user/sven/linux.git/drivers/hv, branch v3.2.82

Drivers: hv: vmbus: Don't wait after requesting offers

2015-08-06T23:32:01Z

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 Signed-off-by: Greg Kroah-Hartman [bwh: Backported to 3.2: deleted variable t was declared as int] Signed-off-by: Ben Hutchings

Drivers: hv: vmbus: Fix a bug in the error path in vmbus_open()

2015-08-06T23:31:59Z

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 Signed-off-by: Greg Kroah-Hartman Signed-off-by: Ben Hutchings

Drivers: hv: vmbus: incorrect device name is printed when child device is unregistered

2015-03-06T00:39:19Z

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 Signed-off-by: K. Y. Srinivasan Signed-off-by: Greg Kroah-Hartman Signed-off-by: Ben Hutchings

Drivers: hv: vmbus: Cleanup hv_post_message()

2014-12-14T16:23:44Z

commit b29ef3546aecb253a5552b198cef23750d56e1e4 upstream. Minimize failures in this function by pre-allocating the buffer for posting messages. The hypercall for posting the message can fail for a number of reasons: 1. Transient resource related issues 2. Buffer alignment 3. Buffer cannot span a page boundry We address issues 2 and 3 by preallocating a per-cpu page for the buffer. Transient resource related failures are handled by retrying by the callers of this function. This patch is based on the investigation done by Dexuan Cui . I would like to thank Sitsofe Wheeler for reporting the issue and helping in debuggging. Signed-off-by: K. Y. Srinivasan Reported-by: Sitsofe Wheeler Tested-by: Sitsofe Wheeler Signed-off-by: Greg Kroah-Hartman [bwh: Backported to 3.2: - s/NR_CPUS/MAX_NUM_CPUS/ - Adjust context, indentation - Also free the page in hv_synic_init() error path] Signed-off-by: Ben Hutchings

Drivers: hv: vmbus: Cleanup vmbus_close_internal()

2014-12-14T16:23:44Z

commit 98d731bb064a9d1817a6ca9bf8b97051334a7cfe upstream. Eliminate calls to BUG_ON() in vmbus_close_internal(). We have chosen to potentially leak memory, than crash the guest in case of failures. In this version of the patch I have addressed comments from Dan Carpenter (dan.carpenter@oracle.com). Signed-off-by: K. Y. Srinivasan Tested-by: Sitsofe Wheeler Signed-off-by: Greg Kroah-Hartman [bwh: Backported to 3.2: function is extern; don't change the return type to int as callers will ignore the value] Signed-off-by: Ben Hutchings

Drivers: hv: vmbus: Fix a bug in vmbus_open()

2014-12-14T16:23:43Z

commit 45d727cee9e200f5b351528b9fb063b69cf702c8 upstream. Fix a bug in vmbus_open() and properly propagate the error. I would like to thank Dexuan Cui for identifying the issue. Signed-off-by: K. Y. Srinivasan Tested-by: Sitsofe Wheeler Signed-off-by: Greg Kroah-Hartman Signed-off-by: Ben Hutchings

Drivers: hv: vmbus: Cleanup vmbus_establish_gpadl()

2014-12-14T16:23:43Z

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 Tested-by: Sitsofe Wheeler Signed-off-by: Greg Kroah-Hartman Signed-off-by: Ben Hutchings

Drivers: hv: vmbus: Cleanup vmbus_teardown_gpadl()

2014-12-14T16:23:43Z

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 Tested-by: Sitsofe Wheeler Signed-off-by: Greg Kroah-Hartman Signed-off-by: Ben Hutchings

Drivers: hv: vmbus: Cleanup vmbus_post_msg()

2014-12-14T16:23:43Z

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 Tested-by: Sitsofe Wheeler Signed-off-by: Greg Kroah-Hartman Signed-off-by: Ben Hutchings

drivers: hv: additional switch to use mb() instead of smp_mb()

2014-04-30T15:23:27Z

commit e4af376d04b0(drivers: hv: switch to use mb() instead of smp_mb()), the adjustment mistakenly dropped the change in hv_ringbuffer_read, so add it. Signed-off-by: Qiang Huang Signed-off-by: Ben Hutchings