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| author | Dave Jiang <dave.jiang@intel.com> | 2020-05-01 08:21:18 -0700 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2020-05-04 14:25:37 +0530 |
| commit | 4f302642b70c1348773fe7e3ded9fc315fa92990 (patch) | |
| tree | 0df10b16fad5f35b8b1fe3a0c94102966aafc7d5 /drivers/dma/bestcomm | |
| parent | f8f482deb078389b42768b2193e050a81aae137d (diff) | |
| download | linux-4f302642b70c1348773fe7e3ded9fc315fa92990.tar.bz2 | |
dmaengine: idxd: fix interrupt completion after unmasking
The current implementation may miss completions after we unmask the
interrupt. In order to make sure we process all competions, we need to:
1. Do an MMIO read from the device as a barrier to ensure that all PCI
writes for completions have arrived.
2. Check for any additional completions that we missed.
Fixes: 8f47d1a5e545 ("dmaengine: idxd: connect idxd to dmaengine subsystem")
Reported-by: Sanjay Kumar <sanjay.k.kumar@intel.com>
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/158834641769.35613.1341160109892008587.stgit@djiang5-desk3.ch.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'drivers/dma/bestcomm')
0 files changed, 0 insertions, 0 deletions