On Fri, May 20, 2022 at 12:09:55AM +0300, Pavel Skripkin wrote: > rtw_read16() reads data from device via USB API which may fail. In case > of any failure previous code returned stack data to callers, which is > wrong. > > Fix it by changing rtw_read16() prototype and prevent caller from > touching random stack data > > Signed-off-by: Pavel Skripkin <paskripkin@xxxxxxxxx> > --- > > Changes since v1: > - Fixed style issue > > --- > .../staging/r8188eu/hal/rtl8188e_hal_init.c | 21 ++++++++++++--- > drivers/staging/r8188eu/hal/rtl8188e_phycfg.c | 8 ++++-- > drivers/staging/r8188eu/hal/usb_halinit.c | 27 ++++++++++++++++--- > drivers/staging/r8188eu/hal/usb_ops_linux.c | 13 ++++++--- > drivers/staging/r8188eu/include/rtw_io.h | 2 +- > drivers/staging/r8188eu/os_dep/ioctl_linux.c | 9 ++++--- > drivers/staging/r8188eu/os_dep/os_intfs.c | 6 ++++- > 7 files changed, 67 insertions(+), 19 deletions(-) > > diff --git a/drivers/staging/r8188eu/hal/rtl8188e_hal_init.c b/drivers/staging/r8188eu/hal/rtl8188e_hal_init.c > index e67ecbd1ba79..6662ebc30f7b 100644 > --- a/drivers/staging/r8188eu/hal/rtl8188e_hal_init.c > +++ b/drivers/staging/r8188eu/hal/rtl8188e_hal_init.c > @@ -249,11 +249,14 @@ static void efuse_read_phymap_from_txpktbuf( > hi32 = cpu_to_le32(rtw_read32(adapter, REG_PKTBUF_DBG_DATA_H)); > > if (i == 0) { > + u16 reg; > + > /* Although lenc is only used in a debug statement, > * do not remove it as the rtw_read16() call consumes > * 2 bytes from the EEPROM source. > */ > - rtw_read16(adapter, REG_PKTBUF_DBG_DATA_L); > + res = rtw_read16(adapter, REG_PKTBUF_DBG_DATA_L, ®); > + (void)res; Same here, that line isn't ok. thanks, greg k-h