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[IB/ucm]: Clean up userspace CM 

Only print debug messages when debug_level is set.
Eliminate NULL checks prior to calling kfree.

Signed-off-by: Hal Rosenstock <halr@voltaire.com>
Signed-off-by: Libor Michalek <libor@topspin.com>
This commit is contained in:
Hal Rosenstock 2005-07-27 20:38:56 -07:00 committed by Roland Dreier
parent 2868bd281f
commit 79d8190759
1 changed files with 41 additions and 47 deletions
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88
drivers/infiniband/core/ucm.c
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@ -49,6 +49,11 @@ MODULE_AUTHOR("Libor Michalek");
MODULE_DESCRIPTION("InfiniBand userspace Connection Manager access");
MODULE_LICENSE("Dual BSD/GPL");
static int ucm_debug_level;
module_param_named(debug_level, ucm_debug_level, int, 0644);
MODULE_PARM_DESC(debug_level, "Enable debug tracing if > 0");
enum {
IB_UCM_MAJOR = 231,
IB_UCM_MINOR = 255
@ -56,6 +61,14 @@ enum {
#define IB_UCM_DEV MKDEV(IB_UCM_MAJOR, IB_UCM_MINOR)
#define PFX "UCM: "
#define ucm_dbg(format, arg...) \
do { \
if (ucm_debug_level > 0) \
printk(KERN_DEBUG PFX format, ## arg); \
} while (0)
static struct semaphore ctx_id_mutex;
static struct idr ctx_id_table;
static int ctx_id_rover = 0;
@ -107,7 +120,7 @@ static void ib_ucm_ctx_put(struct ib_ucm_context *ctx)
up(&ctx->file->mutex);
printk(KERN_ERR "UCM: Destroyed CM ID <%d>\n", ctx->id);
ucm_dbg("Destroyed CM ID <%d>\n", ctx->id);
ib_destroy_cm_id(ctx->cm_id);
kfree(ctx);
@ -145,7 +158,7 @@ retry:
if (result)
goto error;
printk(KERN_ERR "UCM: Allocated CM ID <%d>\n", ctx->id);
ucm_dbg("Allocated CM ID <%d>\n", ctx->id);
return ctx;
error:
@ -378,10 +391,8 @@ static int ib_ucm_event_process(struct ib_cm_event *evt,
return 0;
error:
if (uvt->info)
kfree(uvt->info);
if (uvt->data)
kfree(uvt->data);
kfree(uvt->info);
kfree(uvt->data);
return result;
}
@ -407,8 +418,7 @@ static int ib_ucm_event_handler(struct ib_cm_id *cm_id,
break;
}
printk(KERN_ERR "UCM: Event. CM ID <%d> event <%d>\n",
id, event->event);
ucm_dbg("Event. CM ID <%d> event <%d>\n", id, event->event);
ctx = ib_ucm_ctx_get(id);
if (!ctx)
@ -551,10 +561,8 @@ user:
list_del(&uevent->file_list);
list_del(&uevent->ctx_list);
if (uevent->data)
kfree(uevent->data);
if (uevent->info)
kfree(uevent->info);
kfree(uevent->data);
kfree(uevent->info);
kfree(uevent);
done:
up(&file->mutex);
@ -846,12 +854,9 @@ static ssize_t ib_ucm_send_req(struct ib_ucm_file *file,
up(&ctx->file->mutex);
ib_ucm_ctx_put(ctx); /* func reference */
done:
if (param.private_data)
kfree(param.private_data);
if (param.primary_path)
kfree(param.primary_path);
if (param.alternate_path)
kfree(param.alternate_path);
kfree(param.private_data);
kfree(param.primary_path);
kfree(param.alternate_path);
return result;
}
@ -900,8 +905,7 @@ static ssize_t ib_ucm_send_rep(struct ib_ucm_file *file,
up(&ctx->file->mutex);
ib_ucm_ctx_put(ctx); /* func reference */
done:
if (param.private_data)
kfree(param.private_data);
kfree(param.private_data);
return result;
}
@ -939,8 +943,7 @@ static ssize_t ib_ucm_send_private_data(struct ib_ucm_file *file,
up(&ctx->file->mutex);
ib_ucm_ctx_put(ctx); /* func reference */
done:
if (private_data)
kfree(private_data);
kfree(private_data);
return result;
}
@ -1009,10 +1012,8 @@ static ssize_t ib_ucm_send_info(struct ib_ucm_file *file,
up(&ctx->file->mutex);
ib_ucm_ctx_put(ctx); /* func reference */
done:
if (data)
kfree(data);
if (info)
kfree(info);
kfree(data);
kfree(info);
return result;
}
@ -1063,8 +1064,7 @@ static ssize_t ib_ucm_send_mra(struct ib_ucm_file *file,
up(&ctx->file->mutex);
ib_ucm_ctx_put(ctx); /* func reference */
done:
if (data)
kfree(data);
kfree(data);
return result;
}
@ -1105,10 +1105,8 @@ static ssize_t ib_ucm_send_lap(struct ib_ucm_file *file,
up(&ctx->file->mutex);
ib_ucm_ctx_put(ctx); /* func reference */
done:
if (data)
kfree(data);
if (path)
kfree(path);
kfree(data);
kfree(path);
return result;
}
@ -1157,10 +1155,8 @@ static ssize_t ib_ucm_send_sidr_req(struct ib_ucm_file *file,
up(&ctx->file->mutex);
ib_ucm_ctx_put(ctx); /* func reference */
done:
if (param.private_data)
kfree(param.private_data);
if (param.path)
kfree(param.path);
kfree(param.private_data);
kfree(param.path);
return result;
}
@ -1209,10 +1205,8 @@ static ssize_t ib_ucm_send_sidr_rep(struct ib_ucm_file *file,
up(&ctx->file->mutex);
ib_ucm_ctx_put(ctx); /* func reference */
done:
if (param.private_data)
kfree(param.private_data);
if (param.info)
kfree(param.info);
kfree(param.private_data);
kfree(param.info);
return result;
}
@ -1252,8 +1246,8 @@ static ssize_t ib_ucm_write(struct file *filp, const char __user *buf,
if (copy_from_user(&hdr, buf, sizeof(hdr)))
return -EFAULT;
printk(KERN_ERR "UCM: Write. cmd <%d> in <%d> out <%d> len <%Zu>\n",
hdr.cmd, hdr.in, hdr.out, len);
ucm_dbg("Write. cmd <%d> in <%d> out <%d> len <%Zu>\n",
hdr.cmd, hdr.in, hdr.out, len);
if (hdr.cmd < 0 || hdr.cmd >= ARRAY_SIZE(ucm_cmd_table))
return -EINVAL;
@ -1300,7 +1294,7 @@ static int ib_ucm_open(struct inode *inode, struct file *filp)
filp->private_data = file;
file->filp = filp;
printk(KERN_ERR "UCM: Created struct\n");
ucm_dbg("Created struct\n");
return 0;
}
@ -1326,7 +1320,7 @@ static int ib_ucm_close(struct inode *inode, struct file *filp)
kfree(file);
printk(KERN_ERR "UCM: Deleted struct\n");
ucm_dbg("Deleted struct\n");
return 0;
}
@ -1348,7 +1342,7 @@ static int __init ib_ucm_init(void)
result = register_chrdev_region(IB_UCM_DEV, 1, "infiniband_cm");
if (result) {
printk(KERN_ERR "UCM: Error <%d> registering dev\n", result);
ucm_dbg("Error <%d> registering dev\n", result);
goto err_chr;
}
@ -1356,14 +1350,14 @@ static int __init ib_ucm_init(void)
result = cdev_add(&ib_ucm_cdev, IB_UCM_DEV, 1);
if (result) {
printk(KERN_ERR "UCM: Error <%d> adding cdev\n", result);
ucm_dbg("Error <%d> adding cdev\n", result);
goto err_cdev;
}
ib_ucm_class = class_create(THIS_MODULE, "infiniband_cm");
if (IS_ERR(ib_ucm_class)) {
result = PTR_ERR(ib_ucm_class);
printk(KERN_ERR "UCM: Error <%d> creating class\n", result);
ucm_dbg("Error <%d> creating class\n", result);
goto err_class;
}