linux/drivers/ntb, branch v3.9

NTB: Fix Sparse Warnings

2013-01-21T22:34:21Z

Address the sparse warnings and resulting fallout Signed-off-by: Jon Mason Signed-off-by: Greg Kroah-Hartman

NTB: disable x86_32 support

2013-01-21T22:34:21Z

Atomic readq and writeq do not exist by default on some 32bit architectures, thus causing compile errors due to non-existent symbols. Since NTB has not been tested 32bit, disable x86_32 support until such time as this and any other issues can be properly discovered. Signed-off-by: Jon Mason Signed-off-by: Greg Kroah-Hartman

NTB: Update Version

2013-01-20T23:48:13Z

Update NTB version to 0.25 Signed-off-by: Jon Mason Signed-off-by: Greg Kroah-Hartman

NTB: Out of free receive entries issue

2013-01-20T23:45:52Z

If the NTB client driver enqueues the maximum number of rx buffers, it will not be able to re-enqueue another in its callback handler due to a lack of free entries. This can be avoided by adding the current entry to the free queue prior to calling the client callback handler. With this change, ntb_netdev will no longer encounter a rx error on its first packet. Signed-off-by: Jon Mason Signed-off-by: Greg Kroah-Hartman

NTB: Remove reads across NTB

2013-01-20T23:45:51Z

CPU reads across NTB are slow(er) and can hang the local system if an ECC error is encountered on the remote. To work around the need for a read, have the remote side write its current position in the rx buffer to the local system's buffer and use that to see if there is room when transmitting. Signed-off-by: Jon Mason Signed-off-by: Greg Kroah-Hartman

NTB: correct stack usage warning in debugfs_read

2013-01-20T23:45:51Z

Correct gcc warning of using too much stack debugfs_read. This is done by kmallocing the buffer instead of using the char array on stack. Also, shrinking the buffer to something closer to what is currently being used. Signed-off-by: Jon Mason Signed-off-by: Greg Kroah-Hartman

NTB: whitespace cleanups

2013-01-20T23:45:51Z

Whitespace cleanups found via `indent` Signed-off-by: Jon Mason Signed-off-by: Greg Kroah-Hartman

NTB: namespacecheck cleanups

2013-01-20T23:45:51Z

Declare ntb_bus_type static to remove it from name space, and remove unused ntb_get_max_spads function. Found via `make namespacecheck`. Signed-off-by: Jon Mason Signed-off-by: Greg Kroah-Hartman

NTB: use simple_open for debugfs

2013-01-20T23:45:51Z

Use simple_open for debugfs instead of recreating it in the NTB driver. Caught by coccicheck. Signed-off-by: Jon Mason Signed-off-by: Greg Kroah-Hartman

NTB: No sleeping in interrupt context

2013-01-20T23:45:51Z

Move all cancel_delayed_work_sync to a work thread to prevent sleeping in interrupt context (when the NTB link goes down). Caught via 'Sleep inside atomic section checking' Signed-off-by: Jon Mason Signed-off-by: Greg Kroah-Hartman