From bd1f976cc95b0689f889c8d93434ee61dd09b08b Mon Sep 17 00:00:00 2001 From: Mauro Carvalho Chehab Date: Fri, 7 Oct 2016 06:40:24 -0300 Subject: [media] dib0700: be sure that dib0700_ctrl_rd() users can do DMA dib0700_ctrl_rd() takes a RX and a TX pointer. Be sure that both will point to a memory allocated via kmalloc(). Reviewed-by: Patrick Boettcher Signed-off-by: Mauro Carvalho Chehab --- drivers/media/usb/dvb-usb/dib0700_core.c | 4 +++- drivers/media/usb/dvb-usb/dib0700_devices.c | 25 +++++++++++++------------ 2 files changed, 16 insertions(+), 13 deletions(-) (limited to 'drivers/media') diff --git a/drivers/media/usb/dvb-usb/dib0700_core.c b/drivers/media/usb/dvb-usb/dib0700_core.c index f319665..515f89d 100644 --- a/drivers/media/usb/dvb-usb/dib0700_core.c +++ b/drivers/media/usb/dvb-usb/dib0700_core.c @@ -292,13 +292,15 @@ static int dib0700_i2c_xfer_legacy(struct i2c_adapter *adap, /* special thing in the current firmware: when length is zero the read-failed */ len = dib0700_ctrl_rd(d, st->buf, msg[i].len + 2, - msg[i+1].buf, msg[i+1].len); + st->buf, msg[i + 1].len); if (len <= 0) { deb_info("I2C read failed on address 0x%02x\n", msg[i].addr); break; } + memcpy(msg[i + 1].buf, st->buf, msg[i + 1].len); + msg[i+1].len = len; i++; diff --git a/drivers/media/usb/dvb-usb/dib0700_devices.c b/drivers/media/usb/dvb-usb/dib0700_devices.c index 0857b56..ef1b8ee 100644 --- a/drivers/media/usb/dvb-usb/dib0700_devices.c +++ b/drivers/media/usb/dvb-usb/dib0700_devices.c @@ -508,8 +508,6 @@ static int stk7700ph_tuner_attach(struct dvb_usb_adapter *adap) #define DEFAULT_RC_INTERVAL 50 -static u8 rc_request[] = { REQUEST_POLL_RC, 0 }; - /* * This function is used only when firmware is < 1.20 version. Newer * firmwares use bulk mode, with functions implemented at dib0700_core, @@ -517,7 +515,6 @@ static u8 rc_request[] = { REQUEST_POLL_RC, 0 }; */ static int dib0700_rc_query_old_firmware(struct dvb_usb_device *d) { - u8 key[4]; enum rc_type protocol; u32 scancode; u8 toggle; @@ -532,39 +529,43 @@ static int dib0700_rc_query_old_firmware(struct dvb_usb_device *d) return 0; } - i = dib0700_ctrl_rd(d, rc_request, 2, key, 4); + st->buf[0] = REQUEST_POLL_RC; + st->buf[1] = 0; + + i = dib0700_ctrl_rd(d, st->buf, 2, st->buf, 4); if (i <= 0) { err("RC Query Failed"); - return -1; + return -EIO; } /* losing half of KEY_0 events from Philipps rc5 remotes.. */ - if (key[0] == 0 && key[1] == 0 && key[2] == 0 && key[3] == 0) + if (st->buf[0] == 0 && st->buf[1] == 0 + && st->buf[2] == 0 && st->buf[3] == 0) return 0; - /* info("%d: %2X %2X %2X %2X",dvb_usb_dib0700_ir_proto,(int)key[3-2],(int)key[3-3],(int)key[3-1],(int)key[3]); */ + /* info("%d: %2X %2X %2X %2X",dvb_usb_dib0700_ir_proto,(int)st->buf[3 - 2],(int)st->buf[3 - 3],(int)st->buf[3 - 1],(int)st->buf[3]); */ dib0700_rc_setup(d, NULL); /* reset ir sensor data to prevent false events */ switch (d->props.rc.core.protocol) { case RC_BIT_NEC: /* NEC protocol sends repeat code as 0 0 0 FF */ - if ((key[3-2] == 0x00) && (key[3-3] == 0x00) && - (key[3] == 0xff)) { + if ((st->buf[3 - 2] == 0x00) && (st->buf[3 - 3] == 0x00) && + (st->buf[3] == 0xff)) { rc_repeat(d->rc_dev); return 0; } protocol = RC_TYPE_NEC; - scancode = RC_SCANCODE_NEC(key[3-2], key[3-3]); + scancode = RC_SCANCODE_NEC(st->buf[3 - 2], st->buf[3 - 3]); toggle = 0; break; default: /* RC-5 protocol changes toggle bit on new keypress */ protocol = RC_TYPE_RC5; - scancode = RC_SCANCODE_RC5(key[3-2], key[3-3]); - toggle = key[3-1]; + scancode = RC_SCANCODE_RC5(st->buf[3 - 2], st->buf[3 - 3]); + toggle = st->buf[3 - 1]; break; } -- cgit v1.1