BCM270x: Add USB controller to Device Tree #993
Merged
Conversation
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Add Device Tree support to dwc_otg driver. Add device to Device Tree. Don't add platform devices when booting in DT mode. Tested on Pi1 and Pi2 with and without DT. Signed-off-by: Noralf Trønnes <noralf@tronnes.org>
|
Okay by me. @pelwell merge if you're happy. |
pelwell
added a commit
that referenced
this pull request
Jun 2, 2015
BCM270x: Add USB controller to Device Tree
popcornmix
pushed a commit
that referenced
this pull request
Sep 29, 2017
commit 39efc7c upstream. As the association status changes the driver needs to configure the hardware. This is done based on information in the "sta" acquired by ieee80211_find_sta(), which requires the caller to ensure that the "sta" is valid while its being used; generally by entering an rcu read section. But the operations acting on the "sta" has to communicate with the firmware and may therefor sleep, resulting in the following report: [ 31.418190] BUG: sleeping function called from invalid context at kernel/locking/mutex.c:238 [ 31.425919] in_atomic(): 0, irqs_disabled(): 0, pid: 34, name: kworker/u8:1 [ 31.434609] CPU: 0 PID: 34 Comm: kworker/u8:1 Tainted: G W 4.12.0-rc4-next-20170607+ #993 [ 31.441002] Hardware name: Qualcomm Technologies, Inc. APQ 8016 SBC (DT) [ 31.450380] Workqueue: phy0 ieee80211_iface_work [ 31.457226] Call trace: [ 31.461830] [<ffffff8008088c58>] dump_backtrace+0x0/0x260 [ 31.464004] [<ffffff8008088f7c>] show_stack+0x14/0x20 [ 31.469557] [<ffffff8008392e70>] dump_stack+0x98/0xb8 [ 31.474592] [<ffffff80080e4330>] ___might_sleep+0xf0/0x118 [ 31.479626] [<ffffff80080e43a8>] __might_sleep+0x50/0x88 [ 31.485010] [<ffffff80088ff9a4>] mutex_lock+0x24/0x60 [ 31.490479] [<ffffff8008595c38>] wcn36xx_smd_set_link_st+0x30/0x130 [ 31.495428] [<ffffff8008591ed8>] wcn36xx_bss_info_changed+0x148/0x448 [ 31.501504] [<ffffff80088ab3c4>] ieee80211_bss_info_change_notify+0xbc/0x118 [ 31.508102] [<ffffff80088f841c>] ieee80211_assoc_success+0x664/0x7f8 [ 31.515220] [<ffffff80088e13d4>] ieee80211_rx_mgmt_assoc_resp+0x144/0x2d8 [ 31.521555] [<ffffff80088e1e20>] ieee80211_sta_rx_queued_mgmt+0x190/0x698 [ 31.528239] [<ffffff80088bc44c>] ieee80211_iface_work+0x234/0x368 [ 31.535011] [<ffffff80080d81ac>] process_one_work+0x1cc/0x340 [ 31.541086] [<ffffff80080d8368>] worker_thread+0x48/0x430 [ 31.546814] [<ffffff80080de448>] kthread+0x108/0x138 [ 31.552195] [<ffffff8008082ec0>] ret_from_fork+0x10/0x50 In order to ensure that the "sta" remains alive (and consistent) for the duration of bss_info_changed() mutual exclusion has to be ensured with sta_remove(). This is done by introducing a mutex to cover firmware configuration changes, which is made to also ensure mutual exclusion between other operations changing the state or configuration of the firmware. With this we can drop the rcu read lock. Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org> Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
popcornmix
pushed a commit
that referenced
this pull request
Jul 9, 2018
This fixes an issue uncovered when a recent change to add the "page
table" flag was merged. During bootup we see many errors like the
following:
BUG: Bad page state in process mkdir pfn:00bae
page:c1ff15c0 count:0 mapcount:-1024 mapping:00000000 index:0x0
flags: 0x0()
raw: 00000000 00000000 00000000 fffffbff 00000000 00000100 00000200 00000000
page dumped because: nonzero mapcount
Modules linked in:
CPU: 0 PID: 46 Comm: mkdir Tainted: G B 4.17.0-simple-smp-07461-g1d40a5ea01d5-dirty #993
Call trace:
[<(ptrval)>] show_stack+0x44/0x54
[<(ptrval)>] dump_stack+0xb0/0xe8
[<(ptrval)>] bad_page+0x138/0x174
[<(ptrval)>] ? cpumask_next+0x24/0x34
[<(ptrval)>] free_pages_check_bad+0x6c/0xd0
[<(ptrval)>] free_pcppages_bulk+0x174/0x42c
[<(ptrval)>] free_unref_page_commit.isra.17+0xb8/0xc8
[<(ptrval)>] free_unref_page_list+0x10c/0x190
[<(ptrval)>] ? set_reset_devices+0x0/0x2c
[<(ptrval)>] release_pages+0x3a0/0x414
[<(ptrval)>] tlb_flush_mmu_free+0x5c/0x90
[<(ptrval)>] tlb_flush_mmu+0x90/0xa4
[<(ptrval)>] arch_tlb_finish_mmu+0x50/0x94
[<(ptrval)>] tlb_finish_mmu+0x30/0x64
[<(ptrval)>] exit_mmap+0x110/0x1e0
[<(ptrval)>] mmput+0x50/0xf0
[<(ptrval)>] do_exit+0x274/0xa94
[<(ptrval)>] do_group_exit+0x50/0x110
[<(ptrval)>] __wake_up_parent+0x0/0x38
[<(ptrval)>] _syscall_return+0x0/0x4
During the __pte_free_tlb path openrisc fails to call the page
destructor which would clear the new bits that were introduced.
To fix this we are calling the destructor.
It seem openrisc was the only architecture missing this, all other
architectures either call the destructor like we are doing here or use
pte_free.
Note: failing to call the destructor was also messing up the zone stats
(and will be cause other problems if you were using SPLIT_PTE_PTLOCKS,
which we are not yet).
Fixes: 1d40a5e ("mm: mark pages in use for page tables")
Acked-by: Matthew Wilcox <willy@infradead.org>
Signed-off-by: Stafford Horne <shorne@gmail.com>
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
Add Device Tree support to dwc_otg driver.
Add device to Device Tree.
Don't add platform devices when booting in DT mode.
Tested on Pi1 and Pi2 with and without DT.
Signed-off-by: Noralf Trønnes noralf@tronnes.org