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2015-04-24x86: fix special __probe_kernel_write() tail zeroing caseLinus Torvalds1-1/+1
Commit cae2a173fe94 ("x86: clean up/fix 'copy_in_user()' tail zeroing") fixed the failure case tail zeroing of one special case of the x86-64 generic user-copy routine, namely when used for the user-to-user case ("copy_in_user()"). But in the process it broke an even more unusual case: using the user copy routine for kernel-to-kernel copying. Now, normally kernel-kernel copies are obviously done using memcpy(), but we have a couple of special cases when we use the user-copy functions. One is when we pass a kernel buffer to a regular user-buffer routine, using set_fs(KERNEL_DS). That's a "normal" case, and continued to work fine, because it never takes any faults (with the possible exception of a silent and successful vmalloc fault). But Jan Beulich pointed out another, very unusual, special case: when we use the user-copy routines not because it's a path that expects a user pointer, but for a couple of ftrace/kgdb cases that want to do a kernel copy, but do so using "unsafe" buffers, and use the user-copy routine to gracefully handle faults. IOW, for probe_kernel_write(). And that broke for the case of a faulting kernel destination, because we saw the kernel destination and wanted to try to clear the tail of the buffer. Which doesn't work, since that's what faults. This only triggers for things like kgdb and ftrace users (eg trying setting a breakpoint on read-only memory), but it's definitely a bug. The fix is to not compare against the kernel address start (TASK_SIZE), but instead use the same limits "access_ok()" uses. Reported-and-tested-by: Jan Beulich <jbeulich@suse.com> Cc: stable@vger.kernel.org # 4.0 Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-04-24nios2: rework cacheLey Foon Tan3-17/+57
- flush dcache before flush instruction cache - remork update_mmu_cache and flush_dcache_page - add shmparam.h Signed-off-by: Ley Foon Tan <lftan@altera.com>
2015-04-24nios2: Add types.h header required for __u32 typeEzequiel Garcia1-0/+2
Reported by the header checker (CONFIG_HEADERS_CHECK=y): CHECK usr/include/asm/ (31 files) ./usr/include/asm/ptrace.h:77: found __[us]{8,16,32,64} type without #include <linux/types.h> Signed-off-by: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar> Acked-by: Ley Foon Tan <lftan@altera.com>
2015-04-24ALSA: hda - fix headset mic detection problem for one more machineHui Wang1-9/+15
We have two machines with alc256 codec in the pin quirk table, so moving the common pins to ALC256_STANDARD_PINS. Cc: stable@vger.kernel.org BugLink: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1447909 Signed-off-by: Hui Wang <hui.wang@canonical.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2015-04-24eth: bf609 eth clock: add pclk clock for stmmac driver probeSteven Miao1-0/+7
Signed-off-by: Steven Miao <realmz6@gmail.com>
2015-04-24blackfin: Wire up missing syscallsChen Gang2-1/+21
The related syscalls are below which may cause samples/kdbus building break in next-20150401 tree, the related information and error: CALL scripts/checksyscalls.sh <stdin>:1223:2: warning: #warning syscall kcmp not implemented [-Wcpp] <stdin>:1226:2: warning: #warning syscall finit_module not implemented [-Wcpp] <stdin>:1229:2: warning: #warning syscall sched_setattr not implemented [-Wcpp] <stdin>:1232:2: warning: #warning syscall sched_getattr not implemented [-Wcpp] <stdin>:1235:2: warning: #warning syscall renameat2 not implemented [-Wcpp] <stdin>:1238:2: warning: #warning syscall seccomp not implemented [-Wcpp] <stdin>:1241:2: warning: #warning syscall getrandom not implemented [-Wcpp] <stdin>:1244:2: warning: #warning syscall memfd_create not implemented [-Wcpp] <stdin>:1247:2: warning: #warning syscall bpf not implemented [-Wcpp] <stdin>:1250:2: warning: #warning syscall execveat not implemented [-Wcpp] [...] HOSTCC samples/kdbus/kdbus-workers samples/kdbus/kdbus-workers.c: In function ‘prime_new’: samples/kdbus/kdbus-workers.c:930:18: error: ‘__NR_memfd_create’ undeclared (first use in this function) p->fd = syscall(__NR_memfd_create, "prime-area", MFD_CLOEXEC); ^ samples/kdbus/kdbus-workers.c:930:18: note: each undeclared identifier is reported only once for each function it appears in Signed-off-by: Chen Gang <gang.chen.5i5j@gmail.com>
2015-04-23arch: blackfin: kernel: kgdb: Remove unused functionRickard Strandqvist1-13/+0
Remove the function kgdb_post_primary_code() that is not used anywhere. This was partially found by using a static code analysis program called cppcheck. Signed-off-by: Rickard Strandqvist <rickard_strandqvist@spectrumdigital.se> Acked-by: Sonic Zhang <sonic.zhang@analog.com>
2015-04-23dma: fix build error after update to v3.19Steven Miao1-8/+0
Signed-off-by: Steven Miao <realmz6@gmail.com>
2015-04-23blackfin: io: define __raw_readx/writex with bfin_readx/writexSteven Miao1-21/+6
Signed-off-by: Steven Miao <realmz6@gmail.com>
2015-04-23bf609: add resources for lcd nl8048Scott Jiang1-1/+30
Signed-off-by: Scott Jiang <scott.jiang.linux@gmail.com> Signed-off-by: Steven Miao <realmz6@gmail.com>
2015-04-23pm: sometimes wake up from suspend to RAM would failAaron Wu1-0/+2
Sometimes it fails to wake up from suspend to RAM, this is because we would flush the data cache by assemble command FLUSHINV before suspend to RAM, and there is a delay between this command execution and cache flush completion. Add a 1uS delay to works around this. Signed-off-by: Aaron Wu <Aaron.wu@analog.com>
2015-04-23debug-mmrs: Eliminate all traces of the USB_PHY_TEST MMRAndre Wolokita7-24/+0
Interacting with the USB_PHY_TEST MMR through debugfs was causing wide-spread chaos in the realm (kernel panic). Expunge all references to this demonic register. Signed-off-by: Andre Wolokita <Andre.Wolokita@analog.com>
2015-04-23bf609: remove softswitch i2c configuration from adv7842 and adv7511 platform dataSonic Zhang1-2/+0
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
2015-04-23bf609: add platform data for soft switch devices on the video extendersSonic Zhang1-0/+22
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
2015-04-23bf609: enable soft switch gpio driver by defaultSonic Zhang1-0/+1
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
2015-04-23bf609: add gpio soft switch platform data for mcp23017 i2c devicesSonic Zhang1-0/+27
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
2015-04-23bf609: use new SND_BF6XX_PCM to choose audio pcm driverScott Jiang1-4/+4
There is a new bf6xx audio dma driver, so we don't reuse bf5xx i2s pcm driver again. Signed-off-by: Scott Jiang <scott.jiang.linux@gmail.com>
2015-04-23bug[220] kgdb: change the smp cross core function entrySonic Zhang1-8/+4
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
2015-04-23arch: blackfin: kernel: setup.c: Cleaning up missing null-terminate in conjunction with strncpyRickard Strandqvist1-1/+1
Replacing strncpy with strlcpy to avoid strings that lacks null terminate. Signed-off-by: Rickard Strandqvist <rickard_strandqvist@spectrumdigital.se> Signed-off-by: Steven Miao <realmz6@gmail.com>
2015-04-23blackfin: defconfigs: cleanup unused CONFIG_MTD_CHAR, add MTD_SPI_NOR for BF537-STAMPSteven Miao21-21/+2
Signed-off-by: Steven Miao <realmz6@gmail.com>
2015-04-23pwm: Remove __init initializer for pwm_add_table()Shobhit Kumar1-1/+1
For platforms that don't support DT, some early MFD modules can register lookup tables. Remove the __init annotation so that this works. This is similar to gpio_add_lookup_table() which allows late additions. CC: Samuel Ortiz <sameo@linux.intel.com> Cc: Linus Walleij <linus.walleij@linaro.org> Cc: Alexandre Courbot <gnurou@gmail.com> Cc: Thierry Reding <thierry.reding@gmail.com> Signed-off-by: Shobhit Kumar <shobhit.kumar@intel.com> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2015-04-23ALSA: hda/realtek - Fix Headphone Mic doesn't recording for ALC256Kailang Yang1-0/+1
Switch default pcbeep path to Line in path. Signed-off-by: Kailang Yang <kailang@realtek.com> Tested-by: Hui Wang <hui.wang@canonical.com> Cc: <stable@vger.kernel.org> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2015-04-23powerpc/mm: Fix build error with CONFIG_PPC_TRANSACTIONAL_MEM disabledAneesh Kumar K.V1-0/+1
This fix the below build error arch/powerpc/mm/hash_utils_64.c: In function ‘flush_hash_hugepage’: arch/powerpc/mm/hash_utils_64.c:1381:1: error: label at end of compound statement tm_abort: ^ make[1]: *** [arch/powerpc/mm/hash_utils_64.o] Error 1 Reported-by: Anshuman Khandual <khandual@linux.vnet.ibm.com> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2015-04-22frv: add io{read,write}{16,32}be functionsGuenter Roeck1-0/+5
These functions are used in various drivers, including the latest version of the 8250 driver. The latter causes the following build failure. drivers/tty/serial/8250/8250_core.c: In function 'mem32be_serial_out': drivers/tty/serial/8250/8250_core.c:456:2: error: implicit declaration of function 'iowrite32be' drivers/tty/serial/8250/8250_core.c: In function 'mem32be_serial_in': drivers/tty/serial/8250/8250_core.c:462:2: error: implicit declaration of function 'ioread32be' Cc: Kevin Cernekee <cernekee@gmail.com> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Fixes: c627f2ceb692 ("serial: 8250: Add support for big-endian MMIO accesses") Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Rob Herring <robh@kernel.org>
2015-04-22mn10300: add io{read,write}{16,32}be functionsGuenter Roeck1-0/+5
These functions are used in various drivers, including the latest version of the 8250 driver. The latter causes the following build failure. drivers/tty/serial/8250/8250_core.c: In function 'mem32be_serial_out': drivers/tty/serial/8250/8250_core.c:456:2: error: implicit declaration of function 'iowrite32be' drivers/tty/serial/8250/8250_core.c: In function 'mem32be_serial_in': drivers/tty/serial/8250/8250_core.c:462:2: error: implicit declaration of function 'ioread32be' Cc: Kevin Cernekee <cernekee@gmail.com> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Fixes: c627f2ceb692 ("serial: 8250: Add support for big-endian MMIO accesses") Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Rob Herring <robh@kernel.org>