• Hans de Goede's avatar
    [media] pwc: Use one shared usb command buffer · 24be689b
    Hans de Goede authored
    The pwc driver used to:
    1. kmalloc a buffer
    2. memcpy data to send over usb there
    3. do the usb_control_msg call (which does not work with data on the stack)
    4. free the buffer
    
    For every usb command send. This patch changes the code to instead malloc
    a buffer for this purpose once and use it everywhere.
    
    [mchehab@redhat.com: Fix a compilation breakage with allyesconfig:
     drivers/media/video/pwc/pwc-ctrl.c: In function ‘pwc_get_cmos_sensor’:
     drivers/media/video/pwc/pwc-ctrl.c:546:3: warning: passing argument 4 of ‘recv_control_msg’ makes integer from pointer without a cast [en$
     drivers/media/video/pwc/pwc-ctrl.c:107:12: note: expected ‘int’ but argument is of type ‘unsigned char *’
     drivers/media/video/pwc/pwc-ctrl.c:546:3: error: too many arguments to function ‘recv_control_msg’
     drivers/media/video/pwc/pwc-ctrl.c:107:12: note: declared here]
    Signed-off-by: default avatarHans de Goede <hdegoede@redhat.com>
    Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@redhat.com>
    24be689b
pwc-dec1.c 1.33 KB