linux-toradex.git/drivers/hv, branch v3.10.78 Linux kernel for Apalis and Colibri modules Drivers: hv: vmbus: Don't wait after requesting offers 2015-05-13T12:15:43+00:00 K. Y. Srinivasan kys@microsoft.com 2015-03-19T15:11:34+00:00 b5837189c92212ed5b14a0cc7aca4e477d230bd8 commit 73cffdb65e679b98893f484063462c045adcf212 upstream. Don't wait after sending request for offers to the host. This wait is unnecessary and simply adds 5 seconds to the boot time. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Cc: <stable@vger.kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
commit 73cffdb65e679b98893f484063462c045adcf212 upstream.

Don't wait after sending request for offers to the host. This wait is
unnecessary and simply adds 5 seconds to the boot time.

Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Drivers: hv: vmbus: Fix a bug in the error path in vmbus_open() 2015-05-06T19:56:26+00:00 K. Y. Srinivasan kys@microsoft.com 2015-02-27T19:26:04+00:00 b020a4676df1d550f893801f6c722845c2f6d5b3 commit 40384e4bbeb9f2651fe9bffc0062d9f31ef625bf upstream. Correctly rollback state if the failure occurs after we have handed over the ownership of the buffer to the host. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
commit 40384e4bbeb9f2651fe9bffc0062d9f31ef625bf upstream.

Correctly rollback state if the failure occurs after we have handed over
the ownership of the buffer to the host.

Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Drivers: hv: vmbus: incorrect device name is printed when child device is unregistered 2015-03-18T12:22:35+00:00 Fernando Soto fsoto@bluecatnetworks.com 2013-06-14T23:13:35+00:00 a370f956f5ff526e98a6fc7e71ac4175ad0b2503 commit 84672369ffb98a51d4ddf74c20a23636da3ad615 upstream. Whenever a device is unregistered in vmbus_device_unregister (drivers/hv/vmbus_drv.c), the device name in the log message may contain garbage as the memory has already been freed by the time pr_info is called. Log example: [ 3149.170475] hv_vmbus: child device àõsèè0_5 unregistered By logging the message just before calling device_unregister, the correct device name is printed: [ 3145.034652] hv_vmbus: child device vmbus_0_5 unregistered Also changing register & unregister messages to debug to avoid unnecessarily cluttering the kernel log. Signed-off-by: Fernando M Soto <fsoto@bluecatnetworks.com> Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Cc: Joseph Salisbury <joseph.salisbury@canonical.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
commit 84672369ffb98a51d4ddf74c20a23636da3ad615 upstream.

Whenever a device is unregistered in vmbus_device_unregister (drivers/hv/vmbus_drv.c), the device name in the log message may contain garbage as the memory has already been freed by the time pr_info is called. Log example:
 [ 3149.170475] hv_vmbus: child device àõsèè0_5 unregistered

By logging the message just before calling device_unregister, the correct device name is printed:
[ 3145.034652] hv_vmbus: child device vmbus_0_5 unregistered

Also changing register & unregister messages to debug to avoid unnecessarily cluttering the kernel log.

Signed-off-by: Fernando M Soto <fsoto@bluecatnetworks.com>
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Cc: Joseph Salisbury <joseph.salisbury@canonical.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Drivers: hv: vmbus: Fix a bug in vmbus_open() 2014-10-30T16:35:11+00:00 K. Y. Srinivasan kys@microsoft.com 2014-08-27T23:25:35+00:00 bd6174827fa6862fc2b59c2e0eeee5e5329befa2 commit 45d727cee9e200f5b351528b9fb063b69cf702c8 upstream. Fix a bug in vmbus_open() and properly propagate the error. I would like to thank Dexuan Cui <decui@microsoft.com> for identifying the issue. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Tested-by: Sitsofe Wheeler <sitsofe@yahoo.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
commit 45d727cee9e200f5b351528b9fb063b69cf702c8 upstream.

Fix a bug in vmbus_open() and properly propagate the error. I would
like to thank Dexuan Cui <decui@microsoft.com> for identifying the
issue.

Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Tested-by: Sitsofe Wheeler <sitsofe@yahoo.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Drivers: hv: vmbus: Cleanup vmbus_establish_gpadl() 2014-10-30T16:35:11+00:00 K. Y. Srinivasan kys@microsoft.com 2014-08-27T23:25:34+00:00 b5e03dd7bfe9a3a9cdeb160f869b3c264d51706f commit 72c6b71c245dac8f371167d97ef471b367d0b66b upstream. Eliminate the call to BUG_ON() by waiting for the host to respond. We are trying to reclaim the ownership of memory that was given to the host and so we will have to wait until the host responds. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Tested-by: Sitsofe Wheeler <sitsofe@yahoo.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
commit 72c6b71c245dac8f371167d97ef471b367d0b66b upstream.

Eliminate the call to BUG_ON() by waiting for the host to respond. We are
trying to reclaim the ownership of memory that was given to the host and so
we will have to wait until the host responds.

Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Tested-by: Sitsofe Wheeler <sitsofe@yahoo.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Drivers: hv: vmbus: Cleanup vmbus_teardown_gpadl() 2014-10-30T16:35:11+00:00 K. Y. Srinivasan kys@microsoft.com 2014-08-27T23:25:32+00:00 a443461e9e0068d13ca632610f1bcb300f7f8768 commit 66be653083057358724d56d817e870e53fb81ca7 upstream. Eliminate calls to BUG_ON() by properly handling errors. In cases where rollback is possible, we will return the appropriate error to have the calling code decide how to rollback state. In the case where we are transferring ownership of the guest physical pages to the host, we will wait for the host to respond. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Tested-by: Sitsofe Wheeler <sitsofe@yahoo.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
commit 66be653083057358724d56d817e870e53fb81ca7 upstream.

Eliminate calls to BUG_ON() by properly handling errors. In cases where
rollback is possible, we will return the appropriate error to have the
calling code decide how to rollback state. In the case where we are
transferring ownership of the guest physical pages to the host,
we will wait for the host to respond.

Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Tested-by: Sitsofe Wheeler <sitsofe@yahoo.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Drivers: hv: vmbus: Cleanup vmbus_post_msg() 2014-10-30T16:35:10+00:00 K. Y. Srinivasan kys@microsoft.com 2014-08-27T23:25:31+00:00 55a5b2114b4783803cd5dfb6d237be2158329b6b commit fdeebcc62279119dbeafbc1a2e39e773839025fd upstream. Posting messages to the host can fail because of transient resource related failures. Correctly deal with these failures and increase the number of attempts to post the message before giving up. In this version of the patch, I have normalized the error code to Linux error code. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Tested-by: Sitsofe Wheeler <sitsofe@yahoo.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
commit fdeebcc62279119dbeafbc1a2e39e773839025fd upstream.

Posting messages to the host can fail because of transient resource
related failures. Correctly deal with these failures and increase the
number of attempts to post the message before giving up.

In this version of the patch, I have normalized the error code to
Linux error code.

Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Tested-by: Sitsofe Wheeler <sitsofe@yahoo.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Drivers: hv: util: Fix a bug in the KVP code 2014-07-28T15:00:02+00:00 K. Y. Srinivasan kys@microsoft.com 2014-07-07T23:34:25+00:00 9ac5d53ca3d2c5b849a57227cc5b0c958692cfdb commit 9bd2d0dfe4714dd5d7c09a93a5c9ea9e14ceb3fc upstream. Add code to poll the channel since we process only one message at a time and the host may not interrupt us. Also increase the receive buffer size since some KVP messages are close to 8K bytes in size. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
commit 9bd2d0dfe4714dd5d7c09a93a5c9ea9e14ceb3fc upstream.

Add code to poll the channel since we process only one message
at a time and the host may not interrupt us. Also increase the
receive buffer size since some KVP messages are close to 8K bytes in size.

Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Drivers: hv: vmbus: Fix a bug in the channel callback dispatch code 2014-07-17T22:58:02+00:00 K. Y. Srinivasan kys@microsoft.com 2014-07-07T23:34:24+00:00 17256c6385fd3a5e000a9d2e9b89eb09f70b46e6 commit affb1aff300ddee54df307812b38f166e8a865ef upstream. Starting with Win8, we have implemented several optimizations to improve the scalability and performance of the VMBUS transport between the Host and the Guest. Some of the non-performance critical services cannot leverage these optimization since they only read and process one message at a time. Make adjustments to the callback dispatch code to account for the way non-performance critical drivers handle reading of the channel. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
commit affb1aff300ddee54df307812b38f166e8a865ef upstream.

Starting with Win8, we have implemented several optimizations to improve the
scalability and performance of the VMBUS transport between the Host and the
Guest. Some of the non-performance critical services cannot leverage these
optimization since they only read and process one message at a time.
Make adjustments to the callback dispatch code to account for the way
non-performance critical drivers handle reading of the channel.

Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Drivers: hv: balloon: Ensure pressure reports are posted regularly 2014-06-26T19:12:40+00:00 K. Y. Srinivasan kys@microsoft.com 2014-04-23T20:53:39+00:00 72d1e4f6c1530d2c9c8e0d82b2c2e2ab9bf7034a commit ae339336dc950b9b05e7ccd3565dd3e8781c06d9 upstream. The current code posts periodic memory pressure status from a dedicated thread. Under some conditions, especially when we are releasing a lot of memory into the guest, we may not send timely pressure reports back to the host. Fix this issue by reporting pressure in all contexts that can be active in this driver. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
commit ae339336dc950b9b05e7ccd3565dd3e8781c06d9 upstream.

The current code posts periodic memory pressure status from a dedicated thread.
Under some conditions, especially when we are releasing a lot of memory into
the guest, we may not send timely pressure reports back to the host. Fix this
issue by reporting pressure in all contexts that can be active in this driver.

Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>