From 01b1d975597dd051515fe90e5b0b09cc700e6aa0 Mon Sep 17 00:00:00 2001 From: Hans Verkuil Date: Thu, 20 Sep 2012 09:06:28 -0300 Subject: [media] vpif_display: fix cleanup code The cleanup sequence was incorrect and could cause a kernel oops. Signed-off-by: Hans Verkuil Acked-by: Lad, Prabhakar Tested-by: Lad, Prabhakar Signed-off-by: Mauro Carvalho Chehab --- drivers/media/platform/davinci/vpif_display.c | 33 ++++++++++++++++----------- 1 file changed, 20 insertions(+), 13 deletions(-) (limited to 'drivers/media/platform/davinci') diff --git a/drivers/media/platform/davinci/vpif_display.c b/drivers/media/platform/davinci/vpif_display.c index f5b5c8d5028e..4e2800043c9f 100644 --- a/drivers/media/platform/davinci/vpif_display.c +++ b/drivers/media/platform/davinci/vpif_display.c @@ -1607,7 +1607,8 @@ static __init int vpif_probe(struct platform_device *pdev) { struct vpif_subdev_info *subdevdata; struct vpif_display_config *config; - int i, j = 0, k, q, m, err = 0; + int i, j = 0, k, err = 0; + int res_idx = 0; struct i2c_adapter *i2c_adap; struct common_obj *common; struct channel_obj *ch; @@ -1630,21 +1631,22 @@ static __init int vpif_probe(struct platform_device *pdev) return err; } - k = 0; - while ((res = platform_get_resource(pdev, IORESOURCE_IRQ, k))) { + while ((res = platform_get_resource(pdev, IORESOURCE_IRQ, res_idx))) { for (i = res->start; i <= res->end; i++) { if (request_irq(i, vpif_channel_isr, IRQF_SHARED, - "VPIF_Display", - (void *)(&vpif_obj.dev[k]->channel_id))) { + "VPIF_Display", (void *) + (&vpif_obj.dev[res_idx]->channel_id))) { err = -EBUSY; + for (j = 0; j < i; j++) + free_irq(j, (void *) + (&vpif_obj.dev[res_idx]->channel_id)); goto vpif_int_err; } } - k++; + res_idx++; } for (i = 0; i < VPIF_DISPLAY_MAX_DEVICES; i++) { - /* Get the pointer to the channel object */ ch = vpif_obj.dev[i]; @@ -1699,7 +1701,7 @@ static __init int vpif_probe(struct platform_device *pdev) if (vpif_obj.sd == NULL) { vpif_err("unable to allocate memory for subdevice pointers\n"); err = -ENOMEM; - goto vpif_int_err; + goto vpif_sd_error; } for (i = 0; i < subdev_count; i++) { @@ -1776,14 +1778,19 @@ probe_out: } probe_subdev_out: kfree(vpif_obj.sd); +vpif_sd_error: + for (i = 0; i < VPIF_DISPLAY_MAX_DEVICES; i++) { + ch = vpif_obj.dev[i]; + /* Note: does nothing if ch->video_dev == NULL */ + video_device_release(ch->video_dev); + } vpif_int_err: v4l2_device_unregister(&vpif_obj.v4l2_dev); vpif_err("VPIF IRQ request failed\n"); - for (q = k; k >= 0; k--) { - for (m = i; m >= res->start; m--) - free_irq(m, (void *)(&vpif_obj.dev[k]->channel_id)); - res = platform_get_resource(pdev, IORESOURCE_IRQ, k-1); - m = res->end; + for (i = 0; i < res_idx; i++) { + res = platform_get_resource(pdev, IORESOURCE_IRQ, i); + for (j = res->start; j <= res->end; j++) + free_irq(j, (void *)(&vpif_obj.dev[i]->channel_id)); } return err; -- cgit v1.2.1