linux-stable.git/drivers/parisc, branch linux-6.3.y

parisc: Replace regular spinlock with spin_trylock on panic path

2023-05-24T16:30:12+00:00

[ Upstream commit 829632dae8321787525ee37dc4828bbe6edafdae ]

The panic notifiers' callbacks execute in an atomic context, with
interrupts/preemption disabled, and all CPUs not running the panic
function are off, so it's very dangerous to wait on a regular
spinlock, there's a risk of deadlock.

Refactor the panic notifier of parisc/power driver to make use
of spin_trylock - for that, we've added a second version of the
soft-power function. Also, some comments were reorganized and
trailing white spaces, useless header inclusion and blank lines
were removed.

Cc: "James E.J. Bottomley" 
Cc: Jeroen Roovers 
Acked-by: Helge Deller  # parisc
Signed-off-by: Guilherme G. Piccoli 
Signed-off-by: Helge Deller 
Signed-off-by: Sasha Levin

parisc: pdc_stable: use strscpy() to instead of strncpy()

2023-01-09T08:51:56+00:00

The implementation of strscpy() is more robust and safer.
That's now the recommended way to copy NUL-terminated strings.

Signed-off-by: Xu Panda 
Signed-off-by: Yang Yang 
Signed-off-by: Helge Deller

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

2022-12-17T22:19:38+00:00

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:

parisc: Export iosapic_serial_irq() symbol for serial port driver

2022-10-27T07:12:05+00:00

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:

parisc: Use signed char for hardware path in pdc.h

2022-10-21T07:15:20+00:00

Clean up the struct for hardware_path and drop the struct device_path
with a proper assignment of bc[] and mod members as signed chars.

This patch prepares for the kbuild change from Jason A. Donenfeld to
treat char as always unsigned.

Signed-off-by: Helge Deller 
Cc: Jason A. Donenfeld

Merge tag 'parisc-for-6.1-1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux

2022-10-14T19:10:01+00:00

Pull parisc updates from Helge Deller:
 "Fixes:

   - When we added basic vDSO support in kernel 5.18 we introduced a bug
     which prevented a mmap() of graphic card memory. This is because we
     used the DMB (data memory break trap bit) page flag as special-bit,
     but missed to clear that bit when loading the TLB.

   - Graphics card memory size was not correctly aligned

   - Spelling fixes (from Colin Ian King)

  Enhancements:

   - PDC console (which uses firmware calls) now rewritten as early
     console

   - Reduced size of alternative tables"

* tag 'parisc-for-6.1-1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
  parisc: Fix spelling mistake "mis-match" -> "mismatch" in eisa driver
  parisc: Fix userspace graphics card breakage due to pgtable special bit
  parisc: fbdev/stifb: Align graphics memory size to 4MB
  parisc: Convert PDC console to an early console
  parisc: Reduce kernel size by packing alternative tables

parisc: Fix spelling mistake "mis-match" -> "mismatch" in eisa driver

2022-10-14T18:06:30+00:00

There are several spelling mistakes in kernel error messages. Fix them.

Signed-off-by: Colin Ian King 
Signed-off-by: Helge Deller

Merge tag 'asm-generic-6.1' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic

2022-10-06T19:10:37+00:00

Pull asm-generic updates from Arnd Bergmann:
 "This contains a series from Linus Walleij to unify the linux/io.h
  interface by making the ia64, alpha, parisc and sparc include
  asm-generic/io.h.

  All functions provided by the generic header are now available to all
  drivers, but the architectures can still override this.

  For the moment, mips and sh still don't include asm-generic/io.h but
  provide a full set of functions themselves.

  There are also a few minor cleanups unrelated to this"

* tag 'asm-generic-6.1' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic:
  alpha: add full ioread64/iowrite64 implementation
  parisc: Drop homebrewn io[read|write]64_[lo_hi|hi_lo]
  parisc: hide ioread64 declaration on 32-bit
  ia64: export memory_add_physaddr_to_nid to fix cxl build error
  asm-generic: Remove empty #ifdef SA_RESTORER
  parisc: Use the generic IO helpers
  parisc: Remove 64bit access on 32bit machines
  sparc: Fix the generic IO helpers
  alpha: Use generic

parisc: remove obsolete manual allocation aligning in iosapic

2022-09-15T05:33:26+00:00

kmalloc() returns memory with __assume_kmalloc_alignment, which is
__alignof__(unsigned long long) for parisc.

Signed-off-by: Rolf Eike Beer 
Signed-off-by: Helge Deller

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

2022-09-13T06:50:31+00:00

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