Public bug reported:
Ubuntu 20.04.1 LTS
bcmwl-kernel-source_6.30.223.271
I believe the important part of the
/var/lib/dkms/bcmwl/6.30.223.271+bdcom/build/make.log is below.
/var/lib/dkms/bcmwl/6.30.223.271+bdcom/build/src/wl/sys/wl_linux.c: In function
‘wl_reg_proc_entry’:
/var/lib/dkms/bcmwl/6.30.223.271+bdcom/build/src/wl/sys/wl_linux.c:3376:58:
error: passing argument 4 of ‘proc_create_data’ from incompatible pointe
r type [-Werror=incompatible-pointer-types]
3376 | if ((wl->proc_entry = proc_create_data(tmp, 0644, NULL, &wl_fops, wl))
== NULL) {
| ^~~~~~~~
| |
| const struct
file_operations *
In file included from
/var/lib/dkms/bcmwl/6.30.223.271+bdcom/build/src/wl/sys/wl_linux.c:38:
./include/linux/proc_fs.h:102:31: note: expected ‘const struct proc_ops *’ but
argument is of type ‘const struct file_operations *’
102 | extern struct proc_dir_entry *proc_create_data(const char *, umode_t,
| ^~~~~~~~~~~~~~~~
It looks like
/var/lib/dkms/bcmwl/6.30.223.271+bdcom/build/src/wl/sys/wl_linux.c uses the
file_operations structure.
lines 3359-3381 from wl_linux.c
#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 10, 0)
static const struct file_operations wl_fops = {
.owner = THIS_MODULE,
.read = wl_proc_read,
.write = wl_proc_write,
};
#endif
static int
wl_reg_proc_entry(wl_info_t *wl)
{
char tmp[32];
sprintf(tmp, "%s%d", HYBRID_PROC, wl->pub->unit);
#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 10, 0)
if ((wl->proc_entry = create_proc_entry(tmp, 0644, NULL)) == NULL) {
WL_ERROR(("%s: create_proc_entry %s failed\n", __FUNCTION__,
tmp));
#else
if ((wl->proc_entry = proc_create_data(tmp, 0644, NULL, &wl_fops, wl))
== NULL) {
WL_ERROR(("%s: proc_create_data %s failed\n", __FUNCTION__,
tmp));
#endif
ASSERT(0);
return -1;
}
However, it looks like proc_fs.h uses a different structure (proc_ops).
/usr/src/linux-headers-5.8.0-34-generic/include/linux/proc_fs.h
/usr/src/linux-hwe-5.8-headers-5.8.0-34/include/linux/proc_fs.h
kernel 5.8.0-34
proc_fs.h
lines 29-43
struct proc_ops {
unsigned int proc_flags;
int (*proc_open)(struct inode *, struct file *);
ssize_t (*proc_read)(struct file *, char __user *, size_t, loff_t *);
ssize_t (*proc_write)(struct file *, const char __user *, size_t,
loff_t *);
loff_t (*proc_lseek)(struct file *, loff_t, int);
int (*proc_release)(struct inode *, struct file *);
__poll_t (*proc_poll)(struct file *, struct poll_table_struct *);
long (*proc_ioctl)(struct file *, unsigned int, unsigned long);
#ifdef CONFIG_COMPAT
long (*proc_compat_ioctl)(struct file *, unsigned int, unsigned
long);
#endif
int (*proc_mmap)(struct file *, struct vm_area_struct *);
unsigned long (*proc_get_unmapped_area)(struct file *, unsigned long,
unsigned long, unsigned long, unsigned long);
} __randomize_layout;
and lines 102-107
extern struct proc_dir_entry *proc_create_data(const char *, umode_t,
struct proc_dir_entry *,
const struct proc_ops *,
void *);
struct proc_dir_entry *proc_create(const char *name, umode_t mode,
struct proc_dir_entry *parent, const struct proc_ops *proc_ops);
Looking back at the linux 5.4.0-59 headers, proc_fs.h appears to use the
file_operations structure.
/usr/src/linux-headers-5.4.0-59-generic/include/linux/proc_fs.h
/usr/src/linux-headers-5.4.0-59/include/linux/proc_fs.h
kernel 5.4.0-59
proc_fs.h
lines 44-49
extern struct proc_dir_entry *proc_create_data(const char *, umode_t,
struct proc_dir_entry *,
const struct file_operations *,
void *);
struct proc_dir_entry *proc_create(const char *name, umode_t mode,
struct proc_dir_entry *parent, const struct file_operations *proc_fops);
If this is where the problem lies, I am guessing it is better to try to fix the
Broadcom package/ wl_linux.c than the Linux 5.8.0-34 headers?
The information above, was prompted by:
sudo apt-get install --reinstall bcmwl-kernel-source
...
Building initial module for 5.8.0-34-generic
ERROR: Cannot create report: [Errno 17] File exists:
'/var/crash/bcmwl-kernel-source.0.crash'
Error! Bad return status for module build on kernel: 5.8.0-34-generic (x86_64)
Consult /var/lib/dkms/bcmwl/6.30.223.271+bdcom/build/make.log for more
information.
dpkg: error processing package bcmwl-kernel-source (--configure):
installed bcmwl-kernel-source package post-installation script subprocess
returned error exit status 10
Errors were encountered while processing:
bcmwl-kernel-source
E: Sub-process /usr/bin/dpkg returned an error code (1)
** Affects: broadcom-sta (Ubuntu)
Importance: Undecided
Status: New
** Tags: 5.8.0 6.30.223.271 bcmwl broadcom file operations ops proc
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https://bugs.launchpad.net/bugs/1910618
Title:
bcmwl 6.30.223.271+bdcom build fails with kernel 5.8.0-34
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