post_send() fails, the error code path
invokes ib_dma_unmap_sg() to unmap the sg list. It then invokes
svc_rdma_put_frmr() which in turn tries to unmap the same sg list through
ib_dma_unmap_sg() again. This second unmap is invalid and could lead to
problems when the iova being unmapped is subsequently reused. Remove
the call to unmap in rdma_read_chunk_frmr() and let svc_rdma_put_frmr()
handle it.

Fixes: 412a15c0fe53 ("svcrdma: Port to new memory registration API")
Cc: stable@vger.kernel.org
Signed-off-by: Sriharsha Basavapatna <sriharsha.basavapatna@broadcom.com>
Reviewed-by: Chuck Lever <chuck.lever@oracle.com>
Reviewed-by: Yuval Shaia <yuval.shaia@oracle.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>

path: root/include/dt-bindings/i2c/i2c.h

/*
 * This header provides constants for I2C bindings
 *
 * Copyright (C) 2015 by Sang Engineering
 * Copyright (C) 2015 by Renesas Electronics Corporation
 *
 * Wolfram Sang <wsa@sang-engineering.com>
 *
 * GPLv2 only
 */

#ifndef _DT_BINDINGS_I2C_I2C_H
#define _DT_BINDINGS_I2C_I2C_H

#define I2C_TEN_BIT_ADDRESS	(1 << 31)
#define I2C_OWN_SLAVE_ADDRESS	(1 << 30)

#endif