On 1/21/2013 6:32 PM, Julia Lawall wrote: > From: Julia Lawall <Julia.Lawall@xxxxxxx> > > Delete successive tests to the same location. The current value of ln has > been tested already, and is clearly not NULL, given the enclosing if > condition. Furthermore, the result of csio_lnode_alloc is currently > ignored. > > A simplified version of the semantic match that finds this problem is as > follows: (http://coccinelle.lip6.fr/) > > // <smpl> > @s exists@ > local idexpression y; > expression x,e; > @@ > > *if ( \(x == NULL\|IS_ERR(x)\|y != 0\) ) > { ... when forall > return ...; } > ... when != \(y = e\|y += e\|y -= e\|y |= e\|y &= e\|y++\|y--\|&y\) > when != \(XT_GETPAGE(...,y)\|WMI_CMD_BUF(...)\) > *if ( \(x == NULL\|IS_ERR(x)\|y != 0\) ) > { ... when forall > return ...; } > // </smpl> > > Signed-off-by: Julia Lawall <Julia.Lawall@xxxxxxx> > > --- > Not tested. I don't know if this is the right fix. > > drivers/scsi/csiostor/csio_lnode.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/scsi/csiostor/csio_lnode.c b/drivers/scsi/csiostor/csio_lnode.c > index ffe9be0..d956f97 100644 > --- a/drivers/scsi/csiostor/csio_lnode.c > +++ b/drivers/scsi/csiostor/csio_lnode.c > @@ -873,7 +873,7 @@ csio_handle_link_up(struct csio_hw *hw, uint8_t portid, uint32_t fcfi, > if (ln->vnp_flowid != CSIO_INVALID_IDX) { > /* New VN-Port */ > spin_unlock_irq(&hw->lock); > - csio_lnode_alloc(hw); > + ln = csio_lnode_alloc(hw); > spin_lock_irq(&hw->lock); > if (!ln) { > csio_err(hw, > -- Acked-by: Naresh Kumar Inna <naresh@xxxxxxxxxxx> Thanks, Naresh. -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
