Clang warns:

drivers/staging/rtl8192u/ieee80211/ieee80211_softmac.c:2663:47: warning:
address of array 'param->u.wpa_ie.data' will always evaluate to 'true'
[-Wpointer-bool-conversion]
            (param->u.wpa_ie.len && !param->u.wpa_ie.data))
                                    ~~~~~~~~~~~~~~~~~^~~~

This was exposed by commit deabe035 ("Staging: rtl8192u: ieee80211:
Use !x in place of NULL comparisons") because we disable the warning
that would have pointed out the comparison against NULL is also false:

drivers/staging/rtl8192u/ieee80211/ieee80211_softmac.c:2663:46: warning:
comparison of array 'param->u.wpa_ie.data' equal to a null pointer is
always false [-Wtautological-pointer-compare]
            (param->u.wpa_ie.len && param->u.wpa_ie.data == NULL))
                                    ~~~~~~~~~~~~~~~~^~~~    ~~~~

Remove it so clang no longer warns.

Link: https://github.com/ClangBuiltLinux/linux/issues/487Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

All the attribute show call-backs check whether pcard is NULL.  However,
pci_set_drvdata(pdev, pcard) is called before the sysfs files are
created during probe, and pci_set_drvdata(pdev, NULL) is not called
until after they are destroyed during remove; therefore, pcard will not
be NULL, and we can drop the checks.
Signed-off-by: Jeremy Sowden <jeremy@azazel.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

All the call-backs used the same formula to retrieve the pcard from dev:

  struct pci_dev *pdev = to_pci_dev(dev);
  struct kp2000_device *pcard;

  if (!pdev)
    return NULL;

  pcard = pci_get_drvdata(pdev);

Since to_pci_dev is a wrapper for container_of, it will not return NULL,
and since pci_get_drvdata just calls dev_get_drvdata on the dev member
of pdev, this is equivalent to:

  struct kp2000_device *pcard = dev_get_drvdata(&(container_of(dev, struct pci_dev, dev)->dev));

and we can simplify it to:

  struct kp2000_device *pcard = dev_get_drvdata(dev);
Signed-off-by: Jeremy Sowden <jeremy@azazel.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Previously the next card number was assigned from a static int local
variable.  Replaced it with an IDA.  Avoids the assignment of ever-
increasing card-numbers by allowing them to be reused.

Updated TODO.

Corrected format-specifier for unsigned pcard->card_num.
Signed-off-by: Jeremy Sowden <jeremy@azazel.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: kpc2000: added separate show functions for readable kp device attributes, defined them as read-only, and declared them static.

Defined separate simple show functions for each attribute instead of
having a one big one containing a chain of conditionals.

Replaced calls to scnprintf with sprintf since all the outputs are
single integers.

All the readable device attributes are read-only, so used DEVICE_ATTR_RO
to define them.

The definitions are only used to populate the kp_attr_list attribute
array, so declared them as static.

Fixes the following sparse warnings:

  drivers/staging/kpc2000/kpc2000/core.c:152:1: warning: symbol 'dev_attr_ssid' was not declared. Should it be static?
  drivers/staging/kpc2000/kpc2000/core.c:153:1: warning: symbol 'dev_attr_ddna' was not declared. Should it be static?
  drivers/staging/kpc2000/kpc2000/core.c:154:1: warning: symbol 'dev_attr_card_id' was not declared. Should it be static?
  drivers/staging/kpc2000/kpc2000/core.c:155:1: warning: symbol 'dev_attr_hw_rev' was not declared. Should it be static?
  drivers/staging/kpc2000/kpc2000/core.c:156:1: warning: symbol 'dev_attr_build' was not declared. Should it be static?
  drivers/staging/kpc2000/kpc2000/core.c:157:1: warning: symbol 'dev_attr_build_date' was not declared. Should it be static?
  drivers/staging/kpc2000/kpc2000/core.c:158:1: warning: symbol 'dev_attr_build_time' was not declared. Should it be static?
  drivers/staging/kpc2000/kpc2000/core.c:159:1: warning: symbol 'dev_attr_cpld_reg' was not declared. Should it be static?
  drivers/staging/kpc2000/kpc2000/core.c:161:1: warning: symbol 'dev_attr_cpld_reconfigure' was not declared. Should it be static?
Signed-off-by: Jeremy Sowden <jeremy@azazel.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

The attribute call-backs all use the same formula to get the pcard from
dev:

  struct pci_dev *pdev = to_pci_dev(dev);
  struct kp2000_device *pcard;

  if (!pdev)
    return -ENXIO;
  pcard = pci_get_drvdata(pdev);
  if (!pcard)
    return -ENXIO;

Added a function to reduce the duplicated code.
Signed-off-by: Jeremy Sowden <jeremy@azazel.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

  * Indented with tabs.
  * Broke lines over 80 columns where possible.
  * Removed braces from one-statement blocks.
  * Tidied up some comments.
  * Removed multiple blank lines.
Signed-off-by: Jeremy Sowden <jeremy@azazel.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Fix the following Coverity warning:

File: drivers/staging/rtl8723bs/os_dep/ioctl_linux.c in function
rtw_dbg_port():

CID 18480: Operands don't affect result (CONSTANT_EXPRESSION_RESULT)
dead_error_condition: The condition (extra_arg & 7U) > 7U cannot be true.

        if ((extra_arg & 0x07) > 0x07)
                padapter->driver_ampdu_spacing = 0xFF;
        else
                padapter->driver_ampdu_spacing = extra_arg;
Reported-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

The masking update of pkg_offset is redundant as the updated
value is never read and pkg_offset is re-assigned on the next
iteration of the loop.  Clean this up by removing the redundant
assignment.

Addresses-Coverity: ("Unused value")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Reviewed-by: Adham Abozaeid <adham.abozaeid@microchip.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

The arcx-anybus's registers are accessed via a memory-mapped
IO region. A regmap associated with this region is created
using custom reg_read() / reg_write() callbacks.

However, an abstraction which creates a memory-mapped IO
region backed regmap already exists: devm_regmap_init_mmio().

Replace the custom regmap with the existing kernel abstraction.
As a pleasant side-effect, sparse warnings now disappear.
Signed-off-by: Sven Van Asbroeck <TheSven73@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Change (x == NULL) to !x and (x != NULL) to x, to fix
following checkpatch.pl warnings:
CHECK: Comparison to NULL could be written "!x".
Signed-off-by: Puranjay Mohan <puranjay12@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Change comparison to zero to !x.
Replace (x == 0) to !x.
Signed-off-by: Puranjay Mohan <puranjay12@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Use "%s", __func__ in place of strings which contain function names.
Signed-off-by: Puranjay Mohan <puranjay12@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Remove functions which just print the name of function and return 0,
These functions fake the network core to say that they support these
options.
Signed-off-by: Puranjay Mohan <puranjay12@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

The show functions of two attributes output nothing and they are unused.
Removed them.
Signed-off-by: Jeremy Sowden <jeremy@azazel.net>
Reported-by: Matt Sickler <matt.sickler@daktronics.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: kpc2000: added separate show functions for kpc_uio_class device attributes, defined them as read-only and declared them static.

Defined separate simple show functions for each attribute instead of
having a one big one containing a chain of conditionals.

Replaced scnprintf calls with sprintf since all the outputs are short
bounded strings or single integers.

All of the device attributes are read-only, so used DEVICE_ATTR_RO to
define them.

The definitions are only used to populate the kpc_uio_class_attrs
attribute array, so declared them as static.

Fixes the following sparse warnings:

  drivers/staging/kpc2000/kpc2000/cell_probe.c:220:1: warning: symbol 'dev_attr_offset' was not declared. Should it be static?
  drivers/staging/kpc2000/kpc2000/cell_probe.c:221:1: warning: symbol 'dev_attr_size' was not declared. Should it be static?
  drivers/staging/kpc2000/kpc2000/cell_probe.c:222:1: warning: symbol 'dev_attr_type' was not declared. Should it be static?
  drivers/staging/kpc2000/kpc2000/cell_probe.c:223:1: warning: symbol 'dev_attr_s2c_dma' was not declared. Should it be static?
  drivers/staging/kpc2000/kpc2000/cell_probe.c:224:1: warning: symbol 'dev_attr_c2s_dma' was not declared. Should it be static?
  drivers/staging/kpc2000/kpc2000/cell_probe.c:225:1: warning: symbol 'dev_attr_irq_count' was not declared. Should it be static?
  drivers/staging/kpc2000/kpc2000/cell_probe.c:226:1: warning: symbol 'dev_attr_irq_base_num' was not declared. Should it be static?
  drivers/staging/kpc2000/kpc2000/cell_probe.c:227:1: warning: symbol 'dev_attr_core_num' was not declared. Should it be static?
Signed-off-by: Jeremy Sowden <jeremy@azazel.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Remove local variable psdio which is declared but not used (or returned)
in its function.
Issue found with Coccinelle.
Signed-off-by: Nishka Dasgupta <nishka.dasgupta@yahoo.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Check for error during device initialization callback and return a
meaningful error code or zero on success.
Signed-off-by: Quentin Deslandes <quentin.deslandes@itdev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Avoid discarding function's return code during register initialization.
Handle it instead and return 0 on success or a negative errno value on
error.
Signed-off-by: Quentin Deslandes <quentin.deslandes@itdev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Check on called function's returned value for error and return 0 on
success or a negative errno value on error instead of a boolean value.
Signed-off-by: Quentin Deslandes <quentin.deslandes@itdev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Avoid discarding return value of functions called during firmware
management process. Handle such return value and return 0 on success or
a negative errno value on error.
Signed-off-by: Quentin Deslandes <quentin.deslandes@itdev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Change some of the driver's functions in order to handle error codes
instead of discarding them. These function now returns 0 on success and
a negative errno value on error.
Signed-off-by: Quentin Deslandes <quentin.deslandes@itdev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Avoid discarding called function's returned value. Store it instead in
order to act accordingly.

Update error path to return 0 on success and a negative errno value on
error.
Signed-off-by: Quentin Deslandes <quentin.deslandes@itdev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

vnt_free_tx_bufs() relies on priv->tx_context elements to be NULL if
they are not initialized (as vnt_free_rx_bufs() does). Add a check to
these elements in order to avoid NULL pointer dereference.
Signed-off-by: Quentin Deslandes <quentin.deslandes@itdev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Fix following checkpatch.pl warning by adding braces around if
statement:
CHECK: braces {} should be used on all arms of this statement
Signed-off-by: Puranjay Mohan <puranjay12@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Remove else after break statements to fix following checkpatch.pl
warnings:
WARNING: else is not generally useful after a break or return.
Signed-off-by: Puranjay Mohan <puranjay12@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Fixes the misspelling of packet in
<MASK_PACKETCONFIG1_PAKET_FORMAT_VARIABLE>
Signed-off-by: Yannick Loeck <yannick.loeck@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

As this is only called twice, just call writel() like a normal driver
should :)

At the same time, clean up the formatting for the irq handler, as there
is no need to have that be incorrect, it just hurts the eyes...

Cc: Matt Sickler <Matt.Sickler@daktronics.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

The functions GetBackEndStatus() and BackEndControlSetClear() are never
used by any code, so just remove them.

Cc: Matt Sickler <Matt.Sickler@daktronics.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

There is no need for a subdirectory for just a single .c file.  So move
it out of kpc_i2c/ and rename it to the module name that we want the
file to build to, saving one more linking stage.

Cc: Matt Sickler <Matt.Sickler@daktronics.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

There is no need for a subdirectory for just a single .c file.  So move
it out of kpc_spi/ and rename it to the module name that we want the
file to build to, saving one more linking stage.

Cc: Matt Sickler <Matt.Sickler@daktronics.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

The structures defined in spi_parts.h belong in the .c file that uses
it.  So move it directly into spi_driver.c to make things simpler to
manage.

Cc: Matt Sickler <Matt.Sickler@daktronics.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Use tabs in pcie.h, like is mandated.

Cc: Matt Sickler <Matt.Sickler@daktronics.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

The fileops.c file does not need to be stand-alone, so move it into the
core.c file.  This lets us make some functions static, reducing the
global namespace of the driver.

Cc: Matt Sickler <Matt.Sickler@daktronics.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Fix following checkpatch.pl warning by removing unnecessary braces:
WARNING: braces {} are not necessary for single statement blocks
Signed-off-by: Puranjay Mohan <puranjay12@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

  - Resolve the following warning from the Kconfig,
    "WARNING: prefer 'help' over '---help---' for new help texts"
Signed-off-by: Moses Christopher <moseschristopherb@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

  - Resolve the following warning from the Kconfig,
    "WARNING: prefer 'help' over '---help---' for new help texts"
Signed-off-by: Moses Christopher <moseschristopherb@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

  - Resolve the following warning from the Kconfig,
    "WARNING: prefer 'help' over '---help---' for new help texts"
Signed-off-by: Moses Christopher <moseschristopherb@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

  - Resolve the following warning from the Kconfig,
    "WARNING: prefer 'help' over '---help---' for new help texts"
Signed-off-by: Moses Christopher <moseschristopherb@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

  - Resolve the following warning from the Kconfig,
    "WARNING: prefer 'help' over '---help---' for new help texts
Signed-off-by: Moses Christopher <moseschristopherb@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>