IB/hfi1: Fix module use count flaw due to leftover module put calls

When the try_module_get calls were removed from opening and closing of the
i2c debugfs file, the corresponding module_put calls were missed.  This
results in an inaccurate module use count that requires a power cycle to
fix.

Fixes: 09fbca8e6240 ("IB/hfi1: No need to use try_module_get for debugfs")
Link: https://lore.kernel.org/r/20200623203230.106975.76240.stgit@awfm-01.aw.intel.com
Cc: <stable@vger.kernel.org>
Reviewed-by: Kaike Wan <kaike.wan@intel.com>
Reviewed-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>

diff --git a/drivers/infiniband/hw/hfi1/debugfs.c b/drivers/infiniband/hw/hfi1/debugfs.c
index 4633a0ce1a8c0fdeadf10af7bd42f32b0819709e..2ced236e1553c97c54829a387af413b87f819977 100644 (file)
--- a/drivers/infiniband/hw/hfi1/debugfs.c
+++ b/drivers/infiniband/hw/hfi1/debugfs.c
@@ -985,15 +985,10 @@ static ssize_t qsfp2_debugfs_read(struct file *file, char __user *buf,
 static int __i2c_debugfs_open(struct inode *in, struct file *fp, u32 target)
 {
        struct hfi1_pportdata *ppd;
-       int ret;
 
        ppd = private2ppd(fp);
 
-       ret = acquire_chip_resource(ppd->dd, i2c_target(target), 0);
-       if (ret) /* failed - release the module */
-               module_put(THIS_MODULE);
-
-       return ret;
+       return acquire_chip_resource(ppd->dd, i2c_target(target), 0);
 }
 
 static int i2c1_debugfs_open(struct inode *in, struct file *fp)
@@ -1013,7 +1008,6 @@ static int __i2c_debugfs_release(struct inode *in, struct file *fp, u32 target)
        ppd = private2ppd(fp);
 
        release_chip_resource(ppd->dd, i2c_target(target));
-       module_put(THIS_MODULE);
 
        return 0;
 }
@@ -1031,18 +1025,10 @@ static int i2c2_debugfs_release(struct inode *in, struct file *fp)
 static int __qsfp_debugfs_open(struct inode *in, struct file *fp, u32 target)
 {
        struct hfi1_pportdata *ppd;
-       int ret;
-
-       if (!try_module_get(THIS_MODULE))
-               return -ENODEV;
 
        ppd = private2ppd(fp);
 
-       ret = acquire_chip_resource(ppd->dd, i2c_target(target), 0);
-       if (ret) /* failed - release the module */
-               module_put(THIS_MODULE);
-
-       return ret;
+       return acquire_chip_resource(ppd->dd, i2c_target(target), 0);
 }
 
 static int qsfp1_debugfs_open(struct inode *in, struct file *fp)
@@ -1062,7 +1048,6 @@ static int __qsfp_debugfs_release(struct inode *in, struct file *fp, u32 target)
        ppd = private2ppd(fp);
 
        release_chip_resource(ppd->dd, i2c_target(target));
-       module_put(THIS_MODULE);
 
        return 0;
 }