On Mon, Jul 13, 2020 at 04:16:07PM +0300, Dan Carpenter wrote:
> On Sun, Jul 12, 2020 at 03:38:21PM +0300, Ivan Safonov wrote:
> > Remove unused members of struct xmit_buf: alloc_sz, ff_hwaddr,
> > dma_transfer_addr, bpending and last.
> >
> > Signed-off-by: Ivan Safonov <insafo...@gmail.com>
> > ---
> > drivers/staging/rtl8188eu/include/rtw_xmit.h | 5 -----
> > drivers/staging/rtl8188eu/os_dep/xmit_linux.c | 1 -
> > 2 files changed, 6 deletions(-)
> >
> > diff --git a/drivers/staging/rtl8188eu/include/rtw_xmit.h
> > b/drivers/staging/rtl8188eu/include/rtw_xmit.h
> > index 12d16e98176a..3c03987c81a1 100644
> > --- a/drivers/staging/rtl8188eu/include/rtw_xmit.h
> > +++ b/drivers/staging/rtl8188eu/include/rtw_xmit.h
> > @@ -193,14 +193,9 @@ struct xmit_buf {
> > void *priv_data;
> > u16 ext_tag; /* 0: Normal xmitbuf, 1: extension xmitbuf. */
> > u16 flags;
> > - u32 alloc_sz;
> > u32 len;
> > struct submit_ctx *sctx;
> > - u32 ff_hwaddr;
> > struct urb *pxmit_urb[8];
> > - dma_addr_t dma_transfer_addr; /* (in) dma addr for transfer_buffer */
> > - u8 bpending[8];
> > - int last[8];
> > };
> >
> > struct xmit_frame {
> > diff --git a/drivers/staging/rtl8188eu/os_dep/xmit_linux.c
> > b/drivers/staging/rtl8188eu/os_dep/xmit_linux.c
> > index 017e1d628461..61ced1160951 100644
> > --- a/drivers/staging/rtl8188eu/os_dep/xmit_linux.c
> > +++ b/drivers/staging/rtl8188eu/os_dep/xmit_linux.c
> > @@ -24,7 +24,6 @@ int rtw_os_xmit_resource_alloc(struct adapter *padapter,
> > return _FAIL;
> >
> > pxmitbuf->pbuf = PTR_ALIGN(pxmitbuf->pallocated_buf, XMITBUF_ALIGN_SZ);
>
> Not related to this patch but kmalloc always returns data which is at
> least ARCH_KMALLOC_MINALIGN aligned which is never less than
> XMITBUF_ALIGN_SZ (4) so this is a no-op.
The alignment in the driver is pretty crazy because it's all unnecessary
and so complicated. Every allocation is 4 bytes extra so we can align
it later.
Also every buffer is called "pbuf" which stands for pointer to buffer.
"pallocated_buf" is not really useful either.
I tried to look at this to see if we could change the alignment, and
it's complicated because of the naming and the alignment.
regards,
dan carpenter
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