https://github.com/torvalds/linux
Revision cc18b939e1efbc2a47f62dbd2b1df53d974df6b7 authored by Steve Wise on 24 April 2014, 19:31:53 UTC, committed by Roland Dreier on 29 April 2014, 00:29:41 UTC
In cases where the cm calls c4iw_modify_rc_qp() with the endpoint mutex held, they must be called with internal == 1. rx_data() and process_mpa_reply() are not doing this. This causes a deadlock because c4iw_modify_rc_qp() might call c4iw_ep_disconnect() in some !internal cases, and c4iw_ep_disconnect() acquires the endpoint mutex. The design was intended to only do the disconnect for !internal calls. Change rx_data(), FPDU_MODE case, to call c4iw_modify_rc_qp() with internal == 1, and then disconnect only after releasing the mutex. Change process_mpa_reply() to call c4iw_modify_rc_qp(TERMINATE) with internal == 1 and set a new attr flag telling it to send a TERMINATE message. Previously this was implied by !internal. Change process_mpa_reply() to return whether the caller should disconnect after releasing the endpoint mutex. Now rx_data() will do the disconnect in the cases where process_mpa_reply() wants to disconnect after the TERMINATE is sent. Change c4iw_modify_rc_qp() RTS->TERM to only disconnect if !internal, and to send a TERMINATE message if attrs->send_term is 1. Change abort_connection() to not aquire the ep mutex for setting the state, and make all calls to abort_connection() do so with the mutex held. Signed-off-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: Roland Dreier <roland@purestorage.com>
1 parent d1db0ee
Tip revision: cc18b939e1efbc2a47f62dbd2b1df53d974df6b7 authored by Steve Wise on 24 April 2014, 19:31:53 UTC
RDMA/cxgb4: Fix endpoint mutex deadlocks
RDMA/cxgb4: Fix endpoint mutex deadlocks
Tip revision: cc18b93
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arch | ||
block | ||
crypto | ||
drivers | ||
firmware | ||
fs | ||
include | ||
init | ||
ipc | ||
kernel | ||
lib | ||
mm | ||
net | ||
samples | ||
scripts | ||
security | ||
sound | ||
tools | ||
usr | ||
virt | ||
.gitignore | -rw-r--r-- | 1.1 KB |
.mailmap | -rw-r--r-- | 4.4 KB |
COPYING | -rw-r--r-- | 18.3 KB |
CREDITS | -rw-r--r-- | 93.6 KB |
Kbuild | -rw-r--r-- | 2.5 KB |
Kconfig | -rw-r--r-- | 252 bytes |
MAINTAINERS | -rw-r--r-- | 271.4 KB |
Makefile | -rw-r--r-- | 50.5 KB |
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