wifi: plfxlc: check for allocation failure in plfxlc_usb_wreq_async()

[ Upstream commit 40018a8fa9aa63ca5b26e803502138158fb0ff96 ]

Check for if the usb_alloc_urb() failed.

Fixes: 68d57a07bfe5 ("wi

wifi: plfxlc: check for allocation failure in plfxlc_usb_wreq_async()

[ Upstream commit 40018a8fa9aa63ca5b26e803502138158fb0ff96 ]

Check for if the usb_alloc_urb() failed.

Fixes: 68d57a07bfe5 ("wireless: add plfxlc driver for pureLiFi X, XL, XC devices")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/e8d4a19a-f251-4101-a89b-607345e938cb@moroto.mountain
Signed-off-by: Sasha Levin <sashal@kernel.org>

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wifi: plfxlc: fix clang-specific fortify warning

[ Upstream commit a763e92c78615ea838f5b9a841398b1d4adb968e ]

When compiling with clang 16.0.6 and CONFIG_FORTIFY_SOURCE=y, I've
noticed the followin

wifi: plfxlc: fix clang-specific fortify warning

[ Upstream commit a763e92c78615ea838f5b9a841398b1d4adb968e ]

When compiling with clang 16.0.6 and CONFIG_FORTIFY_SOURCE=y, I've
noticed the following (somewhat confusing due to absence of an actual
source code location):

In file included from drivers/net/wireless/purelifi/plfxlc/mac.c:6:
In file included from ./include/linux/netdevice.h:24:
In file included from ./include/linux/timer.h:6:
In file included from ./include/linux/ktime.h:24:
In file included from ./include/linux/time.h:60:
In file included from ./include/linux/time32.h:13:
In file included from ./include/linux/timex.h:67:
In file included from ./arch/x86/include/asm/timex.h:5:
In file included from ./arch/x86/include/asm/processor.h:23:
In file included from ./arch/x86/include/asm/msr.h:11:
In file included from ./arch/x86/include/asm/cpumask.h:5:
In file included from ./include/linux/cpumask.h:12:
In file included from ./include/linux/bitmap.h:11:
In file included from ./include/linux/string.h:254:
./include/linux/fortify-string.h:592:4: warning: call to '__read_overflow2_field'
declared with 'warning' attribute: detected read beyond size of field (2nd
parameter); maybe use struct_group()? [-Wattribute-warning]
__read_overflow2_field(q_size_field, size);

The compiler actually complains on 'plfxlc_get_et_strings()' where
fortification logic inteprets call to 'memcpy()' as an attempt to copy
the whole 'et_strings' array from its first member and so issues an
overread warning. This warning may be silenced by passing an address
of the whole array and not the first member to 'memcpy()'.

Signed-off-by: Dmitry Antipov <dmantipov@yandex.ru>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20230829094541.234751-1-dmantipov@yandex.ru
Signed-off-by: Sasha Levin <sashal@kernel.org>

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