linux-stable.git/arch/powerpc/sysdev, branch v4.4.271

powerpc: sysdev: add missing iounmap() on error in mpic_msgr_probe()

2021-01-09T12:34:15+00:00

[ Upstream commit ffa1797040c5da391859a9556be7b735acbe1242 ]

I noticed that iounmap() of msgr_block_addr before return from
mpic_msgr_probe() in the error handling case is missing. So use
devm_ioremap() instead of just ioremap() when remapping the message
register block, so the mapping will be automatically released on
probe failure.

Signed-off-by: Qinglang Miao 
Signed-off-by: Michael Ellerman 
Link: https://lore.kernel.org/r/20201028091551.136400-1-miaoqinglang@huawei.com
Signed-off-by: Sasha Levin

powerpc/icp-hv: Fix missing of_node_put() in success path

2020-10-29T08:03:05+00:00

[ Upstream commit d3e669f31ec35856f5e85df9224ede5bdbf1bc7b ]

Both of_find_compatible_node() and of_find_node_by_type() will return
a refcounted node on success - thus for the success path the node must
be explicitly released with a of_node_put().

Fixes: 0b05ac6e2480 ("powerpc/xics: Rewrite XICS driver")
Signed-off-by: Nicholas Mc Guire 
Signed-off-by: Michael Ellerman 
Link: https://lore.kernel.org/r/1530691407-3991-1-git-send-email-hofrat@osadl.org
Signed-off-by: Sasha Levin

soc/fsl/qe: Fix an error code in qe_pin_request()

2020-01-29T09:21:42+00:00

[ Upstream commit 5674a92ca4b7e5a6a19231edd10298d30324cd27 ]

We forgot to set "err" on this error path.

Fixes: 1a2d397a6eb5 ("gpio/powerpc: Eliminate duplication of of_get_named_gpio_flags()")
Signed-off-by: Dan Carpenter 
Signed-off-by: Li Yang 
Signed-off-by: Sasha Levin

powerpc/4xx/uic: clear pending interrupt after irq type/pol change

2019-08-04T07:34:58+00:00

[ Upstream commit 3ab3a0689e74e6aa5b41360bc18861040ddef5b1 ]

When testing out gpio-keys with a button, a spurious
interrupt (and therefore a key press or release event)
gets triggered as soon as the driver enables the irq
line for the first time.

This patch clears any potential bogus generated interrupt
that was caused by the switching of the associated irq's
type and polarity.

Signed-off-by: Christian Lamparter 
Signed-off-by: Michael Ellerman 
Signed-off-by: Sasha Levin

powerpc: Fix size calculation using resource_size()

2018-09-15T07:40:39+00:00

[ Upstream commit c42d3be0c06f0c1c416054022aa535c08a1f9b39 ]

The problem is the the calculation should be "end - start + 1" but the
plus one is missing in this calculation.

Fixes: 8626816e905e ("powerpc: add support for MPIC message register API")
Signed-off-by: Dan Carpenter 
Reviewed-by: Tyrel Datwyler 
Signed-off-by: Michael Ellerman 
Signed-off-by: Sasha Levin 
Signed-off-by: Greg Kroah-Hartman

powerpc/mpic: Check if cpu_possible() in mpic_physmask()

2018-05-30T05:49:09+00:00

[ Upstream commit 0834d627fbea00c1444075eb3e448e1974da452d ]

In mpic_physmask() we loop over all CPUs up to 32, then get the hard
SMP processor id of that CPU.

Currently that's possibly walking off the end of the paca array, but
in a future patch we will change the paca array to be an array of
pointers, and in that case we will get a NULL for missing CPUs and
oops. eg:

  Unable to handle kernel paging request for data at address 0x88888888888888b8
  Faulting instruction address: 0xc00000000004e380
  Oops: Kernel access of bad area, sig: 11 [#1]
  ...
  NIP .mpic_set_affinity+0x60/0x1a0
  LR  .irq_do_set_affinity+0x48/0x100

Fix it by checking the CPU is possible, this also fixes the code if
there are gaps in the CPU numbering which probably never happens on
mpic systems but who knows.

Debugged-by: Nicholas Piggin 
Signed-off-by: Michael Ellerman 
Signed-off-by: Sasha Levin 
Signed-off-by: Greg Kroah-Hartman

powerpc/ipic: Fix status get and status clear

2017-12-20T09:04:58+00:00

[ Upstream commit 6b148a7ce72a7f87c81cbcde48af014abc0516a9 ]

IPIC Status is provided by register IPIC_SERSR and not by IPIC_SERMR
which is the mask register.

Signed-off-by: Christophe Leroy 
Signed-off-by: Michael Ellerman 
Signed-off-by: Sasha Levin 
Signed-off-by: Greg Kroah-Hartman

axonram: Fix gendisk handling

2017-12-16T09:33:53+00:00

[ Upstream commit 672a2c87c83649fb0167202342ce85af9a3b4f1c ]

It is invalid to call del_gendisk() when disk->queue is NULL. Fix error
handling in axon_ram_probe() to avoid doing that.

Also del_gendisk() does not drop a reference to gendisk allocated by
alloc_disk(). That has to be done by put_disk(). Add that call where
needed.

Reported-by: Dan Carpenter 
Signed-off-by: Jan Kara 
Signed-off-by: Jens Axboe 
Signed-off-by: Sasha Levin 
Signed-off-by: Greg Kroah-Hartman

Merge branch 'for-4.4/io-poll' of git://git.kernel.dk/linux-block

2015-11-11T01:23:49+00:00

Pull block IO poll support from Jens Axboe:
 "Various groups have been doing experimentation around IO polling for
  (really) fast devices.  The code has been reviewed and has been
  sitting on the side for a few releases, but this is now good enough
  for coordinated benchmarking and further experimentation.

  Currently O_DIRECT sync read/write are supported.  A framework is in
  the works that allows scalable stats tracking so we can auto-tune
  this.  And we'll add libaio support as well soon.  Fow now, it's an
  opt-in feature for test purposes"

* 'for-4.4/io-poll' of git://git.kernel.dk/linux-block:
  direct-io: be sure to assign dio->bio_bdev for both paths
  directio: add block polling support
  NVMe: add blk polling support
  block: add block polling support
  blk-mq: return tag/queue combo in the make_request_fn handlers
  block: change ->make_request_fn() and users to return a queue cookie

block: change ->make_request_fn() and users to return a queue cookie

2015-11-07T17:40:46+00:00

No functional changes in this patch, but it prepares us for returning
a more useful cookie related to the IO that was queued up.

Signed-off-by: Jens Axboe 
Acked-by: Christoph Hellwig 
Acked-by: Keith Busch