On Tue, Nov 24, 2020 at 12:13:42PM +0300, Sergei Shtylyov wrote: > Hello! > > On 24.11.2020 11:49, min.guo@xxxxxxxxxxxx wrote: > > > From: Min Guo <min.guo@xxxxxxxxxxxx> > > > > Remove unused 'devctl' variable to fix compile warnings: > > > > drivers/usb/musb/musbhsdma.c: In function 'dma_controller_irq': > > drivers/usb/musb/musbhsdma.c:324:8: warning: variable 'devctl' set > > but not used [-Wunused-but-set-variable] > > > > Signed-off-by: Min Guo <min.guo@xxxxxxxxxxxx> > > --- > > changes in v3 > > suggested by Greg Kroah-Hartman: > > Add a comment. > > > > changes in v2 > > suggested by Alan Stern: > > Add void before musb_read to indicate that the register MUSB_DEVCTL > > was intended to be read and discarded. > > --- > > drivers/usb/musb/musbhsdma.c | 8 +++++--- > > 1 file changed, 5 insertions(+), 3 deletions(-) > > > > diff --git a/drivers/usb/musb/musbhsdma.c b/drivers/usb/musb/musbhsdma.c > > index 0aacfc8be5a1..2a345b4ad015 100644 > > --- a/drivers/usb/musb/musbhsdma.c > > +++ b/drivers/usb/musb/musbhsdma.c > [...] > > @@ -336,7 +334,11 @@ irqreturn_t dma_controller_irq(int irq, void *private_data) > > < musb_channel->len) ? > > "=> reconfig 0" : "=> complete"); > > - devctl = musb_readb(mbase, MUSB_DEVCTL); > > + /* > > + * Some hardware may need to read the > > + * MUSB_DEVCTL register once to take effect. > > + */ > > + (void)musb_readb(mbase, MUSB_DEVCTL); > > Hm, forcibly reading DevCtl in the DMA driver... sounds quite > nonsensically. Lemme take a look... What happened to your look? thanks, greg k-h
