diff options
| author | Mike Isely <isely@pobox.com> | 2010-05-15 00:09:47 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2010-06-01 01:19:47 -0300 |
| commit | 6861800c1512ca8452c5f350a7c0af445ece773b (patch) | |
| tree | 7c0f4898aebf138a72fadf069d01396beb053a0f | |
| parent | c641a18969178ac1649e022156c85adb7c889451 (diff) | |
V4L/DVB: pvrusb2: Avoid using stack allocated buffers when performing USB I/O
Drivers shouldn't assume that the stack is DMA-safe.
[mchehab@redhat.com: fix patch description]
Signed-off-by: Mike Isely <isely@pobox.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
| -rw-r--r-- | drivers/media/video/pvrusb2/pvrusb2-hdw.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/drivers/media/video/pvrusb2/pvrusb2-hdw.c b/drivers/media/video/pvrusb2/pvrusb2-hdw.c index 301ef197d038..d13232d51823 100644 --- a/drivers/media/video/pvrusb2/pvrusb2-hdw.c +++ b/drivers/media/video/pvrusb2/pvrusb2-hdw.c @@ -4084,12 +4084,20 @@ void pvr2_hdw_device_reset(struct pvr2_hdw *hdw) void pvr2_hdw_cpureset_assert(struct pvr2_hdw *hdw,int val) { - char da[1]; + char *da; unsigned int pipe; int ret; if (!hdw->usb_dev) return; + da = kmalloc(16, GFP_KERNEL); + + if (da == NULL) { + pvr2_trace(PVR2_TRACE_ERROR_LEGS, + "Unable to allocate memory to control CPU reset"); + return; + } + pvr2_trace(PVR2_TRACE_INIT,"cpureset_assert(%d)",val); da[0] = val ? 0x01 : 0x00; @@ -4103,6 +4111,8 @@ void pvr2_hdw_cpureset_assert(struct pvr2_hdw *hdw,int val) "cpureset_assert(%d) error=%d",val,ret); pvr2_hdw_render_useless(hdw); } + + kfree(da); } |