usb: raw-gadget: Fix copy_to/from_user() checks

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The copy_to/from_user() functions return the number of bytes remaining
but we want to return negative error codes.  I changed a couple checks
in raw_ioctl_ep_read() and raw_ioctl_ep0_read() to show that we still
we returning zero on error.

Fixes: f2c2e71764 ("usb: gadget: add raw-gadget interface")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Andrey Konovalov <andreyknvl@google.com>
Tested-by: Andrey Konovalov <andreyknvl@google.com>
Link: https://lore.kernel.org/r/20200406145119.GG68494@mwanda
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Dan Carpenter 2020-04-06 17:51:19 +03:00 • committed by Greg Kroah-Hartman

parent 97341ef707

commit 068fbff4f8

1 changed files with 22 additions and 24 deletions

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drivers/usb/gadget/legacy/raw_gadget.c

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