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void-packages/srcpkgs/broadcom-wl-dkms/patches/012-linux-5.10.patch

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https://gist.github.com/joanbm/5c640ac074d27fd1d82c74a5b67a1290
From f3d652840f8dd959395065a1cf67ca40b04ec69b Mon Sep 17 00:00:00 2001
From: Joan Bruguera <joanbrugueram@gmail.com>
Date: Tue, 13 Oct 2020 19:35:55 +0200
Subject: [PATCH] Get rid of get_fs/set_fs calls in Broadcom WL driver.
Tentative patch for broadcom-wl 6.30.223.271 driver for Linux 5.10 (tested -rc1 up to 5.10.1)
Applies on top of all the patches applied to broadcom-wl-dkms 6.30.223.271-23 on Arch Linux.
NB: Some checks in wlc_ioctl_internal are likely superfluous,
but I'm not familiar enough with the driver to remove them with confidence.
See also: https://lwn.net/Articles/722267/
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=47058bb54b57962b3958a936ddbc59355e4c5504
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=5e6e9852d6f76e01b2e6803c74258afa5b432bc5
Signed-off-by: Joan Bruguera <joanbrugueram@gmail.com>
---
src/wl/sys/wl_cfg80211_hybrid.c | 25 ++-------------------
src/wl/sys/wl_iw.c | 25 ++-------------------
src/wl/sys/wl_linux.c | 40 ++++++++++++++++++++++++++++-----
src/wl/sys/wl_linux.h | 2 ++
src/wl/sys/wlc_pub.h | 1 +
5 files changed, 42 insertions(+), 51 deletions(-)
--- a/src/wl/sys/wl_cfg80211_hybrid.c
+++ b/src/wl/sys/wl_cfg80211_hybrid.c
@@ -41,6 +41,7 @@
#include <wlioctl.h>
#include <proto/802.11.h>
#include <wl_cfg80211_hybrid.h>
+#include <wl_linux.h>
#define EVENT_TYPE(e) dtoh32((e)->event_type)
#define EVENT_FLAGS(e) dtoh16((e)->flags)
@@ -446,30 +447,8 @@ static void key_endian_to_host(struct wl
static s32
wl_dev_ioctl(struct net_device *dev, u32 cmd, void *arg, u32 len)
{
- struct ifreq ifr;
- struct wl_ioctl ioc;
- mm_segment_t fs;
- s32 err = 0;
-
BUG_ON(len < sizeof(int));
-
- memset(&ioc, 0, sizeof(ioc));
- ioc.cmd = cmd;
- ioc.buf = arg;
- ioc.len = len;
- strcpy(ifr.ifr_name, dev->name);
- ifr.ifr_data = (caddr_t)&ioc;
-
- fs = get_fs();
- set_fs(get_ds());
-#if defined(WL_USE_NETDEV_OPS)
- err = dev->netdev_ops->ndo_do_ioctl(dev, &ifr, SIOCDEVPRIVATE);
-#else
- err = dev->do_ioctl(dev, &ifr, SIOCDEVPRIVATE);
-#endif
- set_fs(fs);
-
- return err;
+ return wlc_ioctl_internal(dev, cmd, arg, len);
}
static s32
--- a/src/wl/sys/wl_iw.c
+++ b/src/wl/sys/wl_iw.c
@@ -37,6 +37,7 @@ typedef const struct si_pub si_t;
#include <wl_dbg.h>
#include <wl_iw.h>
+#include <wl_linux.h>
extern bool wl_iw_conn_status_str(uint32 event_type, uint32 status,
uint32 reason, char* stringBuf, uint buflen);
@@ -106,29 +107,7 @@ dev_wlc_ioctl(
int len
)
{
- struct ifreq ifr;
- wl_ioctl_t ioc;
- mm_segment_t fs;
- int ret;
-
- memset(&ioc, 0, sizeof(ioc));
- ioc.cmd = cmd;
- ioc.buf = arg;
- ioc.len = len;
-
- strcpy(ifr.ifr_name, dev->name);
- ifr.ifr_data = (caddr_t) &ioc;
-
- fs = get_fs();
- set_fs(get_ds());
-#if defined(WL_USE_NETDEV_OPS)
- ret = dev->netdev_ops->ndo_do_ioctl(dev, &ifr, SIOCDEVPRIVATE);
-#else
- ret = dev->do_ioctl(dev, &ifr, SIOCDEVPRIVATE);
-#endif
- set_fs(fs);
-
- return ret;
+ return wlc_ioctl_internal(dev, cmd, arg, len);
}
static int
--- a/src/wl/sys/wl_linux.c
+++ b/src/wl/sys/wl_linux.c
@@ -1650,10 +1650,7 @@ wl_ioctl(struct net_device *dev, struct
goto done2;
}
- if (segment_eq(get_fs(), KERNEL_DS))
- buf = ioc.buf;
-
- else if (ioc.buf) {
+ if (ioc.buf) {
if (!(buf = (void *) MALLOC(wl->osh, MAX(ioc.len, WLC_IOCTL_MAXLEN)))) {
bcmerror = BCME_NORESOURCE;
goto done2;
@@ -1674,7 +1671,7 @@ wl_ioctl(struct net_device *dev, struct
WL_UNLOCK(wl);
done1:
- if (ioc.buf && (ioc.buf != buf)) {
+ if (ioc.buf) {
if (copy_to_user(ioc.buf, buf, ioc.len))
bcmerror = BCME_BADADDR;
MFREE(wl->osh, buf, MAX(ioc.len, WLC_IOCTL_MAXLEN));
@@ -1684,6 +1681,39 @@ done2:
ASSERT(VALID_BCMERROR(bcmerror));
if (bcmerror != 0)
wl->pub->bcmerror = bcmerror;
+ return (OSL_ERROR(bcmerror));
+}
+
+int
+wlc_ioctl_internal(struct net_device *dev, int cmd, void *buf, int len)
+{
+ wl_info_t *wl;
+ wl_if_t *wlif;
+ int bcmerror;
+
+ if (!dev)
+ return -ENETDOWN;
+
+ wl = WL_INFO(dev);
+ wlif = WL_DEV_IF(dev);
+ if (wlif == NULL || wl == NULL || wl->dev == NULL)
+ return -ENETDOWN;
+
+ bcmerror = 0;
+
+ WL_TRACE(("wl%d: wlc_ioctl_internal: cmd 0x%x\n", wl->pub->unit, cmd));
+
+ WL_LOCK(wl);
+ if (!capable(CAP_NET_ADMIN)) {
+ bcmerror = BCME_EPERM;
+ } else {
+ bcmerror = wlc_ioctl(wl->wlc, cmd, buf, len, wlif->wlcif);
+ }
+ WL_UNLOCK(wl);
+
+ ASSERT(VALID_BCMERROR(bcmerror));
+ if (bcmerror != 0)
+ wl->pub->bcmerror = bcmerror;
return (OSL_ERROR(bcmerror));
}
--- a/src/wl/sys/wl_linux.h
+++ b/src/wl/sys/wl_linux.h
@@ -29,6 +29,7 @@
#define _wl_linux_h_
#include <wlc_types.h>
+#include <wlc_pub.h>
typedef struct wl_timer {
struct timer_list timer;
@@ -194,6 +195,7 @@ extern irqreturn_t wl_isr(int irq, void
extern int __devinit wl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
extern void wl_free(wl_info_t *wl);
extern int wl_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd);
+extern int wlc_ioctl_internal(struct net_device *dev, int cmd, void *buf, int len);
extern struct net_device * wl_netdev_get(wl_info_t *wl);
#endif
--- a/src/wl/sys/wlc_pub.h
+++ b/src/wl/sys/wlc_pub.h
@@ -24,6 +24,7 @@
#include <wlc_types.h>
#include <wlc_utils.h>
+#include <siutils.h>
#include "proto/802.11.h"
#include "proto/bcmevent.h"
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