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authorAndrew Donnellan <andrew.donnellan@au1.ibm.com>2015-08-19 09:27:18 +1000
committerMichael Ellerman <mpe@ellerman.id.au>2015-08-20 16:15:23 +1000
commit7c26b9cf5347c24272152438cdd9675183804425 (patch)
tree532795b6f37fff511ae81bc71d95a98e94e70883 /drivers/misc/cxl/api.c
parenta1a42b7920ba57f287d742d42f113402fbb7c85e (diff)
downloadlinux-stericsson-7c26b9cf5347c24272152438cdd9675183804425.tar.gz
cxl: Allow release of contexts which have been OPENED but not STARTED
If we open a context but do not start it (either because we do not attempt to start it, or because it fails to start for some reason), we are left with a context in state OPENED. Previously, cxl_release_context() only allowed releasing contexts in state CLOSED, so attempting to release an OPENED context would fail. In particular, this bug causes available contexts to run out after some EEH failures, where drivers attempt to release contexts that have failed to start. Allow releasing contexts in any state with a value lower than STARTED, i.e. OPENED or CLOSED (we can't release a STARTED context as it's currently using the hardware, and we assume that contexts in any new states which may be added in future with a value higher than STARTED are also unsafe to release). Cc: stable@vger.kernel.org Fixes: 6f7f0b3df6d4 ("cxl: Add AFU virtual PHB and kernel API") Signed-off-by: Andrew Donnellan <andrew.donnellan@au1.ibm.com> Signed-off-by: Daniel Axtens <dja@axtens.net> Acked-by: Ian Munsie <imunsie@au1.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'drivers/misc/cxl/api.c')
-rw-r--r--drivers/misc/cxl/api.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/misc/cxl/api.c b/drivers/misc/cxl/api.c
index 6a768a9ad22f..f49e3e5db58d 100644
--- a/drivers/misc/cxl/api.c
+++ b/drivers/misc/cxl/api.c
@@ -59,7 +59,7 @@ EXPORT_SYMBOL_GPL(cxl_get_phys_dev);
int cxl_release_context(struct cxl_context *ctx)
{
- if (ctx->status != CLOSED)
+ if (ctx->status >= STARTED)
return -EBUSY;
put_device(&ctx->afu->dev);