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| author |   Mike Marciniszyn <mike.marciniszyn@qlogic.com> | 2011-12-23 08:03:41 -0500 |
|---|---|---|
| committer |   Roland Dreier <roland@purestorage.com> | 2012-01-03 20:53:31 -0800 |
| commit | 489471095170ed1c6d0341739a243461638b0e06 (patch) | |
| tree | d5820187d1d24dac7526bba2dd4dafb47c1bb0b3 /drivers/i2c/algos/i2c-algo-bit.c | |
| parent | IB/qib: Fix a possible data corruption when receiving packets (diff) | |
| download | wireguard-linux-489471095170ed1c6d0341739a243461638b0e06.tar.xz wireguard-linux-489471095170ed1c6d0341739a243461638b0e06.zip | |
IB/qib: Optimize locking for get_txreq()
The current code locks the QP s_lock, followed by the pending_lock, I
guess to to protect against the allocate failing.
This patch only locks the pending_lock, assuming that the empty case
is an exeception, in which case the pending_lock is dropped, and the
original code is executed. This will save a lock of s_lock in the
normal case.
The observation is that the sdma descriptors will deplete at twice the
rate of txreq's, so this should be rare.
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@qlogic.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
Diffstat (limited to 'drivers/i2c/algos/i2c-algo-bit.c')
0 files changed, 0 insertions, 0 deletions