diff options
| -rw-r--r-- | drivers/media/usb/stk1160/stk1160-video.c | 23 | ||||
| -rw-r--r-- | drivers/media/usb/stk1160/stk1160.h | 5 |
2 files changed, 24 insertions, 4 deletions
diff --git a/drivers/media/usb/stk1160/stk1160-video.c b/drivers/media/usb/stk1160/stk1160-video.c index 8bdfb027531..fa3671de02a 100644 --- a/drivers/media/usb/stk1160/stk1160-video.c +++ b/drivers/media/usb/stk1160/stk1160-video.c @@ -475,7 +475,11 @@ int stk1160_alloc_isoc(struct stk1160 *dev) if (!dev->isoc_ctl.transfer_buffer[i]) { stk1160_err("cannot alloc %d bytes for tx[%d] buffer\n", sb_size, i); - goto free_i_bufs; + + /* Not enough transfer buffers, so just give up */ + if (i < STK1160_MIN_BUFS) + goto free_i_bufs; + goto nomore_tx_bufs; } memset(dev->isoc_ctl.transfer_buffer[i], 0, sb_size); @@ -506,13 +510,28 @@ int stk1160_alloc_isoc(struct stk1160 *dev) } } - stk1160_dbg("urbs allocated\n"); + stk1160_dbg("%d urbs allocated\n", num_bufs); /* At last we can say we have some buffers */ dev->isoc_ctl.num_bufs = num_bufs; return 0; +nomore_tx_bufs: + /* + * Failed to allocate desired buffer count. However, we may have + * enough to work fine, so we just free the extra urb, + * store the allocated count and keep going, fingers crossed! + */ + usb_free_urb(dev->isoc_ctl.urb[i]); + dev->isoc_ctl.urb[i] = NULL; + + stk1160_warn("%d urbs allocated. Trying to continue...\n", i - 1); + + dev->isoc_ctl.num_bufs = i - 1; + + return 0; + free_i_bufs: /* Save the allocated buffers so far, so we can properly free them */ dev->isoc_ctl.num_bufs = i+1; diff --git a/drivers/media/usb/stk1160/stk1160.h b/drivers/media/usb/stk1160/stk1160.h index 68c8707d36a..05b05b160e1 100644 --- a/drivers/media/usb/stk1160/stk1160.h +++ b/drivers/media/usb/stk1160/stk1160.h @@ -30,11 +30,12 @@ #define STK1160_VERSION "0.9.5" #define STK1160_VERSION_NUM 0x000905 -/* TODO: Decide on number of packets for each buffer */ +/* Decide on number of packets for each buffer */ #define STK1160_NUM_PACKETS 64 /* Number of buffers for isoc transfers */ -#define STK1160_NUM_BUFS 16 /* TODO */ +#define STK1160_NUM_BUFS 16 +#define STK1160_MIN_BUFS 1 /* TODO: This endpoint address should be retrieved */ #define STK1160_EP_VIDEO 0x82 |