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-rw-r--r--drivers/usb/serial/mos7720.c13
1 files changed, 10 insertions, 3 deletions
diff --git a/drivers/usb/serial/mos7720.c b/drivers/usb/serial/mos7720.c
index 4538dc3f3ff..6ba87e6e28c 100644
--- a/drivers/usb/serial/mos7720.c
+++ b/drivers/usb/serial/mos7720.c
@@ -333,6 +333,7 @@ static int mos7720_open(struct usb_serial_port *port, struct file * filp)
int response;
int port_number;
char data;
+ int allocated_urbs = 0;
int j;
serial = port->serial;
@@ -365,10 +366,16 @@ static int mos7720_open(struct usb_serial_port *port, struct file * filp)
GFP_KERNEL);
if (!urb->transfer_buffer) {
err("%s-out of memory for urb buffers.", __FUNCTION__);
+ usb_free_urb(mos7720_port->write_urb_pool[j]);
+ mos7720_port->write_urb_pool[j] = NULL;
continue;
}
+ allocated_urbs++;
}
+ if (!allocated_urbs)
+ return -ENOMEM;
+
/* Initialize MCS7720 -- Write Init values to corresponding Registers
*
* Register Index
@@ -526,7 +533,7 @@ static int mos7720_chars_in_buffer(struct usb_serial_port *port)
}
for (i = 0; i < NUM_URBS; ++i) {
- if (mos7720_port->write_urb_pool[i]->status == -EINPROGRESS)
+ if (mos7720_port->write_urb_pool[i] && mos7720_port->write_urb_pool[i]->status == -EINPROGRESS)
chars += URB_TRANSFER_BUFFER_SIZE;
}
dbg("%s - returns %d", __FUNCTION__, chars);
@@ -629,7 +636,7 @@ static int mos7720_write_room(struct usb_serial_port *port)
}
for (i = 0; i < NUM_URBS; ++i) {
- if (mos7720_port->write_urb_pool[i]->status != -EINPROGRESS)
+ if (mos7720_port->write_urb_pool[i] && mos7720_port->write_urb_pool[i]->status != -EINPROGRESS)
room += URB_TRANSFER_BUFFER_SIZE;
}
@@ -664,7 +671,7 @@ static int mos7720_write(struct usb_serial_port *port,
urb = NULL;
for (i = 0; i < NUM_URBS; ++i) {
- if (mos7720_port->write_urb_pool[i]->status != -EINPROGRESS) {
+ if (mos7720_port->write_urb_pool[i] && mos7720_port->write_urb_pool[i]->status != -EINPROGRESS) {
urb = mos7720_port->write_urb_pool[i];
dbg("URB:%d",i);
break;