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[PATCH 1/2] drm/simpledrm: Do not upcast in release helpers

by Thomas Zimmermann

The res pointer passed to simpledrm_device_release_clocks() and simpledrm_device_release_regulators() points to an instance of struct simpledrm_device. No need to upcast from struct drm_device. The upcast is harmless, as DRM device is the first field in struct simpledrm_device. Signed-off-by: Thomas Zimmermann <tzimmermann(a)suse.de> Fixes: 11e8f5fd223b ("drm: Add simpledrm driver") Cc: <stable(a)vger.kernel.org> # v5.14+ --- drivers/gpu/drm/sysfb/simpledrm.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/sysfb/simpledrm.c b/drivers/gpu/drm/sysfb/simpledrm.c index cfb1fe07704d7..78672422bcada 100644 --- a/drivers/gpu/drm/sysfb/simpledrm.c +++ b/drivers/gpu/drm/sysfb/simpledrm.c @@ -275,7 +275,7 @@ static struct simpledrm_device *simpledrm_device_of_dev(struct drm_device *dev) static void simpledrm_device_release_clocks(void *res) { - struct simpledrm_device *sdev = simpledrm_device_of_dev(res); + struct simpledrm_device *sdev = res; unsigned int i; for (i = 0; i < sdev->clk_count; ++i) { @@ -373,7 +373,7 @@ static int simpledrm_device_init_clocks(struct simpledrm_device *sdev) static void simpledrm_device_release_regulators(void *res) { - struct simpledrm_device *sdev = simpledrm_device_of_dev(res); + struct simpledrm_device *sdev = res; unsigned int i; for (i = 0; i < sdev->regulator_count; ++i) { -- 2.49.0

9 months

[PATCH v3 1/2] HID: amd_sfh: Fix SRA sensor when it's the only sensor

by Mario Limonciello

From: Mario Limonciello <mario.limonciello(a)amd.com> On systems that only have an SRA sensor connected to SFH the sensor doesn't get enabled due to a bad optimization condition of breaking the sensor walk loop. This optimization is unnecessary in the first place because if there is only one device then the loop only runs once. Drop the condition and explicitly mark sensor as enabled. Reported-by: Yijun Shen <Yijun.Shen(a)dell.com> Tested-By: Yijun Shen <Yijun_Shen(a)Dell.com> Fixes: d1c444b47100d ("HID: amd_sfh: Add support to export device operating states") Cc: stable(a)vger.kernel.org Signed-off-by: Mario Limonciello <mario.limonciello(a)amd.com> --- v2: * Add tag --- drivers/hid/amd-sfh-hid/sfh1_1/amd_sfh_init.c | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-) diff --git a/drivers/hid/amd-sfh-hid/sfh1_1/amd_sfh_init.c b/drivers/hid/amd-sfh-hid/sfh1_1/amd_sfh_init.c index 25f0ebfcbd5f5..c1bdf1e0d44af 100644 --- a/drivers/hid/amd-sfh-hid/sfh1_1/amd_sfh_init.c +++ b/drivers/hid/amd-sfh-hid/sfh1_1/amd_sfh_init.c @@ -134,9 +134,6 @@ static int amd_sfh1_1_hid_client_init(struct amd_mp2_dev *privdata) for (i = 0; i < cl_data->num_hid_devices; i++) { cl_data->sensor_sts[i] = SENSOR_DISABLED; - if (cl_data->num_hid_devices == 1 && cl_data->sensor_idx[0] == SRA_IDX) - break; - if (cl_data->sensor_idx[i] == SRA_IDX) { info.sensor_idx = cl_data->sensor_idx[i]; writel(0, privdata->mmio + amd_get_p2c_val(privdata, 0)); @@ -145,8 +142,10 @@ static int amd_sfh1_1_hid_client_init(struct amd_mp2_dev *privdata) (privdata, cl_data->sensor_idx[i], ENABLE_SENSOR); cl_data->sensor_sts[i] = (status == 0) ? SENSOR_ENABLED : SENSOR_DISABLED; - if (cl_data->sensor_sts[i] == SENSOR_ENABLED) + if (cl_data->sensor_sts[i] == SENSOR_ENABLED) { + cl_data->is_any_sensor_enabled = true; privdata->dev_en.is_sra_present = true; + } continue; } -- 2.43.0

9 months

[PATCH 1/1] x86/cpu/topology: Don't limit CPUs to 1 for Xen PV guests due to disabled APIC

by Petr Vaněk

Xen PV guests in DomU have APIC disabled by design, which causes topology_apply_cmdline_limits_early() to limit the number of possible CPUs to 1, regardless of the configured number of vCPUs. This is a regression introduced in version 6.9 in commit 7c0edad3643f ("x86/cpu/topology: Rework possible CPU management") which added an early check that limits CPUs if apic_is_disabled, without accounting for the fact that Xen PV guests always disable APIC even when SMP is supported. This patch fixes the issue by skipping the apic_is_disabled check for Xen PV guests, allowing them to boot with the full set of configured vCPUs. Fixes: 7c0edad3643f ("x86/cpu/topology: Rework possible CPU management") Cc: Thomas Gleixner <tglx(a)linutronix.de> Cc: x86(a)kernel.org Cc: xen-devel(a)lists.xenproject.org Cc: stable(a)vger.kernel.org # 6.9+ Signed-off-by: Petr Vaněk <arkamar(a)atlas.cz> --- arch/x86/kernel/cpu/topology.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/arch/x86/kernel/cpu/topology.c b/arch/x86/kernel/cpu/topology.c index 01456236a6dd..10aa7f471ec9 100644 --- a/arch/x86/kernel/cpu/topology.c +++ b/arch/x86/kernel/cpu/topology.c @@ -428,8 +428,13 @@ void __init topology_apply_cmdline_limits_early(void) { unsigned int possible = nr_cpu_ids; - /* 'maxcpus=0' 'nosmp' 'nolapic' */ - if (!setup_max_cpus || apic_is_disabled) + /* 'maxcpus=0' 'nosmp' 'nolapic' + * + * The apic_is_disabled check is ignored for Xen PV domains because Xen + * disables ACPI in unprivileged PV DomU guests, which would otherwise limit + * CPUs to 1, even if multiple vCPUs were configured. + */ + if (!setup_max_cpus || (!xen_pv_domain() && apic_is_disabled)) possible = 1; /* 'possible_cpus=N' */ -- 2.48.1

9 months

[PATCH v7] KEYS: Add a list for unreferenced keys

by Jarkko Sakkinen

From: Jarkko Sakkinen <jarkko.sakkinen(a)opinsys.com> Add an isolated list of unreferenced keys to be queued for deletion, and try to pin the keys in the garbage collector before processing anything. Skip unpinnable keys. Use this list for blocking the reaping process during the teardown: 1. First off, the keys added to `keys_graveyard` are snapshotted, and the list is flushed. This the very last step in `key_put()`. 2. `key_put()` reaches zero. This will mark key as busy for the garbage collector. 3. `key_garbage_collector()` will try to increase refcount, which won't go above zero. Whenever this happens, the key will be skipped. Cc: stable(a)vger.kernel.org # v6.1+ Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen(a)opinsys.com> --- v7: - Fixed multiple definitions (from rebasing, sorry). v6: - Rebase went wrong in v5. v5: - Rebased on top of v6.15-rc - Updated commit message to explain how spin lock and refcount isolate the time window in key_put(). v4: - Pin the key while processing key type teardown. Skip dead keys. - Revert key_gc_graveyard back key_gc_unused_keys. - Rewrote the commit message. - "unsigned long flags" declaration somehow did make to the previous patch (sorry). v3: - Using spin_lock() fails since key_put() is executed inside IRQs. Using spin_lock_irqsave() would neither work given the lock is acquired for /proc/keys. Therefore, separate the lock for graveyard and key_graveyard before reaping key_serial_tree. v2: - Rename key_gc_unused_keys as key_gc_graveyard, and re-document the function. --- include/linux/key.h | 7 ++----- security/keys/gc.c | 40 ++++++++++++++++++++++++---------------- security/keys/internal.h | 5 +++++ security/keys/key.c | 7 +++++-- 4 files changed, 36 insertions(+), 23 deletions(-) diff --git a/include/linux/key.h b/include/linux/key.h index ba05de8579ec..c50659184bdf 100644 --- a/include/linux/key.h +++ b/include/linux/key.h @@ -195,10 +195,8 @@ enum key_state { struct key { refcount_t usage; /* number of references */ key_serial_t serial; /* key serial number */ - union { - struct list_head graveyard_link; - struct rb_node serial_node; - }; + struct list_head graveyard_link; /* key->usage == 0 */ + struct rb_node serial_node; #ifdef CONFIG_KEY_NOTIFICATIONS struct watch_list *watchers; /* Entities watching this key for changes */ #endif @@ -236,7 +234,6 @@ struct key { #define KEY_FLAG_ROOT_CAN_INVAL 7 /* set if key can be invalidated by root without permission */ #define KEY_FLAG_KEEP 8 /* set if key should not be removed */ #define KEY_FLAG_UID_KEYRING 9 /* set if key is a user or user session keyring */ -#define KEY_FLAG_FINAL_PUT 10 /* set if final put has happened on key */ /* the key type and key description string * - the desc is used to match a key against search criteria diff --git a/security/keys/gc.c b/security/keys/gc.c index f27223ea4578..0a3beb68633c 100644 --- a/security/keys/gc.c +++ b/security/keys/gc.c @@ -189,6 +189,7 @@ static void key_garbage_collector(struct work_struct *work) struct rb_node *cursor; struct key *key; time64_t new_timer, limit, expiry; + unsigned long flags; kenter("[%lx,%x]", key_gc_flags, gc_state); @@ -206,21 +207,35 @@ static void key_garbage_collector(struct work_struct *work) new_timer = TIME64_MAX; + spin_lock_irqsave(&key_graveyard_lock, flags); + list_splice_init(&key_graveyard, &graveyard); + spin_unlock_irqrestore(&key_graveyard_lock, flags); + + list_for_each_entry(key, &graveyard, graveyard_link) { + spin_lock(&key_serial_lock); + kdebug("unrefd key %d", key->serial); + rb_erase(&key->serial_node, &key_serial_tree); + spin_unlock(&key_serial_lock); + } + /* As only this function is permitted to remove things from the key * serial tree, if cursor is non-NULL then it will always point to a * valid node in the tree - even if lock got dropped. */ spin_lock(&key_serial_lock); + key = NULL; cursor = rb_first(&key_serial_tree); continue_scanning: + key_put(key); while (cursor) { key = rb_entry(cursor, struct key, serial_node); cursor = rb_next(cursor); - - if (test_bit(KEY_FLAG_FINAL_PUT, &key->flags)) { - smp_mb(); /* Clobber key->user after FINAL_PUT seen. */ - goto found_unreferenced_key; + /* key_get(), unless zero: */ + if (!refcount_inc_not_zero(&key->usage)) { + key = NULL; + gc_state |= KEY_GC_REAP_AGAIN; + goto skip_dead_key; } if (unlikely(gc_state & KEY_GC_REAPING_DEAD_1)) { @@ -274,6 +289,7 @@ static void key_garbage_collector(struct work_struct *work) spin_lock(&key_serial_lock); goto continue_scanning; } + key_put(key); /* We've completed the pass. Set the timer if we need to and queue a * new cycle if necessary. We keep executing cycles until we find one @@ -286,6 +302,10 @@ static void key_garbage_collector(struct work_struct *work) key_schedule_gc(new_timer); } + spin_lock(&key_graveyard_lock); + list_splice_init(&key_graveyard, &graveyard); + spin_unlock(&key_graveyard_lock); + if (unlikely(gc_state & KEY_GC_REAPING_DEAD_2) || !list_empty(&graveyard)) { /* Make sure that all pending keyring payload destructions are @@ -328,18 +348,6 @@ static void key_garbage_collector(struct work_struct *work) kleave(" [end %x]", gc_state); return; - /* We found an unreferenced key - once we've removed it from the tree, - * we can safely drop the lock. - */ -found_unreferenced_key: - kdebug("unrefd key %d", key->serial); - rb_erase(&key->serial_node, &key_serial_tree); - spin_unlock(&key_serial_lock); - - list_add_tail(&key->graveyard_link, &graveyard); - gc_state |= KEY_GC_REAP_AGAIN; - goto maybe_resched; - /* We found a restricted keyring and need to update the restriction if * it is associated with the dead key type. */ diff --git a/security/keys/internal.h b/security/keys/internal.h index 2cffa6dc8255..4e3d9b322390 100644 --- a/security/keys/internal.h +++ b/security/keys/internal.h @@ -63,9 +63,14 @@ struct key_user { int qnbytes; /* number of bytes allocated to this user */ }; +extern struct list_head key_graveyard; +extern spinlock_t key_graveyard_lock; + extern struct rb_root key_user_tree; extern spinlock_t key_user_lock; extern struct key_user root_key_user; +extern struct list_head key_graveyard; +extern spinlock_t key_graveyard_lock; extern struct key_user *key_user_lookup(kuid_t uid); extern void key_user_put(struct key_user *user); diff --git a/security/keys/key.c b/security/keys/key.c index 7198cd2ac3a3..7511f2017b6b 100644 --- a/security/keys/key.c +++ b/security/keys/key.c @@ -22,6 +22,8 @@ DEFINE_SPINLOCK(key_serial_lock); struct rb_root key_user_tree; /* tree of quota records indexed by UID */ DEFINE_SPINLOCK(key_user_lock); +LIST_HEAD(key_graveyard); +DEFINE_SPINLOCK(key_graveyard_lock); unsigned int key_quota_root_maxkeys = 1000000; /* root's key count quota */ unsigned int key_quota_root_maxbytes = 25000000; /* root's key space quota */ @@ -658,8 +660,9 @@ void key_put(struct key *key) key->user->qnbytes -= key->quotalen; spin_unlock_irqrestore(&key->user->lock, flags); } - smp_mb(); /* key->user before FINAL_PUT set. */ - set_bit(KEY_FLAG_FINAL_PUT, &key->flags); + spin_lock_irqsave(&key_graveyard_lock, flags); + list_add_tail(&key->graveyard_link, &key_graveyard); + spin_unlock_irqrestore(&key_graveyard_lock, flags); schedule_work(&key_gc_work); } } -- 2.39.5

9 months

[PATCH v6] staging: rtl8723bs: Add error handling for sd_read()

by Wentao Liang

The sdio_read32() calls sd_read(), but does not handle the error if sd_read() fails. This could lead to subsequent operations processing invalid data. A proper implementation can be found in sdio_readN(). Add error handling for the sd_read() to free tmpbuf and return error code if sd_read() fails. This ensure that the memcpy() is only performed when the read operation is successful. Fixes: 554c0a3abf21 ("staging: Add rtl8723bs sdio wifi driver") Cc: stable(a)vger.kernel.org # v4.12+ Signed-off-by: Wentao Liang <vulab(a)iscas.ac.cn> --- v6: Fix improper code to propagate error code v5: Fix error code v4: Add change log and fix error code v3: Add Cc flag v2: Change code to initialize val drivers/staging/rtl8723bs/hal/sdio_ops.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/staging/rtl8723bs/hal/sdio_ops.c b/drivers/staging/rtl8723bs/hal/sdio_ops.c index 21e9f1858745..eb21c7e55949 100644 --- a/drivers/staging/rtl8723bs/hal/sdio_ops.c +++ b/drivers/staging/rtl8723bs/hal/sdio_ops.c @@ -185,7 +185,12 @@ static u32 sdio_read32(struct intf_hdl *intfhdl, u32 addr) return SDIO_ERR_VAL32; ftaddr &= ~(u16)0x3; - sd_read(intfhdl, ftaddr, 8, tmpbuf); + err = sd_read(intfhdl, ftaddr, 8, tmpbuf); + if (err) { + kfree(tmpbuf); + return (u32)err; + } + memcpy(&le_tmp, tmpbuf + shift, 4); val = le32_to_cpu(le_tmp); -- 2.42.0.windows.2

9 months

[PATCH 1/2] drm/i915: Schedule the HPD poll init work on an unbound workqueue

by Imre Deak

Disabling HPD polling from i915_hpd_poll_init_work() involves probing all display connectors explicitly to account for lost hotplug interrupts. On some platforms (mostly pre-ICL) with HDMI connectors the I2C EDID bit-banging using udelay() triggers in turn the workqueue: i915_hpd_poll_init_work [i915] hogged CPU for >10000us 4 times, consider switching to WQ_UNBOUND warning. Fix the above by scheduling i915_hpd_poll_init_work() on a WQ_UNBOUND workqueue. It's ok to use a system WQ, since i915_hpd_poll_init_work() is properly flushed in intel_hpd_cancel_work(). The connector probing from drm_mode_config::output_poll_work resulting in the same warning is fixed by the next patch. Cc: Tejun Heo <tj(a)kernel.org> Cc: Heiner Kallweit <hkallweit1(a)gmail.com> CC: stable(a)vger.kernel.org # 6.5 Suggested-by: Tejun Heo <tj(a)kernel.org> Suggested-by: Heiner Kallweit <hkallweit1(a)gmail.com> Reported-by: Heiner Kallweit <hkallweit1(a)gmail.com> Closes: https://gitlab.freedesktop.org/drm/intel/-/issues/9245 Link: https://lore.kernel.org/all/f7e21caa-e98d-e5b5-932a-fe12d27fde9b@gmail.com Signed-off-by: Imre Deak <imre.deak(a)intel.com> --- drivers/gpu/drm/i915/display/intel_hotplug.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/i915/display/intel_hotplug.c b/drivers/gpu/drm/i915/display/intel_hotplug.c index e8562f6f8bb44..accc2fec562a0 100644 --- a/drivers/gpu/drm/i915/display/intel_hotplug.c +++ b/drivers/gpu/drm/i915/display/intel_hotplug.c @@ -774,7 +774,7 @@ void intel_hpd_poll_enable(struct drm_i915_private *dev_priv) * As well, there's no issue if we race here since we always reschedule * this worker anyway */ - queue_work(dev_priv->unordered_wq, + queue_work(system_unbound_wq, &dev_priv->display.hotplug.poll_init_work); } @@ -803,7 +803,7 @@ void intel_hpd_poll_disable(struct drm_i915_private *dev_priv) return; WRITE_ONCE(dev_priv->display.hotplug.poll_enabled, false); - queue_work(dev_priv->unordered_wq, + queue_work(system_unbound_wq, &dev_priv->display.hotplug.poll_init_work); } -- 2.37.2

9 months

[PATCH] platform/x86: thinkpad-acpi: Add error handling for tpacpi_check_quirks

by Wentao Liang

In tpacpi_battery_init(), the return value of tpacpi_check_quirks() needs to be checked. The battery should not be hooked if there is no matched battery information in quirk table. Add an error check and return -ENODEV immediately if the device fail the check. Fixes: 1a32ebb26ba9 ("platform/x86: thinkpad_acpi: Support battery quirk") Cc: stable(a)vger.kernel.org Signed-off-by: Wentao Liang <vulab(a)iscas.ac.cn> --- drivers/platform/x86/thinkpad_acpi.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c index 2cfb2ac3f465..a3227f60aa43 100644 --- a/drivers/platform/x86/thinkpad_acpi.c +++ b/drivers/platform/x86/thinkpad_acpi.c @@ -9969,11 +9969,15 @@ static const struct tpacpi_quirk battery_quirk_table[] __initconst = { static int __init tpacpi_battery_init(struct ibm_init_struct *ibm) { + unsigned long r; + memset(&battery_info, 0, sizeof(battery_info)); - tp_features.battery_force_primary = tpacpi_check_quirks( + r = tp_features.battery_force_primary = tpacpi_check_quirks( battery_quirk_table, ARRAY_SIZE(battery_quirk_table)); + if (!r) + return -ENODEV; battery_hook_register(&battery_hook); return 0; -- 2.42.0.windows.2

9 months

[PATCH 5.15.y 0/1] Manual Backport of 099606a7b2d5 to 5.15

by Harshvardhan Jha

The patch 099606a7b2d5 didn't cleanly apply to 5.15 due to the significant difference in codebases. I've tried to manually bring it back to 5.15 via some minor conflict resolution but also invoking the newly introduced API using inverted logic as the conditional statements present in 5.15 are the opposite of those in 6.1 xen/swiotlib. Harshvardhan Jha (1): xen/swiotlb: relax alignment requirements drivers/xen/swiotlb-xen.c | 18 +++++++++++------- 1 file changed, 11 insertions(+), 7 deletions(-) -- 2.47.1

9 months

[PATCH v2 1/1] phy: tegra: xusb: Use a bitmask for UTMI pad power state tracking

by Wayne Chang

The current implementation uses bias_pad_enable as a reference count to manage the shared bias pad for all UTMI PHYs. However, during system suspension with connected USB devices, multiple power-down requests for the UTMI pad result in a mismatch in the reference count, which in turn produces warnings such as: [ 237.762967] WARNING: CPU: 10 PID: 1618 at tegra186_utmi_pad_power_down+0x160/0x170 [ 237.763103] Call trace: [ 237.763104] tegra186_utmi_pad_power_down+0x160/0x170 [ 237.763107] tegra186_utmi_phy_power_off+0x10/0x30 [ 237.763110] phy_power_off+0x48/0x100 [ 237.763113] tegra_xusb_enter_elpg+0x204/0x500 [ 237.763119] tegra_xusb_suspend+0x48/0x140 [ 237.763122] platform_pm_suspend+0x2c/0xb0 [ 237.763125] dpm_run_callback.isra.0+0x20/0xa0 [ 237.763127] __device_suspend+0x118/0x330 [ 237.763129] dpm_suspend+0x10c/0x1f0 [ 237.763130] dpm_suspend_start+0x88/0xb0 [ 237.763132] suspend_devices_and_enter+0x120/0x500 [ 237.763135] pm_suspend+0x1ec/0x270 The root cause was traced back to the dynamic power-down changes introduced in commit a30951d31b25 ("xhci: tegra: USB2 pad power controls"), where the UTMI pad was being powered down without verifying its current state. This unbalanced behavior led to discrepancies in the reference count. To rectify this issue, this patch replaces the single reference counter with a bitmask, renamed to utmi_pad_enabled. Each bit in the mask corresponds to one of the four USB2 PHYs, allowing us to track each pad's enablement status individually. With this change: - The bias pad is powered on only when the mask is clear. - Each UTMI pad is powered on or down based on its corresponding bit in the mask, preventing redundant operations. - The overall power state of the shared bias pad is maintained correctly during suspend/resume cycles. Cc: stable(a)vger.kernel.org Fixes: a30951d31b25 ("xhci: tegra: USB2 pad power controls") Signed-off-by: Wayne Chang <waynec(a)nvidia.com> --- V1 -> V2: holding the padctl->lock to protect shared bitmask drivers/phy/tegra/xusb-tegra186.c | 44 +++++++++++++++++++------------ 1 file changed, 27 insertions(+), 17 deletions(-) diff --git a/drivers/phy/tegra/xusb-tegra186.c b/drivers/phy/tegra/xusb-tegra186.c index fae6242aa730..cc7b8a6a999f 100644 --- a/drivers/phy/tegra/xusb-tegra186.c +++ b/drivers/phy/tegra/xusb-tegra186.c @@ -237,6 +237,8 @@ #define DATA0_VAL_PD BIT(1) #define USE_XUSB_AO BIT(4) +#define TEGRA_UTMI_PAD_MAX 4 + #define TEGRA186_LANE(_name, _offset, _shift, _mask, _type) \ { \ .name = _name, \ @@ -269,7 +271,7 @@ struct tegra186_xusb_padctl { /* UTMI bias and tracking */ struct clk *usb2_trk_clk; - unsigned int bias_pad_enable; + DECLARE_BITMAP(utmi_pad_enabled, TEGRA_UTMI_PAD_MAX); /* padctl context */ struct tegra186_xusb_padctl_context context; @@ -603,12 +605,8 @@ static void tegra186_utmi_bias_pad_power_on(struct tegra_xusb_padctl *padctl) u32 value; int err; - mutex_lock(&padctl->lock); - - if (priv->bias_pad_enable++ > 0) { - mutex_unlock(&padctl->lock); + if (!bitmap_empty(priv->utmi_pad_enabled, TEGRA_UTMI_PAD_MAX)) return; - } err = clk_prepare_enable(priv->usb2_trk_clk); if (err < 0) @@ -667,17 +665,8 @@ static void tegra186_utmi_bias_pad_power_off(struct tegra_xusb_padctl *padctl) struct tegra186_xusb_padctl *priv = to_tegra186_xusb_padctl(padctl); u32 value; - mutex_lock(&padctl->lock); - - if (WARN_ON(priv->bias_pad_enable == 0)) { - mutex_unlock(&padctl->lock); - return; - } - - if (--priv->bias_pad_enable > 0) { - mutex_unlock(&padctl->lock); + if (!bitmap_empty(priv->utmi_pad_enabled, TEGRA_UTMI_PAD_MAX)) return; - } value = padctl_readl(padctl, XUSB_PADCTL_USB2_BIAS_PAD_CTL1); value |= USB2_PD_TRK; @@ -690,13 +679,13 @@ static void tegra186_utmi_bias_pad_power_off(struct tegra_xusb_padctl *padctl) clk_disable_unprepare(priv->usb2_trk_clk); } - mutex_unlock(&padctl->lock); } static void tegra186_utmi_pad_power_on(struct phy *phy) { struct tegra_xusb_lane *lane = phy_get_drvdata(phy); struct tegra_xusb_padctl *padctl = lane->pad->padctl; + struct tegra186_xusb_padctl *priv = to_tegra186_xusb_padctl(padctl); struct tegra_xusb_usb2_port *port; struct device *dev = padctl->dev; unsigned int index = lane->index; @@ -705,9 +694,16 @@ static void tegra186_utmi_pad_power_on(struct phy *phy) if (!phy) return; + mutex_lock(&padctl->lock); + if (test_bit(index, priv->utmi_pad_enabled)) { + mutex_unlock(&padctl->lock); + return; + } + port = tegra_xusb_find_usb2_port(padctl, index); if (!port) { dev_err(dev, "no port found for USB2 lane %u\n", index); + mutex_unlock(&padctl->lock); return; } @@ -724,18 +720,28 @@ static void tegra186_utmi_pad_power_on(struct phy *phy) value = padctl_readl(padctl, XUSB_PADCTL_USB2_OTG_PADX_CTL1(index)); value &= ~USB2_OTG_PD_DR; padctl_writel(padctl, value, XUSB_PADCTL_USB2_OTG_PADX_CTL1(index)); + + set_bit(index, priv->utmi_pad_enabled); + mutex_unlock(&padctl->lock); } static void tegra186_utmi_pad_power_down(struct phy *phy) { struct tegra_xusb_lane *lane = phy_get_drvdata(phy); struct tegra_xusb_padctl *padctl = lane->pad->padctl; + struct tegra186_xusb_padctl *priv = to_tegra186_xusb_padctl(padctl); unsigned int index = lane->index; u32 value; if (!phy) return; + mutex_lock(&padctl->lock); + if (!test_bit(index, priv->utmi_pad_enabled)) { + mutex_unlock(&padctl->lock); + return; + } + dev_dbg(padctl->dev, "power down UTMI pad %u\n", index); value = padctl_readl(padctl, XUSB_PADCTL_USB2_OTG_PADX_CTL0(index)); @@ -748,7 +754,11 @@ static void tegra186_utmi_pad_power_down(struct phy *phy) udelay(2); + clear_bit(index, priv->utmi_pad_enabled); + tegra186_utmi_bias_pad_power_off(padctl); + + mutex_unlock(&padctl->lock); } static int tegra186_xusb_padctl_vbus_override(struct tegra_xusb_padctl *padctl, -- 2.25.1

9 months, 1 week

[PATCH 6.1.y] net/sched: act_mirred: don't override retval if we already lost the skb

by jianqi.ren.cn＠windriver.com

From: Jakub Kicinski <kuba(a)kernel.org> [ Upstream commit 166c2c8a6a4dc2e4ceba9e10cfe81c3e469e3210 ] If we're redirecting the skb, and haven't called tcf_mirred_forward(), yet, we need to tell the core to drop the skb by setting the retcode to SHOT. If we have called tcf_mirred_forward(), however, the skb is out of our hands and returning SHOT will lead to UaF. Move the retval override to the error path which actually need it. Reviewed-by: Michal Swiatkowski <michal.swiatkowski(a)linux.intel.com> Fixes: e5cf1baf92cb ("act_mirred: use TC_ACT_REINSERT when possible") Signed-off-by: Jakub Kicinski <kuba(a)kernel.org> Acked-by: Jamal Hadi Salim <jhs(a)mojatatu.com> Signed-off-by: David S. Miller <davem(a)davemloft.net> [Minor conflict resolved due to code context change.] Signed-off-by: Jianqi Ren <jianqi.ren.cn(a)windriver.com> Signed-off-by: He Zhe <zhe.he(a)windriver.com> --- Verified the build test --- net/sched/act_mirred.c | 20 ++++++++++++-------- 1 file changed, 12 insertions(+), 8 deletions(-) diff --git a/net/sched/act_mirred.c b/net/sched/act_mirred.c index 36395e5db3b4..df64acc8acde 100644 --- a/net/sched/act_mirred.c +++ b/net/sched/act_mirred.c @@ -259,13 +259,13 @@ static int tcf_mirred_act(struct sk_buff *skb, const struct tc_action *a, dev = rcu_dereference_bh(m->tcfm_dev); if (unlikely(!dev)) { pr_notice_once("tc mirred: target device is gone\n"); - goto out; + goto err_cant_do; } if (unlikely(!(dev->flags & IFF_UP)) || !netif_carrier_ok(dev)) { net_notice_ratelimited("tc mirred to Houston: device %s is down\n", dev->name); - goto out; + goto err_cant_do; } /* we could easily avoid the clone only if called by ingress and clsact; @@ -279,7 +279,7 @@ static int tcf_mirred_act(struct sk_buff *skb, const struct tc_action *a, if (!use_reinsert) { skb2 = skb_clone(skb, GFP_ATOMIC); if (!skb2) - goto out; + goto err_cant_do; } want_ingress = tcf_mirred_act_wants_ingress(m_eaction); @@ -321,12 +321,16 @@ static int tcf_mirred_act(struct sk_buff *skb, const struct tc_action *a, } err = tcf_mirred_forward(want_ingress, skb2); - if (err) { -out: + if (err) tcf_action_inc_overlimit_qstats(&m->common); - if (tcf_mirred_is_act_redirect(m_eaction)) - retval = TC_ACT_SHOT; - } + __this_cpu_dec(mirred_nest_level); + + return retval; + +err_cant_do: + if (is_redirect) + retval = TC_ACT_SHOT; + tcf_action_inc_overlimit_qstats(&m->common); __this_cpu_dec(mirred_nest_level); return retval; -- 2.34.1

9 months, 1 week

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