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| author | Vijay Badawadagi <bvijay@ti.com> | 2011-08-10 10:18:33 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2011-08-22 14:13:33 -0700 |
| commit | 78bb9697e2c4b62c426f1a2571c293a2e4463adf (patch) | |
| tree | a760fc3b3b4b39ce808434f97fea864c9346c1b4 /drivers/misc | |
| parent | 74a4fcf19eed6550651f455db5741fd216b4f004 (diff) | |
| download | linux-78bb9697e2c4b62c426f1a2571c293a2e4463adf.tar.gz | |
drivers:misc: ti-st: fail-safe on wrong pkt type
Texas Instrument's shared transport driver interpret incoming data from the UART based on the various protocol drivers registered to the driver such as btwilink driver or FM or GPS driver which provide logical channel IDs. In case of bad-behavior from chip such as HCI Event response for a GPS command or a HCI Event (h/w error event) for a FM response & In case of bad-behavior from UART driver such as dropping data bytes a fail-safe is required to avoid kernel panic. Signed-off-by: Pavan Savoy <pavan_savoy@ti.com> Signed-off-by: Vijay Badawadagi <bvijay@ti.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/misc')
| -rw-r--r-- | drivers/misc/ti-st/st_core.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/misc/ti-st/st_core.c b/drivers/misc/ti-st/st_core.c index c8e335db3451..1f973ce3043f 100644 --- a/drivers/misc/ti-st/st_core.c +++ b/drivers/misc/ti-st/st_core.c @@ -338,6 +338,12 @@ void st_int_recv(void *disc_data, /* Unknow packet? */ default: type = *ptr; + if (st_gdata->list[type] == NULL) { + pr_err("chip/interface misbehavior dropping" + " frame starting with 0x%02x", type); + goto done; + + } st_gdata->rx_skb = alloc_skb( st_gdata->list[type]->max_frame_size, GFP_ATOMIC); @@ -354,6 +360,7 @@ void st_int_recv(void *disc_data, ptr++; count--; } +done: spin_unlock_irqrestore(&st_gdata->lock, flags); pr_debug("done %s", __func__); return; |