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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2020-09-16 01:20:43 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2020-09-16 01:20:43 +0200 |
| commit | 00acc50506329bef3c28d11481730e6cda01a6a0 (patch) | |
| tree | 134d3a66727d082f1f865d75ee987b1d7f5c962a /drivers/hv/channel_mgmt.c | |
| parent | Merge tag 'for-5.9-rc5-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/... (diff) | |
| parent | Drivers: hv: vmbus: Add timeout to vmbus_wait_for_unload (diff) | |
| download | linux-00acc50506329bef3c28d11481730e6cda01a6a0.tar.xz linux-00acc50506329bef3c28d11481730e6cda01a6a0.zip | |
Merge tag 'hyperv-fixes-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux
Pull hyperv fixes from Wei Liu:
"Two patches from Michael and Dexuan to fix vmbus hanging issues"
* tag 'hyperv-fixes-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux:
Drivers: hv: vmbus: Add timeout to vmbus_wait_for_unload
Drivers: hv: vmbus: hibernation: do not hang forever in vmbus_bus_resume()
Diffstat (limited to 'drivers/hv/channel_mgmt.c')
| -rw-r--r-- | drivers/hv/channel_mgmt.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/hv/channel_mgmt.c b/drivers/hv/channel_mgmt.c index 591106cf58fc..1d44bb635bb8 100644 --- a/drivers/hv/channel_mgmt.c +++ b/drivers/hv/channel_mgmt.c @@ -731,7 +731,7 @@ static void vmbus_wait_for_unload(void) void *page_addr; struct hv_message *msg; struct vmbus_channel_message_header *hdr; - u32 message_type; + u32 message_type, i; /* * CHANNELMSG_UNLOAD_RESPONSE is always delivered to the CPU which was @@ -741,8 +741,11 @@ static void vmbus_wait_for_unload(void) * functional and vmbus_unload_response() will complete * vmbus_connection.unload_event. If not, the last thing we can do is * read message pages for all CPUs directly. + * + * Wait no more than 10 seconds so that the panic path can't get + * hung forever in case the response message isn't seen. */ - while (1) { + for (i = 0; i < 1000; i++) { if (completion_done(&vmbus_connection.unload_event)) break; |