05 Oct, 2010
20 commits
-
It is an early_initcall, so it should be in __init memory.
Signed-off-by: David Daney
To: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/1593/
Signed-off-by: Ralf Baechle -
The notifiers may be called at any time, so the notifier_block cannot
be in init memory.Signed-off-by: David Daney
To: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/1592/
Signed-off-by: Ralf Baechle -
Fix VMLINUZ_LOAD_ADDRESS calculation to be based on the length of
vmlinux.bin, the actual uncompressed kernel binary.Previously it was based on the length of KBUILD_IMAGE (the unstripped ELF
vmlinux), which is bigger than vmlinux.bin. As a result, vmlinuz was
loaded into a memory address higher then actually needed - a problem for
small memory platforms.Signed-off-by: Shmulik Ladkani
To: linux-mips@linux-mips.org
Cc: alex@digriz.org.uk
Cc: manuel.lauss@googlemail.com
Cc: sam@ravnborg.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/1564/
Acked-by: Wu Zhangjin
Signed-off-by: Ralf Baechle -
The function prom_init_cmdline() references the variable __initdata
arcs_cmdline.The function prom_get_ethernet_addr() references the variable __initdata
arcs_cmdline.Annotate prom_init_cmdline() as __init, unexport and annotate
prom_get_ethernet_addr() since it's no longer called from within
driver code.Signed-off-by: Manuel Lauss
To: Linux-MIPS
Patchwork: https://patchwork.linux-mips.org/patch/1547/
Signed-off-by: Ralf Baechle -
Noticed and original patch by Philby John .
Signed-off-by: Ralf Baechle
-
Signed-off-by: David Daney
To: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/1553/
Signed-off-by: Ralf Baechle -
Architectures need to set ARCH_DMA_MINALIGN to the minimum DMA
alignment (commit a6eb9fe105d5de0053b261148cee56c94b4720ca). Defining
ARCH_KMALLOC_MINALIGN doesn't work anymore.Signed-off-by: FUJITA Tomonori
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Cc: anemo@mba.ocn.ne.jp
Patchwork: https://patchwork.linux-mips.org/patch/1544/
Acked-by: Atsushi Nemoto
Signed-off-by: Ralf Baechle -
Commit 31c984a5acabea5d8c7224dc226453022be46f33 introduced a new syscall
getdents64. However, in the syscall table, the new syscall still refers to
the old getdents which doesn't work.The problem appeared with a system that uses the eglibc 2.12-r11187 (that
utilizes that new syscall) is very confused. The fix has been tested with
that eglibc version.Signed-off-by: Bernhard Walle
To: linux-mips@linux-mips.org
Cc: ddaney@caviumnetworks.com
Cc: akpm@linux-foundation.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/1567/
Signed-off-by: Ralf Baechle -
These would result in KERN_ actually getting printed.
Signed-off-by: Joe Perches
To: Jiri Kosina
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/1581/
Signed-off-by: Ralf Baechle -
No rubbish printks - those belong to userspace. The halt function now
actually halts the system and the poweroff function was deleted because
it didn't actually power down the system.Signed-off-by: Ralf Baechle
-
This prevents the GIC code from being reusable sanely.
Signed-off-by: Ralf Baechle
-
Only VSMP was known as SMVP and generally the help text was too short to
be helpful.Signed-off-by: Ralf Baechle
-
This only matters for ISA devices with a 24-bit DMA limit or for devices
with a 32-bit DMA limit on systems with ZONE_DMA32 enabled. The latter
currently only affects 32-bit PCI cards on Sibyte-based systems with more
than 1GB RAM installed.Signed-off-by: Ralf Baechle
-
_TIF_WORK_MASK false had _TIF_SYSCALL_AUDIT set. If a thread's
_TIF_SYSCALL_AUDIT is ever set this will lead to an endless loop on the
way out from a syscall.Currently this is only a theoretic bug as init/Kconfig doesn't allow
AUDIT_SYSCALL to be enabled for MIPS.Signed-off-by: Ralf Baechle
-
Signed-off-by: Ralf Baechle
-
This patch adds an config switch to determine if we need to build some
workaround helper files.The staging driver octeon-ethernet references some symbols which are only
built when PCI is enabled. The new config switch enables these symbols in
bothe cases.Signed-off-by: Andreas Bießmann
To: linux-kernel@vger.kernel.org
Cc: Andreas Bießmann
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/1543/
Acked-by: David Daney
Signed-off-by: Ralf Baechle -
The 64-bit kernel has already had its atomic64 functions. Except for that,
we use the generic spinlocked version. The atomic64 types and related
functions are needed for the Linux performance counter subsystem.Signed-off-by: Deng-Cheng Zhu
To: linux-mips@linux-mips.org
Cc: a.p.zijlstra@chello.nl
Cc: paulus@samba.org
Cc: mingo@elte.hu
Cc: acme@redhat.com
Cc: jamie.iles@picochip.com
Patchwork: https://patchwork.linux-mips.org/patch/1361/
Acked-by: David Daney
Signed-off-by: Ralf Baechle -
Signed-off-by: Ricardo Mendoza
To: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/1540/
Signed-off-by: Ralf Baechle -
Indent the branch of an if.
The semantic match that finds this problem is as follows:
(http://coccinelle.lip6.fr/)//
@r disable braces4@
position p1,p2;
statement S1,S2;
@@(
if (...) { ... }
|
if (...) S1@p1 S2@p2
)@script:python@
p1 << r.p1;
p2 << r.p2;
@@if (p1[0].column == p2[0].column):
cocci.print_main("branch",p1)
cocci.print_secs("after",p2)
//Signed-off-by: Julia Lawall
To: linux-mips@linux-mips.org
To: linux-kernel@vger.kernel.org
To: kernel-janitors@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/1539/
Signed-off-by: Ralf Baechle -
"Userpace" -> "Userspace"
Signed-off-by: Andrea Gelmini
Cc: Andrea Gelmini
Cc: Jason Wessel
Cc: Martin Hicks
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/1536/
Signed-off-by: Ralf Baechle
02 Oct, 2010
20 commits
-
* git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6:
cifs: prevent infinite recursion in cifs_reconnect_tcon
cifs: set backing_dev_info on new S_ISREG inodes -
…git/tip/linux-2.6-tip
* 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
x86, hpet: Fix bogus error check in hpet_assign_irq()
x86, irq: Plug memory leak in sparse irq
x86, cpu: After uncapping CPUID, re-run CPU feature detection -
flush_icache_range() is given virtual addresses to describe the region. It
deals with these by attempting to translate them through the current set of
page tables.This is fine for userspace memory and vmalloc()'d areas as they are governed by
page tables. However, since the regions above 0x80000000 aren't translated
through the page tables by the MMU, the kernel doesn't bother to set up page
tables for them (see paging_init()).This means flush_icache_range() as it stands cannot be used to flush regions of
the VM area between 0x80000000 and 0x9fffffff where the kernel resides if the
data cache is operating in WriteBack mode.To fix this, make flush_icache_range() first check for addresses in the upper
half of VM space and deal with them appropriately, before dealing with any
range in the page table mapped area.Ordinarily, this is not a problem, but it has the capacity to make kprobes and
kgdb malfunction. It should not affect gdbstub, signal frame setup or module
loading as gdb has its own flush functions, and the others take place in the
page table mapped area only.Signed-off-by: David Howells
Acked-by: Akira Takeuchi
Signed-off-by: Linus Torvalds -
* 'drm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6:
vmwgfx: Fix fb VRAM pinning failure due to fragmentation
vmwgfx: Remove initialisation of dev::devname
vmwgfx: Enable use of the vblank system
vmwgfx: vt-switch (master drop) fixes
drm/vmwgfx: Fix breakage introduced by commit "drm: block userspace under allocating buffer and having drivers overwrite it (v2)"
drm: Hold the mutex when dropping the last GEM reference (v2)
drm/gem: handlecount isn't really a kref so don't make it one.
drm: i810/i830: fix locked ioctl variant
drm/radeon/kms: add quirk for MSI K9A2GM motherboard
drm/radeon/kms: fix potential segfault in r600_ioctl_wait_idle
drm: Prune GEM vma entries
drm/radeon/kms: fix up encoder info messages for DFP6
drm/radeon: fix PCI ID 5657 to be an RV410 -
* 'for-linus/i2c/2636-rc5' of git://git.fluff.org/bjdooks/linux:
i2c-s3c2410: fix calculation of SDA line delay
i2c-davinci: Fix race when setting up for TX
i2c-octeon: Return -ETIMEDOUT in octeon_i2c_wait() on timeout -
* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6:
ACPI: invoke DSDT corruption workaround on all Toshiba Satellite
ACPI, APEI, Fix ERST MOVE_DATA instruction implementation
ACPI: fan: Fix more unbalanced code block
ACPI: acpi_pad: simplify code to avoid false gcc build warning
ACPI, APEI, Fix error path for memory allocation
ACPI, APEI, HEST Fix the unsuitable usage of platform_data
ACPI, APEI, Fix acpi_pre_map() return value
ACPI, APEI, Fix APEI related table size checking
ACPI: Disable Windows Vista compatibility for Toshiba P305D
ACPI: Kconfig: fix typo.
ACPI: add missing __percpu markup in arch/x86/kernel/acpi/cstate.c
ACPI: Fix typos
ACPI video: fix a poor warning message
ACPI: fix build warnings resulting from merge window conflict
ACPI: EC: add Vista incompatibility DMI entry for Toshiba Satellite L355
ACPI: expand Vista blacklist to include SP1 and SP2
ACPI: delete ZEPTO idle=nomwait DMI quirk
ACPI: enable repeated PCIEXP wakeup by clearing PCIEXP_WAKE_STS on resume
PM / ACPI: Blacklist systems known to require acpi_sleep=nonvs
ACPI: Don't report current_now if battery reports in mWh -
* 'idle-release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-idle-2.6:
intel_idle: Voluntary leave_mm before entering deeper
acpi_idle: add missing \n to printk
intel_idle: add missing __percpu markup
intel_idle: Change mode 755 => 644
cpuidle: Fix typos
intel_idle: PCI quirk to prevent Lenovo Ideapad s10-3 boot hang -
…/git/tmlind/linux-omap-2.6
* 'omap-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap-2.6:
omap: McBSP: tx_irq_completion used in rx_irq_handler
omap: Fix compile dependency to LEDS_CLASS -
Prevent from recursively locking the reiserfs lock in reiserfs_unpack()
because we may call journal_begin() that requires the lock to be taken
only once, otherwise it won't be able to release the lock while taking
other mutexes, ending up in inverted dependencies between the journal
mutex and the reiserfs lock for example.This fixes:
=======================================================
[ INFO: possible circular locking dependency detected ]
2.6.35.4.4a #3
-------------------------------------------------------
lilo/1620 is trying to acquire lock:
(&journal->j_mutex){+.+...}, at: [] do_journal_begin_r+0x7f/0x340 [reiserfs]but task is already holding lock:
(&REISERFS_SB(s)->lock){+.+.+.}, at: [] reiserfs_write_lock+0x28/0x40 [reiserfs]which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #1 (&REISERFS_SB(s)->lock){+.+.+.}:
[] lock_acquire+0x67/0x80
[] __mutex_lock_common+0x4d/0x410
[] mutex_lock_nested+0x18/0x20
[] reiserfs_write_lock+0x28/0x40 [reiserfs]
[] do_journal_begin_r+0x86/0x340 [reiserfs]
[] journal_begin+0x77/0x140 [reiserfs]
[] reiserfs_remount+0x224/0x530 [reiserfs]
[] do_remount_sb+0x60/0x110
[] do_mount+0x625/0x790
[] sys_mount+0x84/0xb0
[] syscall_call+0x7/0xb-> #0 (&journal->j_mutex){+.+...}:
[] __lock_acquire+0x1026/0x1180
[] lock_acquire+0x67/0x80
[] __mutex_lock_common+0x4d/0x410
[] mutex_lock_nested+0x18/0x20
[] do_journal_begin_r+0x7f/0x340 [reiserfs]
[] journal_begin+0x77/0x140 [reiserfs]
[] reiserfs_persistent_transaction+0x41/0x90 [reiserfs]
[] reiserfs_get_block+0x22c/0x1530 [reiserfs]
[] __block_prepare_write+0x1bb/0x3a0
[] block_prepare_write+0x26/0x40
[] reiserfs_prepare_write+0x88/0x170 [reiserfs]
[] reiserfs_unpack+0xe6/0x120 [reiserfs]
[] reiserfs_ioctl+0x272/0x320 [reiserfs]
[] vfs_ioctl+0x28/0xa0
[] do_vfs_ioctl+0x32d/0x5c0
[] sys_ioctl+0x63/0x70
[] syscall_call+0x7/0xbother info that might help us debug this:
2 locks held by lilo/1620:
#0: (&sb->s_type->i_mutex_key#8){+.+.+.}, at: [] reiserfs_unpack+0x6a/0x120 [reiserfs]
#1: (&REISERFS_SB(s)->lock){+.+.+.}, at: [] reiserfs_write_lock+0x28/0x40 [reiserfs]stack backtrace:
Pid: 1620, comm: lilo Not tainted 2.6.35.4.4a #3
Call Trace:
[] __lock_acquire+0x1026/0x1180
[] lock_acquire+0x67/0x80
[] __mutex_lock_common+0x4d/0x410
[] mutex_lock_nested+0x18/0x20
[] do_journal_begin_r+0x7f/0x340 [reiserfs]
[] journal_begin+0x77/0x140 [reiserfs]
[] reiserfs_persistent_transaction+0x41/0x90 [reiserfs]
[] reiserfs_get_block+0x22c/0x1530 [reiserfs]
[] __block_prepare_write+0x1bb/0x3a0
[] block_prepare_write+0x26/0x40
[] reiserfs_prepare_write+0x88/0x170 [reiserfs]
[] reiserfs_unpack+0xe6/0x120 [reiserfs]
[] reiserfs_ioctl+0x272/0x320 [reiserfs]
[] vfs_ioctl+0x28/0xa0
[] do_vfs_ioctl+0x32d/0x5c0
[] sys_ioctl+0x63/0x70
[] syscall_call+0x7/0xbReported-by: Jarek Poplawski
Tested-by: Jarek Poplawski
Signed-off-by: Frederic Weisbecker
Cc: Jeff Mahoney
Cc: All since 2.6.32
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
The reiserfs mutex already depends on the inode mutex, so we can't lock
the inode mutex in reiserfs_unpack() without using the safe locking API,
because reiserfs_unpack() is always called with the reiserfs mutex locked.This fixes:
=======================================================
[ INFO: possible circular locking dependency detected ]
2.6.35c #13
-------------------------------------------------------
lilo/1606 is trying to acquire lock:
(&sb->s_type->i_mutex_key#8){+.+.+.}, at: [] reiserfs_unpack+0x60/0x110 [reiserfs]but task is already holding lock:
(&REISERFS_SB(s)->lock){+.+.+.}, at: [] reiserfs_write_lock+0x28/0x40 [reiserfs]which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #1 (&REISERFS_SB(s)->lock){+.+.+.}:
[] lock_acquire+0x67/0x80
[] __mutex_lock_common+0x4d/0x410
[] mutex_lock_nested+0x18/0x20
[] reiserfs_write_lock+0x28/0x40 [reiserfs]
[] reiserfs_lookup_privroot+0x2a/0x90 [reiserfs]
[] reiserfs_fill_super+0x941/0xe60 [reiserfs]
[] get_sb_bdev+0x117/0x170
[] get_super_block+0x21/0x30 [reiserfs]
[] vfs_kern_mount+0x6a/0x1b0
[] do_kern_mount+0x39/0xe0
[] do_mount+0x340/0x790
[] sys_mount+0x84/0xb0
[] syscall_call+0x7/0xb-> #0 (&sb->s_type->i_mutex_key#8){+.+.+.}:
[] __lock_acquire+0x1026/0x1180
[] lock_acquire+0x67/0x80
[] __mutex_lock_common+0x4d/0x410
[] mutex_lock_nested+0x18/0x20
[] reiserfs_unpack+0x60/0x110 [reiserfs]
[] reiserfs_ioctl+0x272/0x320 [reiserfs]
[] vfs_ioctl+0x28/0xa0
[] do_vfs_ioctl+0x32d/0x5c0
[] sys_ioctl+0x63/0x70
[] syscall_call+0x7/0xbother info that might help us debug this:
1 lock held by lilo/1606:
#0: (&REISERFS_SB(s)->lock){+.+.+.}, at: [] reiserfs_write_lock+0x28/0x40 [reiserfs]stack backtrace:
Pid: 1606, comm: lilo Not tainted 2.6.35c #13
Call Trace:
[] __lock_acquire+0x1026/0x1180
[] lock_acquire+0x67/0x80
[] __mutex_lock_common+0x4d/0x410
[] mutex_lock_nested+0x18/0x20
[] reiserfs_unpack+0x60/0x110 [reiserfs]
[] reiserfs_ioctl+0x272/0x320 [reiserfs]
[] vfs_ioctl+0x28/0xa0
[] do_vfs_ioctl+0x32d/0x5c0
[] sys_ioctl+0x63/0x70
[] syscall_call+0x7/0xbReported-by: Jarek Poplawski
Tested-by: Jarek Poplawski
Signed-off-by: Frederic Weisbecker
Cc: Jeff Mahoney
Cc: [2.6.32 and later]
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Signed-off-by: Kukjin Kim
Acked-by: Ben Dooks
Acked-by: Russell King
Cc: Kyungmin Park
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
I moved couple years ago, so let's update my email and snail mail.
And I do not have any access to Matrox hardware anymore, and I'm quite
unresponsive to matroxfb bug reports (sorry Alan), so saying that I'm
maintainer is a bit far fetched.For ncpfs I do not use ncpfs in my daily life either, but at least I can
test that one, so I can stay listed here for odd fixes.Signed-off-by: Petr Vandrovec
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Having the limits file world readable will ease the task of system
management on systems where root privileges might be restricted.Having admin restricted with root priviledges, he/she could not check
other users process' limits.Also it'd align with most of the /proc stat files.
Signed-off-by: Jiri Olsa
Acked-by: Neil Horman
Cc: Eugene Teo
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
If the original list is a POT in length, the first callback from line 73
will pass a==b both pointing to the original list_head. This is dangerous
because the 'list_sort()' user can use 'container_of()' and accesses the
"containing" object, which does not necessary exist for the list head. So
the user can access RAM which does not belong to him. If this is a write
access, we can end up with memory corruption.Signed-off-by: Don Mullis
Tested-by: Artem Bityutskiy
Signed-off-by: Artem Bityutskiy
Cc:
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
The semctl syscall has several code paths that lead to the leakage of
uninitialized kernel stack memory (namely the IPC_INFO, SEM_INFO,
IPC_STAT, and SEM_STAT commands) during the use of the older, obsolete
version of the semid_ds struct.The copy_semid_to_user() function declares a semid_ds struct on the stack
and copies it back to the user without initializing or zeroing the
"sem_base", "sem_pending", "sem_pending_last", and "undo" pointers,
allowing the leakage of 16 bytes of kernel stack memory.The code is still reachable on 32-bit systems - when calling semctl()
newer glibc's automatically OR the IPC command with the IPC_64 flag, but
invoking the syscall directly allows users to use the older versions of
the struct.Signed-off-by: Dan Rosenberg
Cc: Manfred Spraul
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Array of udimm sysfs attributes was not ended with NULL marker, leading to
dereference of random memory.EDAC DEBUG: edac_create_mci_instance_attributes: edac_create_mci_instance_attributes() file udimm0
EDAC DEBUG: edac_create_mci_instance_attributes: edac_create_mci_instance_attributes() file udimm1
EDAC DEBUG: edac_create_mci_instance_attributes: edac_create_mci_instance_attributes() file udimm2
BUG: unable to handle kernel NULL pointer dereference at 00000000000001a4
IP: [] edac_create_mci_instance_attributes+0x148/0x1f1
Pid: 1, comm: swapper Not tainted 2.6.36-rc3-nv+ #483 P6T SE/System Product Name
RIP: 0010:[] [] edac_create_mci_instance_attributes+0x148/0x1f1
(...)
Call Trace:
[] edac_create_mci_instance_attributes+0x198/0x1f1
[] edac_create_sysfs_mci_device+0xbb/0x2b2
[] edac_mc_add_mc+0x46b/0x557
[] i7core_probe+0xccf/0xec0
RIP [] edac_create_mci_instance_attributes+0x148/0x1f1
---[ end trace 20de320855b81d78 ]---
Kernel panic - not syncing: Attempted to kill init!Signed-off-by: Marcin Slusarz
Cc: Mauro Carvalho Chehab
Acked-by: Doug Thompson
Cc:
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
sparc64 allmodconfig:
drivers/serial/mrst_max3110.c: In function `serial_m3110_startup':
drivers/serial/mrst_max3110.c:470: error: `IRQ_TYPE_EDGE_FALLING' undeclared (first use in this function)Cc: Greg KH
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Fix the warnings
arch/m68k/mac/macboing.c: In function 'mac_mksound':
arch/m68k/mac/macboing.c:189: warning: comparison of distinct pointer types lacks a cast
arch/m68k/mac/macboing.c:211: warning: comparison of distinct pointer types lacks a cast
arch/m68k/mac/macboing.c: In function 'mac_quadra_start_bell':
arch/m68k/mac/macboing.c:241: warning: comparison of distinct pointer types lacks a cast
arch/m68k/mac/macboing.c:263: warning: comparison of distinct pointer types lacks a cast
arch/m68k/mac/macboing.c: In function 'mac_quadra_ring_bell':
arch/m68k/mac/macboing.c:283: warning: comparison of distinct pointer types lacks a castCc: Geert Uytterhoeven
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
alpha allmodconfig:
drivers/serial/mfd.c:144: error: implicit declaration of function 'kzalloc'
drivers/serial/mfd.c:144: warning: assignment makes pointer from integer without a castCc: Greg Kroah-Hartman
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
The kfifo_dma family of functions use sg_mark_end() on the last element in
their scatterlist. This forces use of a fresh scatterlist for each DMA
operation, which makes recycling a single scatterlist impossible.Change the behavior of the kfifo_dma functions to match the usage of the
dma_map_sg function. This means that users must respect the returned
nents value. The sample code is updated to reflect the change.This bug is trivial to cause: call kfifo_dma_in_prepare() such that it
prepares a scatterlist with a single entry comprising the whole fifo.
This is the case when you map the entirety of a newly created empty fifo.
This causes the setup_sgl() function to mark the first scatterlist entry
as the end of the chain, no matter what comes after it.Afterwards, add and remove some data from the fifo such that another call
to kfifo_dma_in_prepare() will create two scatterlist entries. It returns
nents=2. However, due to the previous sg_mark_end() call, sg_is_last()
will now return true for the first scatterlist element. This causes the
sample code to print a single scatterlist element when it should print
two.By removing the call to sg_mark_end(), we make the API as similar as
possible to the DMA mapping API. All users are required to respect the
returned nents.Signed-off-by: Ira W. Snyder
Cc: Stefani Seibold
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
