linux-stable.git/drivers/parisc, branch linux-5.10.y

parisc: Do not reprogram affinitiy on ASP chip

2026-01-19T12:11:50+00:00

commit dca7da244349eef4d78527cafc0bf80816b261f5 upstream.

The ASP chip is a very old variant of the GSP chip and is used e.g. in
HP 730 workstations. When trying to reprogram the affinity it will crash
with a HPMC as the relevant registers don't seem to be at the usual
location.  Let's avoid the crash by checking the sversion. Also note,
that reprogramming isn't necessary either, as the HP730 is a just a
single-CPU machine.

Signed-off-by: Helge Deller 
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman

parisc: iosapic.c: Fix sparse warnings

2023-10-10T19:53:32+00:00

[ Upstream commit 927c6c8aa27c284a799b8c18784e37d3373af908 ]

Signed-off-by: Helge Deller 
Signed-off-by: Sasha Levin

parisc: led: Reduce CPU overhead for disk & lan LED computation

2023-09-19T10:20:24+00:00

commit 358ad816e52d4253b38c2f312e6b1cbd89e0dbf7 upstream.

Older PA-RISC machines have LEDs which show the disk- and LAN-activity.
The computation is done in software and takes quite some time, e.g. on a
J6500 this may take up to 60% time of one CPU if the machine is loaded
via network traffic.

Since most people don't care about the LEDs, start with LEDs disabled and
just show a CPU heartbeat LED. The disk and LAN LEDs can be turned on
manually via /proc/pdc/led.

Signed-off-by: Helge Deller 
Cc: 
Signed-off-by: Greg Kroah-Hartman

parisc: led: Fix potential null-ptr-deref in start_task()

2023-01-14T09:16:36+00:00

commit 41f563ab3c33698bdfc3403c7c2e6c94e73681e4 upstream.

start_task() calls create_singlethread_workqueue() and not checked the
ret value, which may return NULL. And a null-ptr-deref may happen:

start_task()
    create_singlethread_workqueue() # failed, led_wq is NULL
    queue_delayed_work()
        queue_delayed_work_on()
            __queue_delayed_work()  # warning here, but continue
                __queue_work()      # access wq->flags, null-ptr-deref

Check the ret value and return -ENOMEM if it is NULL.

Fixes: 3499495205a6 ("[PARISC] Use work queue in LED/LCD driver instead of tasklet.")
Signed-off-by: Shang XiaoJing 
Signed-off-by: Helge Deller 
Cc: 
Signed-off-by: Greg Kroah-Hartman

parisc: Export iosapic_serial_irq() symbol for serial port driver

2022-11-10T17:14:27+00:00

commit a0c9f1f2e53b8eb2ae43987a30e547ba56b4fa18 upstream.

The parisc serial port driver needs this symbol when it's compiled
as module.

Signed-off-by: Helge Deller 
Reported-by: kernel test robot 
Cc: 
Signed-off-by: Greg Kroah-Hartman

parisc: ccio-dma: Add missing iounmap in error path in ccio_probe()

2022-09-23T12:16:58+00:00

[ Upstream commit 38238be4e881a5d0abbe4872b4cd6ed790be06c8 ]

Add missing iounmap() before return from ccio_probe(), if ccio_init_resources()
fails.

Fixes: d46c742f827f ("parisc: ccio-dma: Handle kmalloc failure in ccio_init_resources()")
Signed-off-by: Yang Yingliang 
Signed-off-by: Helge Deller 
Signed-off-by: Sasha Levin

parisc: ccio-dma: Handle kmalloc failure in ccio_init_resources()

2022-09-15T09:32:03+00:00

[ Upstream commit d46c742f827fa2326ab1f4faa1cccadb56912341 ]

As the possible failure of the kmalloc(), it should be better
to fix this error path, check and return '-ENOMEM' error code.

Signed-off-by: Li Qiong 
Signed-off-by: Helge Deller 
Signed-off-by: Sasha Levin

parisc: Check the return value of ioremap() in lba_driver_probe()

2022-08-21T13:15:23+00:00

commit cf59f34d7f978d14d6520fd80a78a5ad5cb8abf8 upstream.

The function ioremap() in lba_driver_probe() can fail, so
its return value should be checked.

Fixes: 4bdc0d676a643 ("remove ioremap_nocache and devm_ioremap_nocache")
Reported-by: Hacash Robot 
Signed-off-by: William Dean 
Signed-off-by: Helge Deller 
Cc:  # v5.6+
Signed-off-by: Greg Kroah-Hartman

parisc: Fix CPU affinity for Lasi, WAX and Dino chips

2022-04-13T19:01:03+00:00

[ Upstream commit 939fc856676c266c3bc347c1c1661872a3725c0f ]

Add the missing logic to allow Lasi, WAX and Dino to set the
CPU affinity. This fixes IRQ migration to other CPUs when a
CPU is shutdown which currently holds the IRQs for one of those
chips.

Signed-off-by: Helge Deller 
Signed-off-by: Sasha Levin

parisc: Fix sglist access in ccio-dma.c

2022-02-23T11:00:57+00:00

commit d7da660cab47183cded65e11b64497d0f56c6edf upstream.

This patch implements the same bug fix to ccio-dma.c as to sba_iommu.c.
It ensures that only the allocated entries of the sglist are accessed.

Signed-off-by: John David Anglin 
Cc: stable@vger.kernel.org
Signed-off-by: Helge Deller 
Signed-off-by: Greg Kroah-Hartman