From 8715b16eadef74e9cf167f44961354f54b547e2a Mon Sep 17 00:00:00 2001 From: Patrice Chotard Date: Mon, 18 Apr 2011 17:38:37 -0300 Subject: [PATCH] [media] gspca - jeilinj: use gspca_dev->usb_err to forward error to upper layer MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Signed-off-by: Patrice CHOTARD Signed-off-by: Jean-François Moine Signed-off-by: Mauro Carvalho Chehab --- drivers/media/video/gspca/jeilinj.c | 43 +++++++++++++++++-------------------- 1 file changed, 20 insertions(+), 23 deletions(-) diff --git a/drivers/media/video/gspca/jeilinj.c b/drivers/media/video/gspca/jeilinj.c index 33de177..32494fbf 100644 --- a/drivers/media/video/gspca/jeilinj.c +++ b/drivers/media/video/gspca/jeilinj.c @@ -71,39 +71,44 @@ static struct v4l2_pix_format jlj_mode[] = { */ /* All commands are two bytes only */ -static int jlj_write2(struct gspca_dev *gspca_dev, unsigned char *command) +static void jlj_write2(struct gspca_dev *gspca_dev, unsigned char *command) { int retval; + if (gspca_dev->usb_err < 0) + return; memcpy(gspca_dev->usb_buf, command, 2); retval = usb_bulk_msg(gspca_dev->dev, usb_sndbulkpipe(gspca_dev->dev, 3), gspca_dev->usb_buf, 2, NULL, 500); - if (retval < 0) + if (retval < 0) { err("command write [%02x] error %d", gspca_dev->usb_buf[0], retval); - return retval; + gspca_dev->usb_err = retval; + } } /* Responses are one byte only */ -static int jlj_read1(struct gspca_dev *gspca_dev, unsigned char response) +static void jlj_read1(struct gspca_dev *gspca_dev, unsigned char response) { int retval; + if (gspca_dev->usb_err < 0) + return; retval = usb_bulk_msg(gspca_dev->dev, usb_rcvbulkpipe(gspca_dev->dev, 0x84), gspca_dev->usb_buf, 1, NULL, 500); response = gspca_dev->usb_buf[0]; - if (retval < 0) + if (retval < 0) { err("read command [%02x] error %d", gspca_dev->usb_buf[0], retval); - return retval; + gspca_dev->usb_err = retval; + } } static int jlj_start(struct gspca_dev *gspca_dev) { int i; - int retval = -1; u8 response = 0xff; struct sd *sd = (struct sd *) gspca_dev; struct jlj_command start_commands[] = { @@ -138,16 +143,13 @@ static int jlj_start(struct gspca_dev *gspca_dev) sd->blocks_left = 0; for (i = 0; i < ARRAY_SIZE(start_commands); i++) { - retval = jlj_write2(gspca_dev, start_commands[i].instruction); - if (retval < 0) - return retval; + jlj_write2(gspca_dev, start_commands[i].instruction); if (start_commands[i].ack_wanted) - retval = jlj_read1(gspca_dev, response); - if (retval < 0) - return retval; + jlj_read1(gspca_dev, response); } - PDEBUG(D_ERR, "jlj_start retval is %d", retval); - return retval; + if (gspca_dev->usb_err < 0) + PDEBUG(D_ERR, "Start streaming command failed"); + return gspca_dev->usb_err; } static void sd_pkt_scan(struct gspca_dev *gspca_dev, @@ -250,26 +252,21 @@ static void sd_stopN(struct gspca_dev *gspca_dev) /* this function is called at probe and resume time */ static int sd_init(struct gspca_dev *gspca_dev) { - return 0; + return gspca_dev->usb_err; } /* Set up for getting frames. */ static int sd_start(struct gspca_dev *gspca_dev) { struct sd *dev = (struct sd *) gspca_dev; - int ret; /* create the JPEG header */ jpeg_define(dev->jpeg_hdr, gspca_dev->height, gspca_dev->width, 0x21); /* JPEG 422 */ jpeg_set_qual(dev->jpeg_hdr, dev->quality); PDEBUG(D_STREAM, "Start streaming at 320x240"); - ret = jlj_start(gspca_dev); - if (ret < 0) { - PDEBUG(D_ERR, "Start streaming command failed"); - return ret; - } - return 0; + jlj_start(gspca_dev); + return gspca_dev->usb_err; } /* Table of supported USB devices */ -- 2.7.4