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Fix verbose logging messages in the rtl8192cu driver (rhbz 728740)

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This commit is contained in:
Josh Boyer 2012-01-13 13:18:41 -05:00
parent 3aa57a6105
commit 04ca5f9201
3 changed files with 306 additions and 1 deletions
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131
compat-wireless-rtl8192cu-Fix-WARNING-on-suspend-resume.patch Normal file
View File

@ -0,0 +1,131 @@
--- linux-2.6/drivers/net/wireless/rtlwifi/rtl8192c/fw_common.c
+++ linux-2.6/drivers/net/wireless/rtlwifi/rtl8192c/fw_common.c
@@ -265,7 +265,6 @@ int rtl92c_download_fw(struct ieee80211_
if (!rtlhal->pfirmware)
return 1;
- pr_info("Loading firmware file %s\n", rtlpriv->cfg->fw_name);
pfwheader = (struct rtl92c_firmware_header *)rtlhal->pfirmware;
pfwdata = (u8 *) rtlhal->pfirmware;
fwsize = rtlhal->fwsize;
--- linux-2.6/drivers/net/wireless/rtlwifi/rtl8192ce/sw.c
+++ linux-2.6/drivers/net/wireless/rtlwifi/rtl8192ce/sw.c
@@ -186,6 +186,7 @@ int rtl92c_init_sw_vars(struct ieee80211
memcpy(rtlpriv->rtlhal.pfirmware, firmware->data, firmware->size);
rtlpriv->rtlhal.fwsize = firmware->size;
release_firmware(firmware);
+ pr_info("rtl8192ce: Loaded firmware file %s\n", rtlpriv->cfg->fw_name);
return 0;
}
--- linux-2.6/drivers/net/wireless/rtlwifi/rtl8192cu/sw.c
+++ linux-2.6/drivers/net/wireless/rtlwifi/rtl8192cu/sw.c
@@ -43,6 +43,8 @@
#include "hw.h"
#include <linux/vmalloc.h>
#include <linux/module.h>
+#include <linux/atomic.h>
+#include <linux/types.h>
MODULE_AUTHOR("Georgia <georgia@realtek.com>");
MODULE_AUTHOR("Ziv Huang <ziv_huang@realtek.com>");
@@ -51,6 +53,10 @@ MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Realtek 8192C/8188C 802.11n USB wireless");
MODULE_FIRMWARE("rtlwifi/rtl8192cufw.bin");
+static char *rtl8192cu_firmware; /* pointer to firmware */
+static int firmware_size;
+static atomic_t usage_count;
+
static int rtl92cu_init_sw_vars(struct ieee80211_hw *hw)
{
struct rtl_priv *rtlpriv = rtl_priv(hw);
@@ -62,12 +68,21 @@ static int rtl92cu_init_sw_vars(struct i
rtlpriv->dm.disable_framebursting = false;
rtlpriv->dm.thermalvalue = 0;
rtlpriv->dbg.global_debuglevel = rtlpriv->cfg->mod_params->debug;
- rtlpriv->rtlhal.pfirmware = vmalloc(0x4000);
- if (!rtlpriv->rtlhal.pfirmware) {
+
+ if (rtl8192cu_firmware) {
+ /* firmware already loaded - true for suspend/resume
+ * and multiple instances of the device */
+ rtlpriv->rtlhal.pfirmware = rtl8192cu_firmware;
+ rtlpriv->rtlhal.fwsize = firmware_size;
+ return 0;
+ }
+ rtl8192cu_firmware = vzalloc(0x4000);
+ if (!rtl8192cu_firmware) {
RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG,
("Can't alloc buffer for fw.\n"));
return 1;
}
+
/* request fw */
err = request_firmware(&firmware, rtlpriv->cfg->fw_name,
rtlpriv->io.dev);
@@ -82,9 +97,14 @@ static int rtl92cu_init_sw_vars(struct i
release_firmware(firmware);
return 1;
}
- memcpy(rtlpriv->rtlhal.pfirmware, firmware->data, firmware->size);
+ pr_info("rtl8192cu: Loaded firmware from file %s\n",
+ rtlpriv->cfg->fw_name);
+ memcpy(rtl8192cu_firmware, firmware->data, firmware->size);
+ firmware_size = firmware->size;
rtlpriv->rtlhal.fwsize = firmware->size;
+ rtlpriv->rtlhal.pfirmware = rtl8192cu_firmware;
release_firmware(firmware);
+ atomic_inc(&usage_count);
return 0;
}
@@ -93,12 +113,30 @@ static void rtl92cu_deinit_sw_vars(struc
{
struct rtl_priv *rtlpriv = rtl_priv(hw);
- if (rtlpriv->rtlhal.pfirmware) {
- vfree(rtlpriv->rtlhal.pfirmware);
+ atomic_dec(&usage_count);
+ if (!atomic_read(&usage_count) && rtlpriv->rtlhal.pfirmware) {
+ vfree(rtl8192cu_firmware);
+ rtl8192cu_firmware = NULL;
rtlpriv->rtlhal.pfirmware = NULL;
}
}
+#ifdef CONFIG_PM_SLEEP
+static int rtl8192cu_usb_suspend(struct usb_interface *pusb_intf,
+ pm_message_t message)
+{
+ /* Increase usage_count to Save loaded fw across suspend/resume */
+ atomic_inc(&usage_count);
+ return 0;
+}
+
+static int rtl8192cu_usb_resume(struct usb_interface *pusb_intf)
+{
+ atomic_dec(&usage_count); /* after resume, decrease usage count */
+ return 0;
+}
+#endif
+
static struct rtl_hal_ops rtl8192cu_hal_ops = {
.init_sw_vars = rtl92cu_init_sw_vars,
.deinit_sw_vars = rtl92cu_deinit_sw_vars,
@@ -374,11 +412,10 @@ static struct usb_driver rtl8192cu_drive
.disconnect = rtl_usb_disconnect,
.id_table = rtl8192c_usb_ids,
-#ifdef CONFIG_PM
- /* .suspend = rtl_usb_suspend, */
- /* .resume = rtl_usb_resume, */
- /* .reset_resume = rtl8192c_resume, */
-#endif /* CONFIG_PM */
+#ifdef CONFIG_PM_SLEEP
+ .suspend = rtl8192cu_usb_suspend,
+ .resume = rtl8192cu_usb_resume,
+#endif /* CONFIG_PM_SLEEP */
#ifdef CONFIG_AUTOSUSPEND
.supports_autosuspend = 1,
#endif

13
kernel.spec
View File

@ -54,7 +54,7 @@ Summary: The Linux kernel
# For non-released -rc kernels, this will be appended after the rcX and
# gitX tags, so a 3 here would become part of release "0.rcX.gitX.3"
#
%global baserelease 2
%global baserelease 3
%global fedora_build %{baserelease}
# base_sublevel is the kernel version we're starting with and patching
@ -761,10 +761,14 @@ Patch21072: mac80211-fix-rx-key-NULL-ptr-deref-in-promiscuous-mode.patch
Patch21073: KVM-x86-extend-struct-x86_emulate_ops-with-get_cpuid.patch
Patch21074: KVM-x86-fix-missing-checks-in-syscall-emulation.patch
#rhbz 728740
Patch21076: rtl8192cu-Fix-WARNING-on-suspend-resume.patch
# compat-wireless patches
Patch50000: compat-wireless-config-fixups.patch
Patch50001: compat-wireless-pr_fmt-warning-avoidance.patch
Patch50002: compat-wireless-integrated-build.patch
Patch50003: compat-wireless-rtl8192cu-Fix-WARNING-on-suspend-resume.patch
%endif
@ -1475,6 +1479,9 @@ ApplyPatch mac80211-fix-rx-key-NULL-ptr-deref-in-promiscuous-mode.patch
ApplyPatch KVM-x86-extend-struct-x86_emulate_ops-with-get_cpuid.patch
ApplyPatch KVM-x86-fix-missing-checks-in-syscall-emulation.patch
#rhbz 728740
ApplyPatch rtl8192cu-Fix-WARNING-on-suspend-resume.patch
# END OF PATCH APPLICATIONS
%endif
@ -1540,6 +1547,7 @@ cd compat-wireless-%{cwversion}
ApplyPatch compat-wireless-config-fixups.patch
ApplyPatch compat-wireless-pr_fmt-warning-avoidance.patch
ApplyPatch compat-wireless-integrated-build.patch
ApplyPatch compat-wireless-rtl8192cu-Fix-WARNING-on-suspend-resume.patch
cd ..
@ -2309,6 +2317,9 @@ fi
# ||----w |
# || ||
%changelog
* Fri Jan 13 2012 Josh Boyer <jwboyer@redhat.com>
- Fix verbose logging messages in the rtl8192cu driver (rhbz 728740)
* Fri Jan 13 2012 Josh Boyer <jwboyer@redhat.com> 3.2.1-2
- CVE-2012-0045 kvm: syscall instruction induced guest panic (rhbz 773392)

163
rtl8192cu-Fix-WARNING-on-suspend-resume.patch Normal file
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@ -0,0 +1,163 @@
A recent LKML thread (http://lkml.indiana.edu/hypermail/linux/kernel/1112.3/00965.html)
discusses warnings that occur during a suspend/resume cycle. The driver
attempts to read the firmware file before userspace is ready, leading to the
following warning:
WARNING: at drivers/base/firmware_class.c:537 _request_firmware+0x3f6/0x420()
For rtl8192cu, the problem is fixed by storing the firmware in a global buffer
rather than one allocated per device. The usage count is increased when
suspending and decreased when resuming. This way, the firmware is retained
through a suspend/resume cycle, and does not have to be reread.
This patch should fix the bug reported in
https://bugzilla.redhat.com/show_bug.cgi?id=771002.
Note: This patch also touches rtl8192ce as the "firmware" loaded message
is now printed in the wrong place.
Note: This patch also touches rtl8192ce as the "firmware" loaded message
is now printed in the wrong place.
Reported-by: Mohammed Arafa <bugzilla@xxxxxxxxxxxx>
Reported-by: Dave Jones <davej@xxxxxxxxxx>
Signed-off-by: Larry Finger <Larry.Finger@xxxxxxxxxxxx>
Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Cc: Stable <stable@xxxxxxxxxxxxxxx>
---
drivers/net/wireless/rtlwifi/rtl8192c/fw_common.c | 1 -
drivers/net/wireless/rtlwifi/rtl8192ce/sw.c | 1 +
drivers/net/wireless/rtlwifi/rtl8192cu/sw.c | 58 +++++++++++++++++----
3 files changed, 49 insertions(+), 11 deletions(-)
--- linux-2.6/drivers/net/wireless/rtlwifi/rtl8192c/fw_common.c 2012-01-13 13:07:58.830625006 -0500
+++ linux-2.6/drivers/net/wireless/rtlwifi/rtl8192c/fw_common.c 2012-01-13 13:08:06.825439927 -0500
@@ -227,7 +227,6 @@ int rtl92c_download_fw(struct ieee80211_
u32 fwsize;
enum version_8192c version = rtlhal->version;
- pr_info("Loading firmware file %s\n", rtlpriv->cfg->fw_name);
if (!rtlhal->pfirmware)
return 1;
--- linux-2.6/drivers/net/wireless/rtlwifi/rtl8192ce/sw.c
+++ linux-2.6/drivers/net/wireless/rtlwifi/rtl8192ce/sw.c
@@ -186,6 +186,7 @@ int rtl92c_init_sw_vars(struct ieee80211
memcpy(rtlpriv->rtlhal.pfirmware, firmware->data, firmware->size);
rtlpriv->rtlhal.fwsize = firmware->size;
release_firmware(firmware);
+ pr_info("rtl8192ce: Loaded firmware file %s\n", rtlpriv->cfg->fw_name);
return 0;
}
--- linux-2.6/drivers/net/wireless/rtlwifi/rtl8192cu/sw.c
+++ linux-2.6/drivers/net/wireless/rtlwifi/rtl8192cu/sw.c
@@ -43,6 +43,8 @@
#include "hw.h"
#include <linux/vmalloc.h>
#include <linux/module.h>
+#include <linux/atomic.h>
+#include <linux/types.h>
MODULE_AUTHOR("Georgia <georgia@realtek.com>");
MODULE_AUTHOR("Ziv Huang <ziv_huang@realtek.com>");
@@ -51,6 +53,10 @@ MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Realtek 8192C/8188C 802.11n USB wireless");
MODULE_FIRMWARE("rtlwifi/rtl8192cufw.bin");
+static char *rtl8192cu_firmware; /* pointer to firmware */
+static int firmware_size;
+static atomic_t usage_count;
+
static int rtl92cu_init_sw_vars(struct ieee80211_hw *hw)
{
struct rtl_priv *rtlpriv = rtl_priv(hw);
@@ -62,12 +68,21 @@ static int rtl92cu_init_sw_vars(struct i
rtlpriv->dm.disable_framebursting = false;
rtlpriv->dm.thermalvalue = 0;
rtlpriv->dbg.global_debuglevel = rtlpriv->cfg->mod_params->debug;
- rtlpriv->rtlhal.pfirmware = vmalloc(0x4000);
- if (!rtlpriv->rtlhal.pfirmware) {
+
+ if (rtl8192cu_firmware) {
+ /* firmware already loaded - true for suspend/resume
+ * and multiple instances of the device */
+ rtlpriv->rtlhal.pfirmware = rtl8192cu_firmware;
+ rtlpriv->rtlhal.fwsize = firmware_size;
+ return 0;
+ }
+ rtl8192cu_firmware = vzalloc(0x4000);
+ if (!rtl8192cu_firmware) {
RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG,
("Can't alloc buffer for fw.\n"));
return 1;
}
+
/* request fw */
err = request_firmware(&firmware, rtlpriv->cfg->fw_name,
rtlpriv->io.dev);
@@ -82,9 +97,14 @@ static int rtl92cu_init_sw_vars(struct i
release_firmware(firmware);
return 1;
}
- memcpy(rtlpriv->rtlhal.pfirmware, firmware->data, firmware->size);
+ pr_info("rtl8192cu: Loaded firmware from file %s\n",
+ rtlpriv->cfg->fw_name);
+ memcpy(rtl8192cu_firmware, firmware->data, firmware->size);
+ firmware_size = firmware->size;
rtlpriv->rtlhal.fwsize = firmware->size;
+ rtlpriv->rtlhal.pfirmware = rtl8192cu_firmware;
release_firmware(firmware);
+ atomic_inc(&usage_count);
return 0;
}
@@ -93,12 +113,30 @@ static void rtl92cu_deinit_sw_vars(struc
{
struct rtl_priv *rtlpriv = rtl_priv(hw);
- if (rtlpriv->rtlhal.pfirmware) {
- vfree(rtlpriv->rtlhal.pfirmware);
+ atomic_dec(&usage_count);
+ if (!atomic_read(&usage_count) && rtlpriv->rtlhal.pfirmware) {
+ vfree(rtl8192cu_firmware);
+ rtl8192cu_firmware = NULL;
rtlpriv->rtlhal.pfirmware = NULL;
}
}
+#ifdef CONFIG_PM_SLEEP
+static int rtl8192cu_usb_suspend(struct usb_interface *pusb_intf,
+ pm_message_t message)
+{
+ /* Increase usage_count to Save loaded fw across suspend/resume */
+ atomic_inc(&usage_count);
+ return 0;
+}
+
+static int rtl8192cu_usb_resume(struct usb_interface *pusb_intf)
+{
+ atomic_dec(&usage_count); /* after resume, decrease usage count */
+ return 0;
+}
+#endif
+
static struct rtl_hal_ops rtl8192cu_hal_ops = {
.init_sw_vars = rtl92cu_init_sw_vars,
.deinit_sw_vars = rtl92cu_deinit_sw_vars,
@@ -374,11 +412,10 @@ static struct usb_driver rtl8192cu_drive
.disconnect = rtl_usb_disconnect,
.id_table = rtl8192c_usb_ids,
-#ifdef CONFIG_PM
- /* .suspend = rtl_usb_suspend, */
- /* .resume = rtl_usb_resume, */
- /* .reset_resume = rtl8192c_resume, */
-#endif /* CONFIG_PM */
+#ifdef CONFIG_PM_SLEEP
+ .suspend = rtl8192cu_usb_suspend,
+ .resume = rtl8192cu_usb_resume,
+#endif /* CONFIG_PM_SLEEP */
#ifdef CONFIG_AUTOSUSPEND
.supports_autosuspend = 1,
#endif