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| author |   Vaibhav Jain <vaibhav@linux.ibm.com> | 2018-07-04 20:58:33 +0530 |
|---|---|---|
| committer |   Michael Ellerman <mpe@ellerman.id.au> | 2018-07-19 21:58:11 +1000 |
| commit | ef6cb5f1a048fdf91ccee6d63d2bfa293338502d (patch) | |
| tree | 8723504eb84b7bd7724dc77e3bf7381adb7b7d4c /drivers/misc | |
| parent | powerpc/powernv/npu: Add a debugfs setting to change ATSD threshold (diff) | |
| download | linux-dev-ef6cb5f1a048fdf91ccee6d63d2bfa293338502d.tar.xz linux-dev-ef6cb5f1a048fdf91ccee6d63d2bfa293338502d.zip | |
cxl: Fix wrong comparison in cxl_adapter_context_get()
Function atomic_inc_unless_negative() returns a bool to indicate
success/failure. However cxl_adapter_context_get() wrongly compares
the return value against '>=0' which will always be true. The patch
fixes this comparison to '==0' there by also fixing this compile time
warning:
drivers/misc/cxl/main.c:290 cxl_adapter_context_get()
warn: 'atomic_inc_unless_negative(&adapter->contexts_num)' is unsigned
Fixes: 70b565bbdb91 ("cxl: Prevent adapter reset if an active context exists")
Cc: stable@vger.kernel.org # v4.9+
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Vaibhav Jain <vaibhav@linux.ibm.com>
Acked-by: Andrew Donnellan <andrew.donnellan@au1.ibm.com>
Acked-by: Frederic Barrat <fbarrat@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'drivers/misc')
| -rw-r--r-- | drivers/misc/cxl/main.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/misc/cxl/main.c b/drivers/misc/cxl/main.c index 334223b802ee..f35406be465a 100644 --- a/drivers/misc/cxl/main.c +++ b/drivers/misc/cxl/main.c @@ -282,7 +282,7 @@ int cxl_adapter_context_get(struct cxl *adapter) int rc; rc = atomic_inc_unless_negative(&adapter->contexts_num); - return rc >= 0 ? 0 : -EBUSY; + return rc ? 0 : -EBUSY; } void cxl_adapter_context_put(struct cxl *adapter) |