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2016-11-14spi: fsl-espi: remove usage of mpc8xxx_spi->flagsHeiner Kallweit1-6/+5
Change the check to access property "mode" directly. This allows us to get rid of mpc8xxx_spi->flags in a subsequent patch in this patch series as it's used nowhere else. Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2016-11-14spi: fsl-espi: remove remaining usage of struct fsl_spi_platform_dataHeiner Kallweit1-15/+11
Use master->num_chipselect directly instead of pdata->max_chipselect. In this context let of_fsl_espi_get_chipselects return max_chipselect. This change allows us to get rid of struct fsl_spi_platform_data completely in the fsl-espi driver. Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2016-11-14spi: fsl-espi: don't set pdata->cs_controlHeiner Kallweit1-1/+0
Don't set pdata->cs_control as it's nowhere used in fsl-espi and fsl-lib. Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2016-11-14spi: fsl-espi: remove usage of pdata->initial_spmodeHeiner Kallweit1-2/+2
Remove pdata->initial_spmode as it is nowhere set. Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2016-11-11spi: fsl-espi: add support for dual output read modeHeiner Kallweit1-1/+12
This patch adds support for dual output read mode. It was successfully tested on a P1014-based device with S25FL128S SPINOR flash. With 50MHz SPI clock the read rate is 11MByte/s. Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2016-11-11spi: fsl-espi: add support for ESPI RXSKIP modeHeiner Kallweit2-4/+48
This patch adds support for ESPI RXSKIP mode. This mode is optimized for flash reads: - sends a number of bytes and then reads a number of bytes - shifts out zeros automatically when reading Supporting RXSKIP mode is a prerequisite for supporting dual output read mode. Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2016-11-04spi: fsl-espi: don't write ESPI_SPMODE register if the mode doesn't changeHeiner Kallweit1-2/+5
There's no need to bother the chip if the mode doesn't change. Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2016-11-04spi: fsl-espi: remove unneeded call to fsl_espi_setup_transferHeiner Kallweit1-2/+0
Resetting the chip to a default transfer mode after each transfer doesn't provide any benefit. Therefore remove this call. Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2016-10-29spi: fsl-espi: fix support for all available clock ratesPaulo Zaneti1-16/+12
According to NXP ESPI datasheet, the SPI clock rate is: spi_clk = System_Clock / ( 2 * DIV16 * ( 1 + PM ) ) Where System_Clock is the platform clock divided by 2, DIV16 may be 1 or 16, and PM is a 4 bits integer (0 to 15). Isolating PM on the expression, we get: PM = (System_Clock / ( 2 * DIV16 * spi_clk ) ) - 1 Where System_Clock = mpc8xxx_spi->spibrg / 2, spi_clk = hz, and DIV16 = 1 or DIV16 = 16. So, PM = (mpc8xxx_spi->spibrg / ( 4 * hz) ) - 1 or PM = (mpc8xxx_spi->spibrg / ( 16 * 4 * hz) ) - 1 Current spi-fsl-espi driver can't configure the HW for all supported clock rates. It filters out clock rates for PM = 0 and PM = 1. This patch allows all range of supported clock rates to be configured on the ESPI controller. Signed-off-by: Paulo Zaneti <paulo.zaneti@datacom.ind.br> Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2016-10-29spi: fsl-espi: small fix to error path in fsl_espi_irqHeiner Kallweit1-1/+1
spin_lock is used to obtain the spinlock, so spin_unlock has to be used here. Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2016-10-28spi: fsl-espi: fix and improve reading from RX FIFOHeiner Kallweit1-47/+20
Currently the driver polls in the ISR for enough bytes in the RX FIFO. An ISR should never do this. Change it to read as much as possible whenever the ISR is called. This also allows to significantly simplify the code. Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2016-10-28spi: fsl-espi: make better use of the RX FIFOHeiner Kallweit1-3/+8
So far an interrupt is triggered whenever there's at least one byte in the RX FIFO. This results in a unnecessarily high number of interrupts. Change this to generate an interrupt if - RX FIFO is half full (except if all bytes to read fit into the RX FIFO anyway) - end of transfer has been reached This way the number of interrupts can be significantly reduced. Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2016-10-28spi: fsl-espi: extend and improve transfer error handlingHeiner Kallweit1-5/+17
Extend and improve transfer error handling - in case of timeout report also number of remaining rx bytes - in case of timeout return ETIMEDOUT instead of EMSGSIZE - add sanity checks after all bytes have been sent / read: - check that HW has flag SPIE_DON set - check that RX / TX FIFO are empty Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2016-10-28spi: fsl-espi: simplify and inline function fsl_espi_change_modeHeiner Kallweit1-21/+2
The ESPI spec mentions no requirement to turn off the ESPI unit prior to changing the mode. Most likely the ESPI unit is only turned off to clear the FIFO's as before this patch series single bytes could remain in the TX FIFO after transfer end. Therefore remove disabling / re-enabling the ESPI unit. Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2016-10-28spi: fsl-espi: Rename len in struct mpc8xxx_spi to rx_len and make it unsignedHeiner Kallweit2-12/+12
Now that we introduced element tx_len in struct mpc8xxx_spi let's rename element len to rx_len as it actually is the number of bytes to receive. In addition make it unsigned. Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2016-10-28spi: fsl-espi: fix and improve writing to TX FIFOHeiner Kallweit2-26/+44
This change addresses two issues: - If the TX FIFO is full the ISR polls until there's free space again. An ISR should never wait for something. - Currently the number of bytes to transfer is rounded up to the next multiple of 4. For most transfers therefore few bytes remain in the TX FIFO after end of transfer. This would cause the next transfer to fail and as a workaround the ESPI block is disabled / re-enabled in fsl_espi_change_mode. This seems to clear the FIFO's (although it's not mentioned in the spec). With this change the TX FIFO is filled as much as possible initially and whenever the ISR is called. Also the exact number of bytes is transferred. The spinlock protects against a potential race if the first interrupt occurs whilst the TX FIFO is still being initially filled. Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2016-10-28spi: fsl-espi: improve check for SPI_QE_CPU_MODEHeiner Kallweit1-2/+3
SPI_QE_CPU_MODE doesn't exist for ESPI and is set by of_mpc8xxx_spi_probe based on DT property "mode". This property is not defined for ESPI, see Documentation/devicetree/bindings/spi/fsl-spi.txt. So print an error message and bail out if SPI_QE_CPU_MODE is set. Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2016-10-28spi: fsl-espi: fix merge conflict for commit "avoid processing uninitalized data on error"Heiner Kallweit1-1/+1
Commit 5c0ba57744b1 ("spi: fsl-espi: avoid processing uninitalized data on error") applied fine to stable but caused a merge conflict on next. This patch fixes that. Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2016-10-26spi: fsl-espi: avoid processing uninitalized data on errorArnd Bergmann1-1/+1
When we get a spurious interrupt in fsl_espi_irq, we end up processing four uninitalized bytes of data, as shown in this warning message: drivers/spi/spi-fsl-espi.c: In function 'fsl_espi_irq': drivers/spi/spi-fsl-espi.c:462:4: warning: 'rx_data' may be used uninitialized in this function [-Wmaybe-uninitialized] This adds another check so we skip the data in this case. Fixes: 6319a68011b8 ("spi/fsl-espi: avoid infinite loops on fsl_espi_cpu_irq()") Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Mark Brown <broonie@kernel.org> Cc: stable@vger.kernel.org
2016-10-21spi: fsl-espi: fix handling of word sizes other than 8 bitHeiner Kallweit1-48/+36
The code in fsl_espi_tx_buf_lsb and parts of fsl_espi_setup_transfer look very weird and don't reflect the ESPI spec. ESPI stores values with <= 8 bit word size right justified as 8 bit value and values with > 8 bit word size right justified as 16 bit value. Therefore no such shifting is needed. Only case MSB-first with 8 bit word size is correctly handled, and most likely nobody ever used this driver with a different config. On ESPI only the case LSB-first with word size > 8 bit needs a special handling. In this case a little endian 16 bit value has to be written to the TX FIFO what requires a byte swap as the host system is big endian. The same applies to reading from the RX FIFO. Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2016-10-21spi: fsl-espi: reject MSB-first transfers with word sizes other than 8 or 16Heiner Kallweit1-0/+10
According to the ESPI spec MSB-first transfers are supported for word size 8 and 16 only. Check for this and reject MSB-first transfers with other word sizes. Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2016-10-21spi: fsl-espi: replace of_get_property with of_property_read_u32Heiner Kallweit1-21/+20
of_property_read_u32 is better here than generic of_get_property: - implicit endianness conversion if needed - implicit checking of size of property Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2016-10-15Linux 4.9-rc1Linus Torvalds1-2/+2
2016-10-14score: traps: Add missing include file to fix build errorGuenter Roeck1-0/+1
score images fail to build as follows. arch/score/kernel/traps.c: In function 'show_stack': arch/score/kernel/traps.c:55:3: error: implicit declaration of function '__get_user' __get_user() is declared in asm/uaccess.h, which was previously included through asm/module.h. Cc: Al Viro <viro@zeniv.linux.org.uk> Fixes: 88dd4a748da7 ("score: separate extable.h, switch module.h to it") Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2016-10-14fs/super.c: don't fool lockdep in freeze_super() and thaw_super() pathsOleg Nesterov1-12/+25
sb_wait_write()->percpu_rwsem_release() fools lockdep to avoid the false-positives. Now that xfs was fixed by Dave's commit dbad7c993053 ("xfs: stop holding ILOCK over filldir callbacks") we can remove it and change freeze_super() and thaw_super() to run with s_writers.rw_sem locks held; we add two trivial helpers for that, lockdep_sb_freeze_release() and lockdep_sb_freeze_acquire(). xfstests-dev/check `grep -il freeze tests/*/???` does not trigger any warning from lockdep. Signed-off-by: Oleg Nesterov <oleg@redhat.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2016-10-14fs/super.c: fix race between freeze_super() and thaw_super()Oleg Nesterov1-3/+3
Change thaw_super() to check frozen != SB_FREEZE_COMPLETE rather than frozen == SB_UNFROZEN, otherwise it can race with freeze_super() which drops sb->s_umount after SB_FREEZE_WRITE to preserve the lock ordering. In this case thaw_super() will wrongly call s_op->unfreeze_fs() before it was actually frozen, and call sb_freeze_unlock() which leads to the unbalanced percpu_up_write(). Unfortunately lockdep can't detect this, so this triggers misc BUG_ON()'s in kernel/rcu/sync.c. Reported-and-tested-by: Nikolay Borisov <kernel@kyup.com> Signed-off-by: Oleg Nesterov <oleg@redhat.com> Cc: stable@vger.kernel.org Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2016-10-14overlayfs: Fix setting IOP_XATTR flagVivek Goyal1-5/+6
ovl_fill_super calls ovl_new_inode to create a root inode for the new superblock before initializing sb->s_xattr. This wrongly causes IOP_XATTR to be cleared in i_opflags of the new inode, causing SELinux to log the following message: SELinux: (dev overlay, type overlay) has no xattr support Fix this by initializing sb->s_xattr and similar fields before calling ovl_new_inode. Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2016-10-14iov_iter: kernel-doc import_iovec() and rw_copy_check_uvector()Vegard Nossum2-0/+51
Both import_iovec() and rw_copy_check_uvector() take an array (typically small and on-stack) which is used to hold an iovec array copy from userspace. This is to avoid an expensive memory allocation in the fast path (i.e. few iovec elements). The caller may have to check whether these functions actually used the provided buffer or allocated a new one -- but this differs between the too. Let's just add a kernel doc to clarify what the semantics are for each function. Signed-off-by: Vegard Nossum <vegard.nossum@oracle.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2016-10-14CIFS: Retrieve uid and gid from special sid if enabledSteve French1-0/+123
New mount option "idsfromsid" indicates to cifs.ko that it should try to retrieve the uid and gid owner fields from special sids. This patch adds the code to parse the owner sids in the ACL to see if they match, and if so populate the uid and/or gid from them. This is faster than upcalling for them and asking winbind, and is a fairly common case, and is also helpful when cifs.upcall and idmapping is not configured. Signed-off-by: Steve French <steve.french@primarydata.com> Reviewed-by: Shirish Pargaonkar <shirishpargaonkar@gmail.com> Reviewed-by: Jeff Layton <jlayton@redhat.com> Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com>
2016-10-14CIFS: Add new mount option to set owner uid and gid from special sids in aclSteve French4-1/+11
Add "idsfromsid" mount option to indicate to cifs.ko that it should try to retrieve the uid and gid owner fields from special sids in the ACL if present. This first patch just adds the parsing for the mount option. Signed-off-by: Steve French <steve.french@primarydata.com> Reviewed-by: Shirish Pargaonkar <shirishpargaonkar@gmail.com> Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com>
2016-10-14qedr: Add events support and register IB deviceRam Amrani3-2/+158
Add error handling support. Register ib device with ib stack. Signed-off-by: Rajesh Borundia <rajesh.borundia@cavium.com> Signed-off-by: Ram Amrani <Ram.Amrani@cavium.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
2016-10-14qedr: Add GSI supportRam Amrani7-1/+706
Add support for GSI over light L2. Signed-off-by: Rajesh Borundia <rajesh.borundia@cavium.com> Signed-off-by: Ram Amrani <Ram.Amrani@cavium.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
2016-10-14qedr: Add LL2 RoCE interfaceRam Amrani2-2/+34
Add light L2 interface for RoCE. Signed-off-by: Rajesh Borundia <rajesh.borundia@cavium.com> Signed-off-by: Ram Amrani <Ram.Amrani@cavium.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
2016-10-14qedr: Add support for data pathRam Amrani5-1/+1614
Implement fastpath verbs like ib_send_post, ib_post_recv and ib_poll_cq. Signed-off-by: Rajesh Borundia <rajesh.borundia@cavium.com> Signed-off-by: Ram Amrani <Ram.Amrani@cavium.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
2016-10-14qedr: Add support for memory registeration verbsRam Amrani4-1/+425
Add support for user, dma and memory regions registration. Signed-off-by: Rajesh Borundia <rajesh.borundia@cavium.com> Signed-off-by: Ram Amrani <Ram.Amrani@cavium.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
2016-10-14qedr: Add support for QP verbsRam Amrani7-1/+1320
Add support for Queue Pair verbs which adds, deletes, modifies and queries Queue Pairs. Signed-off-by: Rajesh Borundia <rajesh.borundia@cavium.com> Signed-off-by: Ram Amrani <Ram.Amrani@cavium.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
2016-10-14qedr: Add support for PD,PKEY and CQ verbsRam Amrani6-1/+777
Add support for protection domain and completion queue verbs. Signed-off-by: Rajesh Borundia <rajesh.borundia@cavium.com> Signed-off-by: Ram Amrani <Ram.Amrani@cavium.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
2016-10-14qedr: Add support for user context verbsRam Amrani6-1/+622
Add support for ucontext, query port, add and del gid verbs. Signed-off-by: Rajesh Borundia <rajesh.borundia@cavium.com> Signed-off-by: Ram Amrani <Ram.Amrani@cavium.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
2016-10-14qedr: Add support for RoCE HW initRam Amrani4-2/+691
Allocate and setup RoCE resources, interrupts and completion queues. Adds device attributes. Signed-off-by: Rajesh Borundia <rajesh.borundia@cavium.com> Signed-off-by: Ram Amrani <Ram.Amrani@cavium.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
2016-10-14qedr: Add RoCE driver frameworkRam Amrani8-11/+331
Adds a skeletal implementation of the qed* RoCE driver - basically the ability to communicate with the qede driver and receive notifications from it regarding various init/exit events. Signed-off-by: Rajesh Borundia <rajesh.borundia@cavium.com> Signed-off-by: Ram Amrani <Ram.Amrani@cavium.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
2016-10-14pkeys: Remove easily triggered WARNDave Jones1-1/+0
This easy-to-trigger warning shows up instantly when running Trinity on a kernel with CONFIG_X86_INTEL_MEMORY_PROTECTION_KEYS disabled. At most this should have been a printk, but the -EINVAL alone should be more than adequate indicator that something isn't available. Signed-off-by: Dave Jones <davej@codemonkey.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-10-14MIPS: Wire up new pkey_{mprotect,alloc,free} syscallsRalf Baechle5-6/+28
Signed-off-by: Marcin Nowakowski <marcin.nowakowski@imgtec.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/14380/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-10-14ovl: use vfs_get_link()Miklos Szeredi2-49/+7
Resulting in a complete removal of a function basically implementing the inverse of vfs_readlink(). As a bonus, now the proper security hook is also called. Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2016-10-14vfs: add vfs_get_link() helperMiklos Szeredi2-0/+26
This helper is for filesystems that want to read the symlink and are better off with the get_link() interface (returning a char *) rather than the readlink() interface (copy into a userspace buffer). Also call the LSM hook for readlink (not get_link) since this is for symlink reading not following. Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2016-10-14ovl: use generic_readlinkMiklos Szeredi1-20/+1
All filesystems that are backers for overlayfs would also use generic_readlink(). Move this logic to the overlay itself, which is a nice cleanup. Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2016-10-14ovl: explain error values when removing acl from workdirMiklos Szeredi1-0/+13
Suggested-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2016-10-13CIFS: Reset read oplock to NONE if we have mandatory locks after reopenPavel Shilovsky1-0/+9
We are already doing the same thing for an ordinary open case: we can't keep read oplock on a file if we have mandatory byte-range locks because pagereading can conflict with these locks on a server. Fix it by setting oplock level to NONE. Signed-off-by: Pavel Shilovsky <pshilov@microsoft.com> Signed-off-by: Steve French <smfrench@gmail.com>
2016-10-13CIFS: Fix persistent handles re-opening on reconnectPavel Shilovsky2-5/+18
openFileList of tcon can be changed while cifs_reopen_file() is called that can lead to an unexpected behavior when we return to the loop. Fix this by introducing a temp list for keeping all file handles that need to be reopen. Signed-off-by: Pavel Shilovsky <pshilov@microsoft.com> Signed-off-by: Steve French <smfrench@gmail.com>
2016-10-13SMB2: Separate RawNTLMSSP authentication from SMB2_sess_setupSachin Prabhu1-199/+162
We split the rawntlmssp authentication into negotiate and authencate parts. We also clean up the code and add helpers. Signed-off-by: Sachin Prabhu <sprabhu@redhat.com> Signed-off-by: Steve French <smfrench@gmail.com> Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com>
2016-10-13SMB2: Separate Kerberos authentication from SMB2_sess_setupSachin Prabhu1-46/+230
Add helper functions and split Kerberos authentication off SMB2_sess_setup. Signed-off-by: Sachin Prabhu <sprabhu@redhat.com> Signed-off-by: Steve French <smfrench@gmail.com> Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com>
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