The new usb_control_msg_{send|recv}() API provides a more convenient way
of using usb_control_msg() in some usecases. Using this, short reads are
considered as errors, data can be used off the stack, and the need for
the calling function to create a raw usb pipe is eliminated.
This patch series aims to update existing instances of usb_control_msg()
in drivers/usb/misc/* to usb_control_msg_{send|recv}() appropriately
wherever it would be a good fit, and also update the return value
checking mechanisms in place (if any), as necessary so nothing breaks.
Changes in v4:
* Drop all proposed changes to drivers (from v3) where the new API
doesn't fit appropriately.
* Update commit messages.
* Link to v3:
https://lore.kernel.org/linux-usb/YBF9exziI12OCSuA@xxxxxxxxxxxxxxxxxxxx/T/#m269ab33b52331c134bbbc77d13cb65c2194a6093
Changes in v3:
* idmouse, emi26 and emi62 are left unchanged, and are not updated.
-> since control transfers in idmouse are without a data stage, there's no
real advantage in using the new helper here.
-> in emi26, and emi62, FW_LOAD_SIZE = 1048 (> 1024). Thus, if we try to use the
new helpers, it will result in either build warnings, or memory being allocated.
* Link to v2:
https://lore.kernel.org/linux-usb/20201130013103.2580467-1-anant.thazhemadam@xxxxxxxxx/T/
Changes in v2:
* Buffer variables that were previously dynamically allocated are no
longer dynamically allocated unless they have a variable length
(since that threw a warning).
* Link to v1:
https://lore.kernel.org/linux-usb/20201129160612.1908074-1-anant.thazhemadam@xxxxxxxxx/
Anant Thazhemadam (3):
usb: misc: ehset: update to use the usb_control_msg_{send|recv}() API
usb: misc: ezusb: update to use usb_control_msg_send()
usb: misc: usbsevseg: update to use usb_control_msg_send()
drivers/usb/misc/ehset.c | 76 +++++++++++++++---------------------
drivers/usb/misc/ezusb.c | 16 +-------
drivers/usb/misc/usbsevseg.c | 60 ++++++++--------------------
3 files changed, 51 insertions(+), 101 deletions(-)
--
2.25.1
