Merge tag 'dma-mapping-6.7-2023-11-10' of git://git.infradead.org/users/hch/dma-mapping

[linux-2.6-microblaze.git] / drivers / parport / procfs.c

diff --git a/drivers/parport/procfs.c b/drivers/parport/procfs.c
index 532d5cb..bd38856 100644 (file)
--- a/drivers/parport/procfs.c
+++ b/drivers/parport/procfs.c
@@ -32,13 +32,6 @@
 #define PARPORT_MAX_TIMESLICE_VALUE ((unsigned long) HZ)
 #define PARPORT_MIN_SPINTIME_VALUE 1
 #define PARPORT_MAX_SPINTIME_VALUE 1000
-/*
- * PARPORT_BASE_* is the size of the known parts of the sysctl path
- * in dev/partport/%s/devices/%s. "dev/parport/"(12), "/devices/"(9
- * and null char(1).
- */
-#define PARPORT_BASE_PATH_SIZE 13
-#define PARPORT_BASE_DEVICES_PATH_SIZE 22
 
 static int do_active_device(struct ctl_table *table, int write,
                      void *result, size_t *lenp, loff_t *ppos)
@@ -423,8 +416,7 @@ int parport_proc_register(struct parport *port)
 {
        struct parport_sysctl_table *t;
        char *tmp_dir_path;
-       size_t tmp_path_len, port_name_len;
-       int bytes_written, i, err = 0;
+       int i, err = 0;
 
        t = kmemdup(&parport_sysctl_template, sizeof(*t), GFP_KERNEL);
        if (t == NULL)
@@ -440,35 +432,23 @@ int parport_proc_register(struct parport *port)
 #endif /* IEEE 1284 support */
        }
 
-       port_name_len = strnlen(port->name, PARPORT_NAME_MAX_LEN);
-       /*
-        * Allocate a buffer for two paths: dev/parport/PORT and dev/parport/PORT/devices.
-        * We calculate for the second as that will give us enough for the first.
-        */
-       tmp_path_len = PARPORT_BASE_DEVICES_PATH_SIZE + port_name_len;
-       tmp_dir_path = kzalloc(tmp_path_len, GFP_KERNEL);
+       tmp_dir_path = kasprintf(GFP_KERNEL, "dev/parport/%s/devices", port->name);
        if (!tmp_dir_path) {
                err = -ENOMEM;
                goto exit_free_t;
        }
 
-       bytes_written = snprintf(tmp_dir_path, tmp_path_len,
-                                "dev/parport/%s/devices", port->name);
-       if (tmp_path_len <= bytes_written) {
-               err = -ENOENT;
-               goto exit_free_tmp_dir_path;
-       }
        t->devices_header = register_sysctl(tmp_dir_path, t->device_dir);
        if (t->devices_header == NULL) {
                err = -ENOENT;
                goto  exit_free_tmp_dir_path;
        }
 
-       tmp_path_len = PARPORT_BASE_PATH_SIZE + port_name_len;
-       bytes_written = snprintf(tmp_dir_path, tmp_path_len,
-                                "dev/parport/%s", port->name);
-       if (tmp_path_len <= bytes_written) {
-               err = -ENOENT;
+       kfree(tmp_dir_path);
+
+       tmp_dir_path = kasprintf(GFP_KERNEL, "dev/parport/%s", port->name);
+       if (!tmp_dir_path) {
+               err = -ENOMEM;
                goto unregister_devices_h;
        }
 
@@ -508,34 +488,22 @@ int parport_proc_unregister(struct parport *port)
 
 int parport_device_proc_register(struct pardevice *device)
 {
-       int bytes_written, err = 0;
        struct parport_device_sysctl_table *t;
        struct parport * port = device->port;
-       size_t port_name_len, device_name_len, tmp_dir_path_len;
        char *tmp_dir_path;
+       int err = 0;
        
        t = kmemdup(&parport_device_sysctl_template, sizeof(*t), GFP_KERNEL);
        if (t == NULL)
                return -ENOMEM;
 
-       port_name_len = strnlen(port->name, PARPORT_NAME_MAX_LEN);
-       device_name_len = strnlen(device->name, PATH_MAX);
-
        /* Allocate a buffer for two paths: dev/parport/PORT/devices/DEVICE. */
-       tmp_dir_path_len = PARPORT_BASE_DEVICES_PATH_SIZE + port_name_len + device_name_len;
-       tmp_dir_path = kzalloc(tmp_dir_path_len, GFP_KERNEL);
+       tmp_dir_path = kasprintf(GFP_KERNEL, "dev/parport/%s/devices/%s", port->name, device->name);
        if (!tmp_dir_path) {
                err = -ENOMEM;
                goto exit_free_t;
        }
 
-       bytes_written = snprintf(tmp_dir_path, tmp_dir_path_len, "dev/parport/%s/devices/%s",
-                                port->name, device->name);
-       if (tmp_dir_path_len <= bytes_written) {
-               err = -ENOENT;
-               goto exit_free_path;
-       }
-
        t->vars[0].data = &device->timeslice;
 
        t->sysctl_header = register_sysctl(tmp_dir_path, t->vars);
@@ -548,9 +516,6 @@ int parport_device_proc_register(struct pardevice *device)
        kfree(tmp_dir_path);
        return 0;
 
-exit_free_path:
-       kfree(tmp_dir_path);
-
 exit_free_t:
        kfree(t);