commit b17884ccf2 upstream.
Fix to return a negative error code from the error handling
case instead of 0, as done elsewhere in this function. Also
removed var 'rv' since we can use 'err' instead.
Fixes: 7dc7967fc3 ("staging: kpc2000: add initial set of Daktronics drivers")
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Cc: stable <stable@vger.kernel.org>
Reviewed-by: Dan Carpenter <dan.carpenter@oracle.com>
Link: https://lore.kernel.org/r/20200506134735.102041-1-weiyongjun1@huawei.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 72db61d7d1 upstream.
This function should not allow negative values of "wr_val". If
negatives are allowed then capping the upper bound at 7 is
meaningless. Let's make it unsigned.
Fixes: 7dc7967fc3 ("staging: kpc2000: add initial set of Daktronics drivers")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Cc: stable <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20200224103325.hrxdnaeqsthplu42@kili.mountain
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
It fixed following warning in kpc2000 driver
"constant XXXX is so big it is unsigned long"
Signed-off-by: Harsh Jain <harshjain32@gmail.com>
Link: https://lore.kernel.org/r/20190831115532.2398-1-harshjain32@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This reverts commit 8e7cb7352e.
Bharath writes:
Could you drop this patch from the staging-next tree? This is
because John is making some changes to the put_user_page*()
functions. He has submitted a patch recently removing
put_user_page_dirty() function which is being used in this
patch. This might break the kernel build if John's patch gets
merged in.
I ll submit a patch once the put_user_page*() apis are fixed.
Reported-by: Bharath Vedartham <linux.bhar@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
For pages that were retained via get_user_pages*(), release those pages
via the new put_user_page*() routines, instead of via put_page().
This is part a tree-wide conversion, as described in commit fc1d8e7cca
("mm: introduce put_user_page*(), placeholder versions").
Cc: Ira Weiny <ira.weiny@intel.com>
Cc: John Hubbard <jhubbard@nvidia.com>
Cc: Jérôme Glisse <jglisse@redhat.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Matt Sickler <Matt.Sickler@daktronics.com>
Cc: devel@driverdev.osuosl.org
Cc: linux-kernel@vger.kernel.org
Cc: linux-mm@kvack.org
Reviewed-by: John Hubbard <jhubbard@nvidia.com>
Signed-off-by: Bharath Vedartham <linux.bhar@gmail.com>
Link: https://lore.kernel.org/r/1564058658-3551-1-git-send-email-linux.bhar@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Fixes issues found by checkpatch:
- "WARNING: braces {} are not necessary for single statement blocks"
- "WARNING: braces {} are not necessary for any arm of this statement"
Signed-off-by: Simon Sandström <simon@nikanor.nu>
Link: https://lore.kernel.org/r/20190701091819.18528-1-simon@nikanor.nu
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The i2c-dev module is for access to I2C buses from user-space.
Kernel drivers do not care about its presence.
Signed-off-by: Jean Delvare <jdelvare@suse.de>
Cc: Matt Sickler <Matt.Sickler@daktronics.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The unconditioned jump will prohibit to ever reach the break-statement.
Deleting this needless statement, the code becomes more understandable.
Signed-off-by: Fabian Krueger <fabian.krueger@fau.de>
Signed-off-by: Michael Scheiderer <michael.scheiderer@fau.de>
Cc: <linux-kernel@i4.cs.fau.de>
Reviewed-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Instead of using the function name hard coded as string, using __func__
and the '%s'-placeholder will always give the current name of the
function. When renaming a function, the debugging-messages won't have to
be rewritten.
Signed-off-by: Fabian Krueger <fabian.krueger@fau.de>
Signed-off-by: Michael Scheiderer <michael.scheiderer@fau.de>
Cc: <linux-kernel@i4.cs.fau.de>
Reviewed-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Replaced 'unsigned' with it's equivalent 'unsigned int' to reduce
confusion while reading the code.
Signed-off-by: Fabian Krueger <fabian.krueger@fau.de>
Signed-off-by: Michael Scheiderer <michael.scheiderer@fau.de>
Cc: <linux-kernel@i4.cs.fau.de>
Reviewed-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Replaced __attribute__((packed)) with __packed. Both ways of attributing
are equivalent, but being shorter, __packed should be preferred.
This refactoring makes the core more readable.
Signed-off-by: Fabian Krueger <fabian.krueger@fau.de>
Signed-off-by: Michael Scheiderer <michael.scheiderer@fau.de>
Cc: <linux-kernel@i4.cs.fau.de>
Reviewed-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
After the declarations in a function, there should be a blank line, so
that the declaration part is visibly separated from the rest.
This refactoring makes the code more readable.
Signed-off-by: Fabian Krueger <fabian.krueger@fau.de>
Signed-off-by: Michael Scheiderer <michael.scheiderer@fau.de>
Cc: <linux-kernel@i4.cs.fau.de>
Reviewed-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To fix some checkpatch-warnings some lines of this module had to be
shortened so that they do not exceed 80 characters per line.
This refactoring makes the code more readable.
Signed-off-by: Fabian Krueger <fabian.krueger@fau.de>
Signed-off-by: Michael Scheiderer <michael.scheiderer@fau.de>
Cc: <linux-kernel@i4.cs.fau.de>
Reviewed-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Fixes checkpatch errors:
- spaces required around that '=' (ctx:VxV)
- space required before the open parenthesis '('
- spaces preferred around that '-' (ctx:VxV)
- space required before the open brace '{'
Signed-off-by: Simon Sandström <simon@nikanor.nu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Remove .owner field if calls are used which set it automatically
Generated by: scripts/coccinelle/api/platform_no_drv_owner.cocci
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Currently there are several left shifts that are assigned to 64 bit
unsigned longs where a signed int 1 is being shifted, resulting in
an integer overflow. Fix this bit using the BIT_ULL macro to perform
a 64 bit shift. Also clean up an overly long statement.
Addresses-Coverity: ("Unintentional integer overflow")
Fixes: 7dc7967fc3 ("staging: kpc2000: add initial set of Daktronics drivers")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
We can get rid of a few iounmaps in the middle of the function by
re-ordering the error handling labels and adding two new labels.
Signed-off-by: Simon Sandström <simon@nikanor.nu>
Reviewed-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Fixes checkpatch warning: "Consider removing the code enclosed by
this #if 0 and its #endif".
Signed-off-by: Simon Sandström <simon@nikanor.nu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The existing implementation for doing DMA via asynchronous IO didn't
work and there was no longer a use-case for it. Removed it.
Fixed a few checkpatch warnings about too-long lines and extraneous
braces in the process.
Reported-by: Matt Sickler <matt.sickler@daktronics.com>
Signed-off-by: Jeremy Sowden <jeremy@azazel.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Much of the code comments in kp2000_pcie_probe just repeats the code and
does not add any additional information. Delete them and make sure that
comments still left in the function all use the same style.
Signed-off-by: Simon Sandström <simon@nikanor.nu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Use self-explanatory label names instead of the generic numbered ones,
to make it easier to follow and understand the code.
Signed-off-by: Simon Sandström <simon@nikanor.nu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Fix sparse warnings:
drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.c:46:6: warning: symbol 'kpc_dma_del_device' was not declared. Should it be static?
drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.c:84:1: warning: symbol 'dev_attr_engine_regs' was not declared. Should it be static?
drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.c:91:14: warning: symbol 'kpc_dma_class' was not declared. Should it be static?
drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.c:199:24: warning: symbol 'kpc_dma_plat_driver_i' was not declared. Should it be static?
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This patch removes the Sparse generated warnings. Following warnings are reported by Sparse:
drivers/staging/kpc2000//kpc_dma/kpc_dma_driver.c:46:6: warning: symbol 'kpc_dma_del_device' was not declared. Should it be static?
drivers/staging/kpc2000//kpc_dma/kpc_dma_driver.c:91:14: warning: symbol 'kpc_dma_class' was not declared. Should it be static?
drivers/staging/kpc2000//kpc_dma/kpc_dma_driver.c:199:24: warning: symbol 'kpc_dma_plat_driver_i' was not declared. Should it be static?
Signed-off-by: Rishiraj Manwatkar <manwatkar@outlook.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Debug prints that are used only to inform about function entry or exit
can be removed as ftrace can be used to get this information.
Signed-off-by: Simon Sandström <simon@nikanor.nu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Debug prints that are used only to inform about function entry or exit
can be removed as ftrace can be used to get this information.
Signed-off-by: Simon Sandström <simon@nikanor.nu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Debug prints that are used only to inform about function entry or exit
can be removed as ftrace can be used to get this information.
Signed-off-by: Simon Sandström <simon@nikanor.nu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Debug prints that are used only to inform about function entry or exit
can be removed as ftrace can be used to get this information.
Signed-off-by: Simon Sandström <simon@nikanor.nu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Debug prints that are used only to inform about function entry or exit
can be removed as ftrace can be used to get this information.
Signed-off-by: Simon Sandström <simon@nikanor.nu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Since whitespace should not appear between asterisk and
variable name in a declaration statement, remove it and
fix checkpatch.pl error "foo * bar" should be "foo *bar".
Signed-off-by: Naoto Kobayashi <naoto.kobayashi4c@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The kpc_spi driver unnecessarily casts from a (u64 __iomem *) to a (void
*) when invoking readq and writeq which both take a (void __iomem *) arg.
There is no need for this cast, and it actually harms us by discarding
the sparse cookie, __iomem. Make the driver stop performing this casting
operation.
Signed-off-by: Geordan Neukum <gneukum1@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The kpc_spi driver stashes off an unsigned long representation of the
i/o mapping returned by devm_ioremap_nocache(). This is unnecessary, as
the only use of the unsigned long repr is to eventually be re-cast to
an (u64 __iomem *). Instead of casting the (void __iomem *) to an
(unsigned long) then a (u64 __iomem *), just remove this intermediate
step. As this intermediary is no longer used, also remove it from its
structure.
Signed-off-by: Geordan Neukum <gneukum1@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The structure kp_spi_controller_state, defined in the kpc2000_spi
driver, contains a member named chip_select which is never used after
initialization. Therefore, it should be removed for simplicity's sake.
Signed-off-by: Geordan Neukum <gneukum1@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The structure kp_spi_controller_state, defined in the kpc2000_spi
driver, contains a member named word_len which is never used after
initialization. Therefore, it should be removed for simplicity's sake.
Signed-off-by: Geordan Neukum <gneukum1@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The structure kpc_spi, defined in in the kpc2000_spi driver, contains
a member named pin_dir which is never used after initialization.
Therefore, it should be removed for simplicity's sake.
Signed-off-by: Geordan Neukum <gneukum1@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The structure kp_spi_controller_state, defined in the kpc2000_spi
driver, contains a member named phys which is never used after
initialization. Therefore, it should be removed for simplicity's sake.
Signed-off-by: Geordan Neukum <gneukum1@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
In order to print a 'size_t' type the '%zu' specifier needs to be used.
Change it accordingly in order to fix the following build warning:
drivers/staging/kpc2000/kpc_dma/fileops.c:57:35: warning: format '%ld' expects argument of type 'long int', but argument 8 has type 'size_t {aka unsigned int}' [-Wformat=]
Reported-by: Build bot for Mark Brown <broonie@kernel.org>
Signed-off-by: Fabio Estevam <festevam@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
In order to print a 'long long int' type the 'llx' specifier needs to be
used.
Change it accordingly in order to fix the following build warning:
drivers/staging/kpc2000/kpc2000/core.c:245:4: warning: format '%lx' expects argument of type 'long unsigned int', but argument 4 has type 'long long int' [-Wformat=]
Reported-by: Build bot for Mark Brown <broonie@kernel.org>
Signed-off-by: Fabio Estevam <festevam@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This was reported by sparse:
drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.c:39:7: warning: symbol 'kpc_dma_add_device
' was not declared. Should it be static?
Signed-off-by: Valerio Genovese <valerio.click@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Step 11 was removed from kp2000_pcie_probe in a previous commit but the
comment was not changed to reflect this, so do it now.
Signed-off-by: Simon Sandström <simon@nikanor.nu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Fixes checkpatch.pl warning "Prefer using '"%s...", __func__' to using
'<function name>', this function's name, in a string".
Signed-off-by: Simon Sandström <simon@nikanor.nu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Wei Yongjun
Dan Carpenter
Harsh Jain
Eduardo Barretto
Greg Kroah-Hartman
Bharath Vedartham
YueHaibing
Simon Sandström
Jean Delvare
Fabian Krueger
Colin Ian King
Jeremy Sowden
Rishiraj Manwatkar
Naoto Kobayashi
Hao Xu
Geordan Neukum
Fabio Estevam
Valerio Genovese