| Message ID | 20201124063613.28796-1-min.guo@mediatek.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [v2] usb: musb: remove unused variable 'devctl' | expand |
On Tue, Nov 24, 2020 at 02:36:13PM +0800, min.guo@mediatek.com wrote: > From: Min Guo <min.guo@mediatek.com> > > 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@mediatek.com> > --- > 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 | 4 +--- > 1 file changed, 1 insertion(+), 3 deletions(-) > > diff --git a/drivers/usb/musb/musbhsdma.c b/drivers/usb/musb/musbhsdma.c > index 0aacfc8be5a1..f59a009c533e 100644 > --- a/drivers/usb/musb/musbhsdma.c > +++ b/drivers/usb/musb/musbhsdma.c > @@ -321,8 +321,6 @@ irqreturn_t dma_controller_irq(int irq, void *private_data) > musb_channel->channel.status = > MUSB_DMA_STATUS_BUS_ABORT; > } else { > - u8 devctl; > - > addr = musb_read_hsdma_addr(mbase, > bchannel); > channel->actual_len = addr > @@ -336,7 +334,7 @@ irqreturn_t dma_controller_irq(int irq, void *private_data) > < musb_channel->len) ? > "=> reconfig 0" : "=> complete"); > > - devctl = musb_readb(mbase, MUSB_DEVCTL); > + (void)musb_readb(mbase, MUSB_DEVCTL); Please put a comment here as to why the read is happening so that people do not throw it away sometime in the future. thanks, greg k-h
diff --git a/drivers/usb/musb/musbhsdma.c b/drivers/usb/musb/musbhsdma.c index 0aacfc8be5a1..f59a009c533e 100644 --- a/drivers/usb/musb/musbhsdma.c +++ b/drivers/usb/musb/musbhsdma.c @@ -321,8 +321,6 @@ irqreturn_t dma_controller_irq(int irq, void *private_data) musb_channel->channel.status = MUSB_DMA_STATUS_BUS_ABORT; } else { - u8 devctl; - addr = musb_read_hsdma_addr(mbase, bchannel); channel->actual_len = addr @@ -336,7 +334,7 @@ irqreturn_t dma_controller_irq(int irq, void *private_data) < musb_channel->len) ? "=> reconfig 0" : "=> complete"); - devctl = musb_readb(mbase, MUSB_DEVCTL); + (void)musb_readb(mbase, MUSB_DEVCTL); channel->status = MUSB_DMA_STATUS_FREE;